2019

Exceptional points of any order in a single, lossy waveguide beam splitter by photon-number-resolved detection
Mario A. Quiroz-Juarez, Armando Perez-Leija, Konrad Tschernig, Blas M. Rodríguez-Lara, Omar S. Magana-Loaiza, Kurt Busch, Yogesh N. Joglekar, and Roberto de J. Leon-Montiel (2019)
Photonics Research 7:862

Exceptional points (EPs) are degeneracies of non-Hermitian operators where, in addition to the eigenvalues, the corresponding eigenmodes become degenerate. Classical and quantum photonic systems...

Two-particle quantum correlations in stochastically-coupled networks
R. de J. Leon-Montiel, V. Mendez, M. A. Quiroz-Juarez, A. Ortega, L. Benet, A. Perez-Leija, and K. Busch (2019)
New Journal of Physics 21:053041

Quantum walks in dynamically-disordered networks have become an invaluable tool for understanding the physics of open quantum systems. Although much work has been carried out considering...

Quantization of Quasinormal Modes for Open Cavities and Plasmonic Cavity Quantum Electrodynamics
S. Franke, S. Hughes, M.K. Dezfouli, P.T. Kristensen, K. Busch, A. Knorr, and M. Richter (2019)
Physical Review Letters 122:213901

We introduce a second quantization scheme based on quasinormal modes, which are the dissipative modes of leaky optical cavities and plasmonic resonators with complex eigenfrequencies. The theory...

Extended hydrodynamic description for nonequilibrium atom-surface interactions
D. Reiche, M. Oelschläger, K. Busch, and F. Intravaia (2019)
Journal of the Optical Society of America B 36:C52

The dissipative properties of spatially nonlocal conductors are investigated in the context of quantum friction acting on an atom moving above a macroscopic body. The focus is on an extended...

Low-loss fiber-to-chip couplers with ultrawide optical bandwidth
H. Gehring, M. Blaicher, W. Hartmann, P. Varytis, K. Busch, M. Wegener, and W.H.P. Pernice (2019)
APL Photonics 4:010801

Providing efficient access from optical fibers to on-chip photonic systems is a key challenge for integrated optics. In general, current solutions allow either narrowband out-of-plane coupling...

2018

Mie excitons: Understanding strong coupling in dielectric nanoparticles
C. Tserkezis, P. A. D. Gonçalves, C. Wolff, F. Todisco, K. Busch, and N. A. Mortensen (2018)
Physical Review B 98:155439

We theoretically analyze the hybrid Mie-exciton optical modes arising from the strong coupling of excitons in organic dyes or transition-metal dichalcogenides with the Mie resonances of high-...

Endurance of quantum coherence due to particle indistinguishability in noisy quantum networks
A. Perez-Leija, D. Guzman-Silva, R. de J. Leon-Montiel, M. Gräfe, M. Heinrich, H. Moya-Cessa, K. Busch, and A. Szameit (2018)
Nature Partner Journals (npj): Quantum Information 4:45

Quantum coherence, the physical property underlying fundamental phenomena such as multi-particle interference and entanglement, has emerged as a valuable resource upon which modern technologies...

Multiphoton discrete fractional Fourier dynamics in waveguide beam splitters
K. Tschernig, R. de J. Leon-Montiel, O. S. Magana-Loaiza, A. Szameit, K. Busch, and A. Perez-Leija (2018)
Journal of the Optical Society of America B 35:1985

We demonstrate that when a waveguide beam splitter (BS) is excited by N indistinguishable photons, the arising multiphoton states evolve in a way as if they were coupled to each other with...

Design study of random spectrometers for applications at optical frequencies
P. Varytis, D. Huynh, W. Hartmann, W. Pernice, and K. Busch (2018)
Optics Letters 43:3180

Compact spectrometers based on disordered planar waveguides exhibit a rather high resolution with a relatively small footprint compared to conventional spectrometers. This is achieved by...

