# Dr Marian Florescu

## Senior Lecturer

Email: m.florescu@surrey.ac.uk

Phone: Work: 01483 68 6813

Room no: 26 ATI 02

## Further information

## Biography

Marian Florescu joined the University of Surrey in 2011. He graduated from the University of Bucharest with a BSc in Physics and then obtained his PhD in Theoretical Quantum Optics at the University of Toronto. Prior to joining the Physics Department at Surrey he was a Research Scholar and Lecturer at Princeton University and a National Research Council Research Associate at NASA Jet Propulsion Laboratory. His current activities are focused on the physics and applications of non-crystallographic photonic band gap materials, thermal radiation control in photonic materials and quantum optics in structured photonic reservoirs.

Please see my homepage for further details of my research.

## Research Interests

**MICRO- AND NANO-PHOTONICS**

- Fundamentals and applications of non-crystallographic photonic structures
- Thermal radiation in nano-structured photonic materials; thermal management and thermophotovoltaic energy conversion
- Quantum nonlinear optics and all-optical information processing in micro-structured photonic materials
- Physics of structural colours in biophotonic nanostructures

**NANO-ELECTRONICS AND SPINTRONICS**

- Temperature insensitive semiconductor materials: electronic structure and loss mechanisms in dilute bismide and nitride alloys
- Hyperuniform disordered 2D and 3D electronic systems: amorphous graphene and silicon models
- Flux quantization in disordered superconducting networks

**LINEAR OPTICAL QUANTUM COMPUTING IN PHOTONIC NANOSTRUCTURES**

- Single-photon sources and detectors
- Cavity-mediated entanglement of photonic and electronic excitations

## Publications

### Highlights

- 'Fast Assembly of Gold Nanoparticles in Large-Area 2-D Nanogrids Using a One-Step, Near-Infrared Radiation-Assisted Evaporation Process.'.
ACS nano,
#### Abstract

When fabricating photonic crystals from suspensions in volatile liquids using the horizontal deposition method, the conventional approach is to evaporate slowly to increase the time for particles to settle in an ordered, periodic close-packed structure. Here, we show that the greatest ordering of 10 nm aqueous gold nanoparticles (AuNPs) in a template of larger spherical polymer particles (mean diameter of 338 nm) is achieved with very fast water evaporation rates obtained with near-infrared radiative heating. Fabrication of arrays over areas of a few cm2 takes only seven minutes. The assembly process requires that the evaporation rate is fast relative to the particles' Brownian diffusion. Then a two-dimensional colloidal crystal forms at the falling surface, which acts as a sieve through which the AuNPs pass, according to our Langevin dynamics computer simulations. With sufficiently fast evaporation rates, we create a hybrid structure consisting of a two-dimensional AuNP nanoarray (or "nanogrid") on top of a three-dimensional polymer opal. The process is simple, fast and one-step. The interplay between the optical response of the plasmonic Au nanoarray and the microstructuring of the photonic opal results in unusual optical spectra with two extinction peaks, which are analyzed via finite-difference time-domain method simulations. Comparison between experimental and modelling results reveals a strong interplay of plasmonic modes and collective photonic effects, including the formation of a high-order stop band and slow-light enhanced plasmonic absorption. The structures, and hence their optical signatures, are tuned by adjusting the evaporation rate via the infrared power density.

.
(2016) - 'Unfolding the band structure of non-crystalline photonic band gap materials'.
Scientific Reports, 5 Article number 13301 , pp. 1-8.doi: 10.1038/srep13301
.
(2015)
- 'High-Q optical cavities in hyperuniform disordered materials'.
Physical Review B: Condensed Matter and Materials Physics, 91, pp. 020201-1-020201-5.
**Full text**is available at: http://epubs.surrey.ac.uk/807125/#### Abstract

We introduce designs for high-Q photonic cavities in slab architectures in hyperuniform disordered solids displaying isotropic band gaps. Despite their disordered character, hyperuniform disordered structures have the ability to tightly confine the transverse electric-polarized radiation in slab configurations that are readily fabricable. The architectures are based on carefully designed local modifications of otherwise unperturbed hyperuniform dielectric structures. We identify a wide range of confined cavity modes, which can be classified according to their approximate symmetry (monopole, dipole, quadrupole, etc.) of the confined electromagnetic wave pattern. We demonstrate that quality factors Q>109 can be achieved for purely two-dimensional structures, and that for three-dimensional finite-height photonic slabs, quality factors Q>20000 can be maintained.

