A5049539343- Photonic Crystals and Applications
- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Strong Light-Matter Interactions
- Random lasers and scattering media
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Semiconductor Quantum Structures and Devices
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Information and Cryptography
- Spectroscopy and Quantum Chemical Studies
- Metamaterials and Metasurfaces Applications
- Theoretical and Computational Physics
- Quantum chaos and dynamical systems
- Cold Atom Physics and Bose-Einstein Condensates
- Mechanical and Optical Resonators
- Terahertz technology and applications
- Advanced Thermodynamics and Statistical Mechanics
- Quantum many-body systems
- Orbital Angular Momentum in Optics
- Quantum Mechanics and Non-Hermitian Physics
- Advanced Fiber Laser Technologies
- Thermal Radiation and Cooling Technologies
- Optical Coatings and Gratings
- Physics of Superconductivity and Magnetism
Queens College, CUNY
2014-2024
City University of New York
2009-2022
The Graduate Center, CUNY
2008-2022
Queens University of Charlotte
2016
All Russia Research Institute of Automatics
2014-2015
Technion – Israel Institute of Technology
2015
Moscow Institute of Physics and Technology
2014
Institute of Theoretical and Applied Electrodynamics
2012-2014
Institute for Theoretical and Experimental Physics
2011
City College of New York
2005
We review quantum mechanical and optical pseudo- Hermitian systems with an emphasis on PT-symmetric important for optics electrodynamics. One of the most
We demonstrate the existence of a spectrally narrow localized surface state, so-called optical Tamm at interface between one-dimensional magnetophotonic and nonmagnetic photonic crystals. The state is located inside band gaps each crystals comprising this structure. This associated with sharp transmission peak through sample responsible for substantial enhancement Faraday rotation corresponding wavelength. experimental results are in excellent agreement theoretical predictions.
We study the optical properties of a photonic crystal interfaced with uniform medium negative dielectric constant or another crystal. show that, at such an interface, nonpropagating surface states may arise. These result in sharp feature transmission and reflection spectra system. also that interfacing magnetic nonmagnetic crystals gives rise to giant Faraday Kerr effects.
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The propagation of surface electromagnetic waves along photonic crystal (PC) boundaries is examined. It shown that in a number cases, these are backward waves. nature states localized at the PC boundary discussed; transfer no energy (their tangential wave zero). An analogy with well-known Tamm and Shockley solid state physics drawn. case PC, both types can be regarded as states. Experimental results on observation presented. A system using an external magnetic field to control considered.
The variance of the Lyapunov exponent is calculated exactly in one-dimensional Anderson model with random site energies distributed according to Cauchy distribution. We find a new significant scaling parameter system, and derive an exact analytical criterion for single which differs from commonly used condition phase randomization. results obtained are applied Kronig-Penney potential form periodically positioned $\ensuremath{\delta}$ functions strength.
We discuss phase transitions in $\mathcal{PT}$-symmetric optical systems. show that, due to frequency dispersion of the dielectric permittivity, an system can have $\mathcal{PT}$ symmetry at isolated points only. An assumption existence a continuous interval violates causality principle. Therefore, ideal symmetry-breaking transition cannot be observed by simply varying frequency.
We consider exciting surface plasmon polaritons in the Kretschmann configuration. Contrary to common belief, we show that a plane wave incident at an angle greater than of total internal reflection does not excite polaritons. These excitations do arise, however, if light forms narrow beam composed infinite number waves. The polariton is formed geometrical edge as result interference reflected
We demonstrate intracavity plasmonic laser spectroscopy using a created from periodically perforated silver film with liquid gain medium. An active zone of the is formed by highly elongated spot pumping. This results in significantly more efficient diffusive mixing dye molecules, which suppresses effect their bleaching, and ability to reduce volume medium as little 400 nl. use this design for stable multiple measurements that it effective spaser sensor detection an absorptive at 0.07 ppm....