Nonequilibrium atom-surface interaction with lossy multilayer structures
M. Oelschläger, K. Busch, and F. Intravaia (2018)
Physical Review A 97:062507

The impact of lossy multilayer structures on nonequilibrium atom-surface interactions is discussed. Specifically, the focus lies on a fully non-Markovian and nonequilibrium description of quantum...

A slab waveguide source for discontinuous Galerkin time-domain methods
D. Huynh, P. Varytis, and K. Busch (2018)
Proceedings of SPIE 10688, Photonics for Solar Energy Systems VII, 106880V

An essential device in opto-electronics is the optical waveguide. In the following we present a way to incorporate a waveguide eld source into numerical time-domain simulations via the total field...

Modified dipole-dipole interaction and dissipation in an atomic ensemble near surfaces
R. Jones, J. A. Needham, I. Lesanovsky, F. Intravaia, and B. Olmos
Physical Review A 97:053841

We study how the radiative properties of a dense ensemble of...

Waveguide-integrated single photon spectrometer based on tailored disorder (Conference Presentation)
W. Hartmann, P. Varytis, K. Busch, W. Pernice
SPIE Photonics Europe, 2018, Strasbourg, France

Integrated nanophotonic circuits allow for realizing complex optical functionality in a compact and reproducible fashion through high-yield nanofabrication. Typically configured for single-mode...

Anomalous resonances of an optical microcavity with a hyperbolic metamaterial core
E. Travkin, T. Kiel, S. Sadofev, K. Busch, O. Benson, and S. Kalusniak (2018)
Physical Review B 97:195133

We embed a hyperbolic metamaterial based on stacked layer pairs of epitaxially grown ZnO/ZnO:Ga in a monolithic optical microcavity, and we investigate the arising unique resonant effects...

Fluorescence enhancement by a dark plasmon mode
M. Peter, J.F.M.Werra, C. Friesen, D. Achnitz, K. Busch, and S. Linden (2018)
Appl. Phys. B 124:83

We investigate the fluorescence properties of colloidal quantum dots coupled to gold nanowire antennas. By varying the wire length, the plasmon modes of the nanoantennas are successively tuned...

Modal expansions in periodic photonic systems with material loss and dispersion
C. Wolff, K. Busch, and N. A. Mortensen (2018)
Physical Review B 97:104203

We study band-structure properties of periodic optical systems composed of lossy and intrinsically dispersive materials. To this end, we develop an analytical framework based on...

Plasmonic modes in nanowire dimers: A study based on the hydrodynamic Drude model including nonlocal and nonlinear effects
M. Moeferdt, T. Kiel, T. Sproll, F. Intravaia, and K. Busch (2018)
Physical Review B 97:75431

A combined analytical and numerical study of the modes in two distinct plasmonic nanowire systems is presented. The computations are based on a discontinuous Galerkin time-domain approach, and a...

Two-particle four-point correlations in dynamically disordered tight-binding networks
A. Perez-Leija, R. de J Leon-Montiel, J. Sperling, H. Moya-Cessa, A. Szameit, and K. Busch (2018)
Journal of Physics B 51:024002

We use the concept of two-particle probability amplitude to derive the stochastic evolution equation for two-particle four-point correlations in tight-binding networks affected by diagonal dynamic...

2017

Quantum coherences of indistinguishable particles
J. Sperling, A. Perez-Leija, K. Busch, and I. A. Walmsley (2017)
Physical Review A 96:032334
We study different notions of quantum correlations in multipartite systems of distinguishable and indistinguishable particles. Based on the definition of quantum coherence for a single particle, we...
Dynamical Casimir effect in stochastic systems: Photon harvesting through noise
R. Roman-Ancheyta, I. Ramos-Prieto, A. Perez-Leija, K. Busch, and R. de J- Leon-Montiel (2017)
Physical Review A 96:032501

We theoretically investigate the dynamical Casimir effect in a single-mode cavity endowed with a driven off-resonant mirror. We explore the dynamics of photon generation as a function of the ratio...

Pages