.
(2015) - 'Isotropic band gaps and freeform waveguides observed in hyperuniform disordered photonic solids'. Proceedings of the National Academy of Sciences of USA, 120 (40), pp. 15886-15891. . (2013)
- 'Optical cavities and waveguides in hyperuniform disordered photonic solids'.
Physical Review B - Condensed Matter and Materials Physics, 87 (16)
**Full text**is available at: http://epubs.surrey.ac.uk/800775/#### Abstract

Using finite-difference time domain and band structure computer simulations, we show that it is possible to construct optical cavities and waveguide architectures in hyperuniform disordered photonic solids that are unattainable in photonic crystals. The cavity modes can be classified according to the symmetry (monopole, dipole, quadrupole, etc.) of the confined electromagnetic wave pattern. Owing to the isotropy of the band-gap characteristics of hyperuniform disordered solids, high-quality waveguides with free-form geometries (e.g., arbitrary bending angles) can be constructed that are unprecedented in periodic or quasiperiodic solids. These capabilities have implications for many photonic applications. © 2013 American Physical Society.

.
(2013) - 'Thermal emission from finite photonic crystals'.
APPLIED PHYSICS LETTERS, 95 (24) Article number ARTN 241103 doi: 10.1063/1.3275578
**Full text**is available at: http://epubs.surrey.ac.uk/104849/
.
(2009) - 'Designer disordered materials with large, complete photonic band gaps.'.
Proc Natl Acad Sci U S A, United States: 106 (49), pp. 20658-20663.
#### Abstract

We present designs of 2D, isotropic, disordered, photonic materials of arbitrary size with complete band gaps blocking all directions and polarizations. The designs with the largest band gaps are obtained by a constrained optimization method that starts from a hyperuniform disordered point pattern, an array of points whose number variance within a spherical sampling window grows more slowly than the volume. We argue that hyperuniformity, combined with uniform local topology and short-range geometric order, can explain how complete photonic band gaps are possible without long-range translational order. We note the ramifications for electronic and phononic band gaps in disordered materials.

.
(2009) - 'Complete band gaps in two-dimensional photonic quasicrystals'.
PHYSICAL REVIEW B, 80 (15) Article number ARTN 155112
**Full text**is available at: http://epubs.surrey.ac.uk/104832/
.
(2009) - 'Improving solar cell efficiency using photonic band-gap materials'. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 91 (17), pp. 1599-1610. . (2007)
- 'Thermal radiation in photonic crystals'.
PHYSICAL REVIEW B, 75 (20) Article number ARTN 201101
**Full text**is available at: http://epubs.surrey.ac.uk/104850/
.
(2007) - 'Spin relaxation in lateral quantum dots: Effects of spin-orbit interaction'.
PHYSICAL REVIEW B, 73 (4) Article number ARTN 045304
**Full text**is available at: http://epubs.surrey.ac.uk/104847/
.
(2006) - 'Resonance fluorescence in photonic band gap waveguide architectures: Engineering the vacuum for all-optical switching'.
Physical Review A - Atomic, Molecular, and Optical Physics, 69 (5 B), pp. 053810-1.
**Full text**is available at: http://epubs.surrey.ac.uk/104840/
.
(2004) - 'Single photons on demand from 3D photonic band-gap structures'.
Europhysics Letterrs, 69
#### Abstract

We describe a practical implementation of a (semi-deterministic) photon gun based on stimulated Raman adiabatic passage pumping and the strong enhancement of the photonic density of states in a photonic band-gap material. We show that this device allows {\em deterministic} and {\em unidirectional} production of single photons with a high repetition rate of the order of 100kHz. We also discuss specific 3D photonic microstructure architectures in which our model can be realized and the feasibility of implementing such a device using ${Er}^{3+}$ ions that produce single photons at the telecommunication wavelength of $1.55 \mu$m.

.
(2002) - 'Photonic bandgap materials: towards an all-optical micro-transistor'. JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS, 3 (6), pp. S103-S120. . (2001)
- 'Single-atom switching in photonic crystals'.
Physical Review A. Atomic, Molecular, and Optical Physics, 64 (3), pp. 033801/1-033801/21.
**Full text**is available at: http://epubs.surrey.ac.uk/164562/
.
(2001)

### Journal articles

- 'Fast Assembly of Gold Nanoparticles in Large-Area 2-D Nanogrids Using a One-Step, Near-Infrared Radiation-Assisted Evaporation Process.'.
ACS nano,
#### Abstract

When fabricating photonic crystals from suspensions in volatile liquids using the horizontal deposition method, the conventional approach is to evaporate slowly to increase the time for particles to settle in an ordered, periodic close-packed structure. Here, we show that the greatest ordering of 10 nm aqueous gold nanoparticles (AuNPs) in a template of larger spherical polymer particles (mean diameter of 338 nm) is achieved with very fast water evaporation rates obtained with near-infrared radiative heating. Fabrication of arrays over areas of a few cm2 takes only seven minutes. The assembly process requires that the evaporation rate is fast relative to the particles' Brownian diffusion. Then a two-dimensional colloidal crystal forms at the falling surface, which acts as a sieve through which the AuNPs pass, according to our Langevin dynamics computer simulations. With sufficiently fast evaporation rates, we create a hybrid structure consisting of a two-dimensional AuNP nanoarray (or "nanogrid") on top of a three-dimensional polymer opal. The process is simple, fast and one-step. The interplay between the optical response of the plasmonic Au nanoarray and the microstructuring of the photonic opal results in unusual optical spectra with two extinction peaks, which are analyzed via finite-difference time-domain method simulations. Comparison between experimental and modelling results reveals a strong interplay of plasmonic modes and collective photonic effects, including the formation of a high-order stop band and slow-light enhanced plasmonic absorption. The structures, and hence their optical signatures, are tuned by adjusting the evaporation rate via the infrared power density.

.
(2016) - 'Unfolding the band structure of non-crystalline photonic band gap materials'.
Scientific Reports, 5 Article number 13301 , pp. 1-8.doi: 10.1038/srep13301
.
(2015)
- 'High-Q optical cavities in hyperuniform disordered materials'.
Physical Review B: Condensed Matter and Materials Physics, 91, pp. 020201-1-020201-5.
**Full text**is available at: http://epubs.surrey.ac.uk/807125/#### Abstract

We introduce designs for high-Q photonic cavities in slab architectures in hyperuniform disordered solids displaying isotropic band gaps. Despite their disordered character, hyperuniform disordered structures have the ability to tightly confine the transverse electric-polarized radiation in slab configurations that are readily fabricable. The architectures are based on carefully designed local modifications of otherwise unperturbed hyperuniform dielectric structures. We identify a wide range of confined cavity modes, which can be classified according to their approximate symmetry (monopole, dipole, quadrupole, etc.) of the confined electromagnetic wave pattern. We demonstrate that quality factors Q>109 can be achieved for purely two-dimensional structures, and that for three-dimensional finite-height photonic slabs, quality factors Q>20000 can be maintained.

.
(2015) - 'Hyperuniform disordered photonic band gap devices for silicon photonics'.
IEEE International Conference on Group IV Photonics GFP, , pp. 33-34.
#### Abstract

© 2014 IEEE. We report experimental and simulation results for silicon waveguides and resonant cavities in hyperuniform disordered photonic solids. Our results demonstrate the ability of disordered photonic bandgap materials to serve as a platform for silicon photonics.

.
(2014) - 'Isotropic band gaps, optical cavities, and freeform waveguides in hyperuniform disordered photonic solids'.
Proc. SPIE 9162, Active Photonic Materials VI, 91620G (September 12, 2014), doi: 10.1117/12.2060683
.
(2014)
- 'Fabrication and optimization for waveguides in sub-micron scale hyperuniform disordered photonic bandgap materials'.
Optics InfoBase Conference Papers,
#### Abstract

We report experimental and simulation results for low-loss wave-guiding in Si-based hyperuniform disordered photonic bandgap materials at infrared wavelengths. These results pave the way for deploying disordered photonic solids in integrated photonic circuits. © 2014 Optical Society of America.

.
(2014) - 'Hyperuniform disordered photonic band gap silicon devices for optical interconnects'. Optical Interconnects Conference, 2014 IEEE, . (2014)
- 'Silicon waveguides and filters in hyperuniform disordered photonic solids for the near-infrared'.
Optics InfoBase Conference Papers,
#### Abstract

We report preliminary results for silicon waveguides and devices in hyperuniform disordered photonic solids. Temperature sensitivity of resonant defects is more than 500 times lower than that of the standard silicon microring resonators. © 2013 Optical Society of America.

.
(2014) - 'Silicon waveguides and filters in hyperuniform disordered photonic solids for the near-infrared'.
Optical Fiber Communication Conference, OFC 2014,
#### Abstract

We report preliminary results for silicon waveguides and devices in hyperuniform disordered photonic solids. Temperature sensitivity of resonant defects is more than 500 times lower than that of the standard silicon microring resonators. © 2013 Optical Society of America.

.
(2014) - 'Silicon waveguides and filters in hyperuniform disordered photonic solids for the near-infrared'.
Conference on Optical Fiber Communication, Technical Digest Series,
#### Abstract

We report preliminary results for silicon waveguides and devices in hyperuniform disordered photonic solids. Temperature sensitivity of resonant defects is more than 500 times lower than that of the standard silicon microring resonators. © 2014 OSA.

.
(2014) - 'Isotropic band gaps and freeform waveguides observed in hyperuniform disordered photonic solids'. Proceedings of the National Academy of Sciences of USA, 120 (40), pp. 15886-15891. . (2013)
- 'Photonic band gap in isotropic hyperuniform disordered solids with low dielectric contrast'.
Optics Express, 21 (17), pp. 19972-19981.doi: 10.1364/OE.21.019972
**Full text**is available at: http://epubs.surrey.ac.uk/800778/
.
(2013) - 'Erratum: Optical cavities and waveguides in hyperuniform disordered photonic solids (Physical Review B (2013) 87 (165116) DOI:10.1103/PhysRevB.87.165116)'. Physical Review B - Condensed Matter and Materials Physics, 87 (15) . (2013)
- 'Optical cavities and waveguides in hyperuniform disordered photonic solids'.
Physical Review B - Condensed Matter and Materials Physics, 87 (16)
**Full text**is available at: http://epubs.surrey.ac.uk/800775/#### Abstract

Using finite-difference time domain and band structure computer simulations, we show that it is possible to construct optical cavities and waveguide architectures in hyperuniform disordered photonic solids that are unattainable in photonic crystals. The cavity modes can be classified according to the symmetry (monopole, dipole, quadrupole, etc.) of the confined electromagnetic wave pattern. Owing to the isotropy of the band-gap characteristics of hyperuniform disordered solids, high-quality waveguides with free-form geometries (e.g., arbitrary bending angles) can be constructed that are unprecedented in periodic or quasiperiodic solids. These capabilities have implications for many photonic applications. © 2013 American Physical Society.

.
(2013) - 'Freeform wave-guiding at infrared regime in two dimensional disordered photonic bandgap materials'.
Optics InfoBase Conference Papers,
#### Abstract

We report the first experimental demonstration of guiding, bending and power-splitting of light in 2D disordered photonic bandgap materials at infrared wavelengths, along curved paths, around sharp bends of arbitrary angles, and through Y-shape junctions. © 2013 Optical Society of America.

.
(2013) - 'Modelling the Auger Recombination rates of GaAs(1-x)Bi x alloys'.
13th International Conference on Numerical Simulation of Optoelectronic Devices, NUSOD 2013, , pp. 81-82.
#### Abstract

We calculate the Conduction, Heavy Hole (HH) - Split-off Hole (SO), HH (CHSH) Auger Recombination rates for GaAs(1-x)Bix alloys, which are candidates for highly efficient telecommunication devices. A ten-band, tight-binding method, including spin-orbit coupling, was performed on a 9×9×9 strained supercell in order to generate an accurate band structure to perform the calculation on. This band structure was then unfolded to give a true E-k relation. As predicted by experiment, there should be a decrease in the Auger recombination rate as the concentration of Bismuth increases ending in a suppression at greater than ∼11% Bismuth. © 2013 IEEE.

.
(2013) - 'Effects of random link removal on the photonic band gaps of honeycomb networks'.
APPLIED PHYSICS LETTERS, 97 (20) Article number ARTN 201103 doi: 10.1063/1.3505322
**Full text**is available at: http://epubs.surrey.ac.uk/104834/
.
(2010) - 'Experimental observation of photonic bandgaps in hyperuniform disordered material'.
Optics InfoBase Conference Papers,
#### Abstract

We report the first experimental demonstration of photonic bandgaps (PBGs) in 2D hyperuniform disordered materials and show that is possible to obtain isotropic, disordered, photonic materials of arbitrary size with complete PBGs. © 2010 Optical Society of America.

.
(2010) - 'Thermal emission from finite photonic crystals'.
APPLIED PHYSICS LETTERS, 95 (24) Article number ARTN 241103 doi: 10.1063/1.3275578
**Full text**is available at: http://epubs.surrey.ac.uk/104849/
.
(2009) - 'Designer disordered materials with large, complete photonic band gaps.'.
Proc Natl Acad Sci U S A, United States: 106 (49), pp. 20658-20663.
#### Abstract

We present designs of 2D, isotropic, disordered, photonic materials of arbitrary size with complete band gaps blocking all directions and polarizations. The designs with the largest band gaps are obtained by a constrained optimization method that starts from a hyperuniform disordered point pattern, an array of points whose number variance within a spherical sampling window grows more slowly than the volume. We argue that hyperuniformity, combined with uniform local topology and short-range geometric order, can explain how complete photonic band gaps are possible without long-range translational order. We note the ramifications for electronic and phononic band gaps in disordered materials.

.
(2009) - 'Complete band gaps in two-dimensional photonic quasicrystals'.
PHYSICAL REVIEW B, 80 (15) Article number ARTN 155112
**Full text**is available at: http://epubs.surrey.ac.uk/104832/
.
(2009) - 'New classes of non-crystalline photonic band gap materials'. Optics InfoBase Conference Papers, . (2009)
- 'Improving solar cell efficiency using photonic band-gap materials'. SOLAR ENERGY MATERIALS AND SOLAR CELLS, 91 (17), pp. 1599-1610. . (2007)
- 'Thermal radiation in photonic crystals'.
PHYSICAL REVIEW B, 75 (20) Article number ARTN 201101
**Full text**is available at: http://epubs.surrey.ac.uk/104850/
.
(2007) - 'Single photons on demand from tunable 3D photonic band-gap structures'. JOURNAL OF MODERN OPTICS, 54 (2-3), pp. 409-416. . (2007)
- 'Single photons on demand from tunable 3D photonic band-gap structures'.
Journal of Modern Optics, 54 (3-4), pp. 409-416.
#### Abstract

In this article we propose to build a (semi-)deterministic photon gun by modifying the spontaneous decay in a photonic band-gap material. We show that such a device allows for deterministic and unidirectional single-photon emission with a repetition rate of the order of 100 kHz. We describe a specific realization of the 1D band-gap model by means of a 3D photonic-crystal heterostructure and the feasability of implementing such a device using Er3+ ions that produce single photons at the telecommunication wavelength of 1.55,m, important for many applications.

.
(2007) - 'Nonlinear tuning of 3D photonic band-gap structures for single-photon on demand sources'.
Physica E: Low-Dimensional Systems and Nanostructures, 32 (1-2 SPEC. ISS.), pp. 484-487.
#### Abstract

We describe a practical implementation of a semi-deterministic photon gun based on the stimulated Raman adiabatic passage pumping and the nonlinear tuning of the photonic density of states in a photonic band-gap material. We show that this device allows deterministic and unidirectional production of single photons with a high repetition rate of the order of 100 kHz. We also discuss specific 3D photonic microstructure architectures in which our model can be realized and the feasibility of implementing such a device using Er3 + ions that produce single photons at the telecommunication wavelength of 1.55 μ m. © 2006 Elsevier B.V. All rights reserved.

.
(2006) - 'Spin relaxation in lateral quantum dots: Effects of spin-orbit interaction'.
PHYSICAL REVIEW B, 73 (4) Article number ARTN 045304
**Full text**is available at: http://epubs.surrey.ac.uk/104847/
.
(2006) - 'Thermal emission and absorption of radiation in finite inverted-opal photonic crystals'.
PHYSICAL REVIEW A, 72 (3) Article number ARTN 033821
**Full text**is available at: http://epubs.surrey.ac.uk/104848/
.
(2005) - 'On the emission and absorption of thermal radiation in photonic crystals'.
Optics InfoBase Conference Papers,
#### Abstract

We investigate the general features of thermal emission and absorption of radiation in photonic crystals. The light-matter interaction is strongly affected by the presence of the three-dimensional photonic crystal and the alteration of the photonic density of states can be used to suppress or enhance the thermal emissivity and absorptivity of the dielectric structure. Our analysis shows that the thermal response of the system depends on both the elementary absorbers/emitters and the photonic reservoir characteristics. In particular, we demonstrate that, depending on the system configuration, the thermal emission may exceed the free-space radiative energy density given by Planck's law. This modification of the Planck's law is achieved without altering the optical properties of the absorber/emitter medium, which remain consistent with the usual definition of a frequency and angle dependent grey-body. We also evaluate the rate of spontaneous emission, stimulated emission and absorption for thermally driven two-level atomic systems in a photonic crystal, and introduce effective A and B coefficients for the case of a photonic crystal. © 2005 OSA/FIO.

.
(2005) - 'Exploiting the quantum Zeno effect to beat photon loss in linear optical
quantum information processors'.
Optics Communications,
#### Abstract

We devise a new technique to enhance transmission of quantum information through linear optical quantum information processors. The idea is based on applying the Quantum Zeno effect to the process of photon absorption. By frequently monitoring the presence of the photon through a QND (quantum non-demolition) measurement the absorption is suppressed. Quantum information is encoded in the polarization degrees of freedom and is therefore not affected by the measurement. Some implementations of the QND measurement are proposed.

.
(2004) - 'Resonance fluorescence in photonic band gap waveguide architectures: Engineering the vacuum for all-optical switching'.
Physical Review A - Atomic, Molecular, and Optical Physics, 69 (5 B), pp. 053810-1.
**Full text**is available at: http://epubs.surrey.ac.uk/104840/
.
(2004) - 'Single photons on demand from 3D photonic band-gap structures'.
Europhysics Letterrs, 69
#### Abstract

We describe a practical implementation of a (semi-deterministic) photon gun based on stimulated Raman adiabatic passage pumping and the strong enhancement of the photonic density of states in a photonic band-gap material. We show that this device allows {\em deterministic} and {\em unidirectional} production of single photons with a high repetition rate of the order of 100kHz. We also discuss specific 3D photonic microstructure architectures in which our model can be realized and the feasibility of implementing such a device using ${Er}^{3+}$ ions that produce single photons at the telecommunication wavelength of $1.55 \mu$m.

.
(2002) - 'Photonic bandgap materials: towards an all-optical micro-transistor'. JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS, 3 (6), pp. S103-S120. . (2001)
- 'Single-atom switching in photonic crystals'.
Physical Review A. Atomic, Molecular, and Optical Physics, 64 (3), pp. 033801/1-033801/21.
**Full text**is available at: http://epubs.surrey.ac.uk/164562/
.
(2001)

### Conference papers

- 'New designer dielectric metamaterial with isotropic photonic band gap'. Seattle, USA: Photonics Conference (IPC), 2013 IEEE (480) .
- 'Hyperuniform photonic slabs for high-Q cavities and low-loss waveguides'.
Active Photonic Materials VII, San Diego (USA): SPIE Optics & Photonics 9546, pp. 95460F-1-95460F-10.doi: 10.1117/12.2184054
.
(2015)
- 'Selectively reflective transparent sheets'. SPIE-INT SOC OPTICAL ENGINEERING
ACTIVE PHOTONIC MATERIALS VII, San Diego, CA: Conference on Active Photonic Materials VII 9546doi: 10.1117/12.2188622
.
(2015)
- 'Flexible cavity and waveguide light confinement in hyperuniform photonic slabs'.
Optical Sensors, Sensors 2015,
#### Abstract

We introduce novel planar hyperuniform-disordered (HUD) architectures as potential general-purpose platform for optical microcircuits. Efficient confinement of TE-polarized radiation and high-Q optical-cavities and low-loss waveguides is demonstrated using finite difference-time-domain and band-structure simulations. © 2015 Optical Society of America.

.
(2015) - 'Flexible cavity andwaveguide light confinement in hyperuniform photonic slabs'.
Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2015,
#### Abstract

We introduce novel planar hyperuniform-disordered (HUD) architectures as potential general-purpose platform for optical microcircuits. Efficient confinement of TE-polarized radiation and high-Q optical-cavities and low-loss waveguides is demonstrated using finite difference-time-domain and band-structure simulations. © 2015 Optical Society of America.

.
(2015) - 'Flexible cavity and waveguide light confinement in hyperuniform photonic slabs'.
Novel Optical Materials and Applications, NOMA 2015,
#### Abstract

We introduce novel planar hyperuniform-disordered (HUD) architectures as potential general-purpose platform for optical microcircuits. Efficient confinement of TE-polarized radiation and high-Q optical-cavities and low-loss waveguides is demonstrated using finite difference-time-domain and band-structure simulations. © 2015 Optical Society of America.

.
(2015) - 'Flexible cavity and waveguide light confinement in hyperuniform photonic slabs'.
Signal Processing in Photonic Communications, SPPCom 2015,
#### Abstract

.
(2015) - 'Flexible cavity and waveguide light confinement in hyperuniform photonic slabs'.
Photonic Networks and Devices, Networks 2015,
#### Abstract

.
(2015) - 'Light confinement in hyperuniform photonic slabs: High-Q cavities and low-loss waveguides'.
CLEO: Science and Innovations, CLEO-SI 2015,
#### Abstract

Using finite-difference-time-domain and band-structure simulations, we demonstrate efficient confinement of TE-polarized radiation and high-Q optical-cavities and low-loss waveguides in planar hyperuniform-disordered (HUD) architectures based on a design strategy that has potential to be a general purpose platform for optical microcircuits. © OSA 2015.

.
(2015) - 'Freeform wave-guiding and tunable frequency splitting in isotropic disordered photonic band gap materials'.
Frontiers in Optics
**Full text**is available at: http://epubs.surrey.ac.uk/802568/
.
(2012) - 'Experimental demonstration of guiding, bending, and filtering of electromagnetic wave in disordered photonic band gap materials'. Optical Society of America
Conference on Lasers and Electro-Optics 2012, OSA Technical Digest, San Jose, California United States: Quantum Electronics and Laser Science Conference
#### Abstract

We report the first experimental demonstration of guiding, bending, filtering, and splitting of EM wave in 2D disordered PBG materials, along arbitrarily curved paths, around sharp bends of arbitrary angles, and through Y shape junctions

.
(2012) - 'Photonic Band Gaps and Unusual Photon Transport in Hyperuniform Disordered Structures'. Optical Society of America
Frontiers in Optics 2012/Laser Science XXVIII, OSA Technical Digest (online), Rochester, New York United States: Frontiers in Optics
**Full text**is available at: http://epubs.surrey.ac.uk/802566/#### Abstract

We demonstrate that hyperuniform disordered structures support electromagnetic states with very different transport properties, ranging from Bloch-like modes to diffusive states with characteristic time scales almost two-orders of magnitude larger.

.
(2012) - 'Cavity Modes Study in Hyperuniform Disordered Photonic Bandgap Materials'. Optical Society of America
Frontiers in Optics 2012/Laser Science XXVIII, OSA Technical Digest (online), Rochester, New York United States: Frontiers in Optics
**Full text**is available at: http://epubs.surrey.ac.uk/802569/#### Abstract

We introduce novel architecture for cavity design in an isotropic disordered photonic band gap material. We demonstrate that point-like defects can support localized modes with different symmetries and multiple resonant frequencies, useful for various applications.

.
(2012) - 'Thermal emission from finite photonic crystals'. SPIE-INT SOC OPTICAL ENGINEERING
ACTIVE PHOTONIC MATERIALS III, San Diego, CA: Conference on Active Photonic Materials III 7756doi: 10.1117/12.860075
**Full text**is available at: http://epubs.surrey.ac.uk/104856/
.
(2010) - 'Experimental observation of photonic bandgaps in hyperuniform disordered material'. IEEE
2010 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (QELS), San Jose, CA: Conference on Lasers and Electro-Optics (CLEO)/Quantum Electronics and Laser Science Conference (QELS)
**Full text**is available at: http://epubs.surrey.ac.uk/104852/
.
(2010) - 'Properties of thermal radiation in photonic crystals'. IOP PUBLISHING LTD JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS, Bad Honnef, GERMANY: 1st International Workshop on Theoretical and Computational Nano-Photonics 11 (11) . (2009)
- 'New classes of non-crystalline photonic band gap materials'. Proccedings of The European Conference on Lasers and Electro-Optics and the XIth European Quantum Electronics Conference, Munich, Germany: CLEO/Europe - EQEC 2009 . (2009)
- 'Nonlinear tuning of 3D photonic band-gap structures for single-photon on demand sources'. ELSEVIER SCIENCE BV PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Albuquerque, NM: 12th International Conference on Modulated Semiconductor Structures (MSS12) 32 (1-2), pp. 484-487. . (2006)
- 'Three-dimensional photonic band-gap structures for single-photon on demand sources'. IEEE ICTON 2006: 8th International Conference on Transparent Optical Networks, Vol 2, Proceedings, Nottingham, ENGLAND: 8th International Conference on Transparent Optical Networks, pp. 40-43. . (2006)
- 'Spin-orbit interaction and spin relaxation in a lateral quantum dot'. ELSEVIER SCIENCE BV PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, Nara, JAPAN: 15th International Conference on Electronic Properties of Two-Dimensional Systems (EP2DS-15) 22 (1-3), pp. 414-417. . (2004)
- 'All-optical transistor action in photonic band gap materials'. SPIE-INT SOC OPTICAL ENGINEERING
APPLICATIONS OF PHOTONIC TECHNOLOGY 5, QUEBEC CITY, CANADA: 5th International Conference on Applications of Photonic Technology (ICAPT 2002) 4833, pp. 513-524.doi: 10.1117/12.474416
**Full text**is available at: http://epubs.surrey.ac.uk/104851/
.
(2002)

### Patents

- Narrow-band frequency filters and splitters, photonic sensors, and cavities having pre-selected cavity modes.
#### Abstract

Waveguides and electromagnetic cavities fabricated in hypemniform disordered materials with complete photonic bandgaps are provided. Devices comprising electromagnetic cavities fabricated in hypemniform disordered materials with complete photonic bandgaps are provided. Devices comprising waveguides fabricated in hypemniform disordered materials with complete photonic bandgaps are provided. The devices include electromagnetic splitters, filters, and sensors.

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- Non-crystalline materials having complete photonic, electronic, or phononic band gaps.
**Full text**is available at: http://epubs.surrey.ac.uk/802425/
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- Photonic crystal architectures for frequency- and angle-selective thermal emitters.
Article number US/20090217977 A1
**Full text**is available at: http://epubs.surrey.ac.uk/802426/
.
(2009)

PATENTS AND INVENTION DISCLOSURES

- Marian Florescu, Salvatore Torquato and Paul Steinhardt, "Non-crystalline Materials having Complete Photonic, Electronic, or Phononic Band Gaps", US and international patent application No. WO2011005530, 2010.
- Marian Florescu, Salvatore Torquato and Paul Steinhardt, "Method of Designing Photonic Heterostructures with Optimal Bandgap Properties for Arbitrary Symmetry and Arbitrary Long- Range Translational Order", Invention Disclosure, Office of Technology Licensing & Intellectual Property, Princeton University, 2008.
- Marian Florescu, Salvatore Torquato and Paul Steinhardt, Disordered Photonic Heterostructures and Uses Thereof, Invention Disclosure, Office of Technology Licensing & Intellectual Property, Princeton University, 2008.
- Marian Florescu, Jonathan P. Dowling and Hwang Lee, "Angular-Selective Absorber Based on a 3D Photonic Crystal: Application to High-Efficiency Solar Energy Conversion, US Provisional Patent Application No. 61030610, 2008.
- Nick Mardesich, Deborah Jackson and Marian Florescu, Thermal Photonic Photovoltaic Energy System, New Technology Report, NASA Jet Propulsion Laboratory, California Institute of Technology, 2006.
- Deborah Jackson and Marian Florescu, Integrated Prism Coupler for Light Trap Detector, New Technology Report, NASA Jet Propulsion Laboratory, California Institute of Technology, 2005.

## Teaching

- Level 3/M Nanophotonics
- Level 2 Light Lab
- Level 2 Electromagnetic Waves
- Level 1 Small Group Tutorials

## Departmental Duties

- Level 1 Coordinator
- Member of the Board of Studies Sub-Committee
- Member of Staff Student Liaison Committee
- ATI Seminar Organiser