We measure microwave intensity inside and transmission through random samples of polystyrene spheres with different output reflectors. show that appropriate boundary conditions diffusion theory gives an excellent description transport from the interior to surface a sample. From these measurements we determine mean free path reflectivities without additional assumptions regarding interface or scattering form factor. comparison measurement coefficient velocity find it is smaller than in...
By means of Monte Carlo simulations we show that there are two qualitatively different modes localization classical waves in 1D random periodic-on-average systems. States from pass bands and band edges the underlying structure demonstrate single parameter scaling with universal behavior. interior gaps do not have behavior require parameters to describe their properties. The transition between these types occurs an extremely narrow region frequencies. When degree disorder exceeds a certain...
We demonstrate that microscale tailoring of surfaces magnetophotonic crystals provides an approach to engineer responses known materials. In particular, we study states are spatially localized at the interface between and photonic crystals. Such optical analog Tamm long in solid-state physics. The spectrally located inside band gaps associated with a sharp transmission peak spectra system. Substantial enhancement Faraday rotation for wavelength state is experimentally observed attributed...
We show that net amplification of surface plasmons is achieved in channel a metal plate due to nonradiative excitation by quantum dots. This makes possible lossless plasmon transmission lines the as well and generation coherent plasmons. As an example, ring spaser considered.
The variance of the Lyapunov exponent is calculated exactly in one-dimensional Anderson model with random site energies distributed according to Cauchy distribution. We derive an exact analytical criterion for validity single parameter scaling this model. According criterion, states from conduction band underlying non-random system satisfy when disorder small enough. At same time, not valid close boundaries and those outside original spectrum even case disorder. obtained results are applied...
Exciton polaritons in one-dimensional photonic crystals based on multiple quantum well structures are investigated. The effects due to interplay between resonant interaction of light with excitons, and scattering from well-barrier interface, elucidated. Polariton dispersion equations reflection spectra two wells an elementary supercell the periodic structure studied. Several examples different compound supercells considered. Special attention is paid period or distance satisfying resonance...
We show that depending on the values of coupling constants, two scenarios for stationary behavior a chain interacting spasers may be realized: (1) all are synchronized and oscillate with unique phase or (2) nonlinear autowave travels along chain. In latter scenario, traveling wave is harmonic, unlike excitations in other known systems. Due to nature system, any initial distribution spaser states evolves into one these steady states.
We demonstrate that when the frequency of external field differs from lasing an autonomous spaser, spaser exhibits stochastic oscillations at low intensity. The plasmon lock to only amplitude exceeds a threshold value. find region values and detuning (the Arnold tongue) for which synchronizes with wave.
We demonstrate that interacting spasers arranged in a 2D array of arbitrary size can be mutually synchronized allowing them to supperradiate. For arrays smaller than the free space wavelength, total radiated power is proportional square number N spasers. larger arrays, radiation linear N. However, emitted beam becomes highly directional with intensity N^2 direction perpendicular plane array. Thus, spasers, which mainly amplify near fields, become an efficient source far field when they are into
In the approach to stationary regime, a surface plasmon amplification by stimulated emission of radiation exhibits complicated and highly nonlinear dynamics with anharmonic oscillations [M. I. Stockman, J. Opt. 12, 024004 (2010)]. We demonstrate that these are due Rabi quantum dot in field nanoparticle. show may or not arise depending on initial conditions.
Abstract We consider the transition from description of a closed quantum system consisting an open and reservoir to alone by eliminating degrees freedom averaging over them. An approach based on Lindblad master equation for density matrix is used. A general scheme developed deriving superoperator that emerges after von Neumann freedom. This illustrated with cases radiation two-level atom into free space dynamics pure state mixed due interaction dephasing reservoir. Special attention paid...
The structure of the polariton spectrum is analyzed for periodic multiple quantum well structures with periods at or close to Bragg resonance condition wavelength exciton resonance. results obtained used discuss recent reflection and luminescent experiments by M. H\"ubner et al. [Phys. Rev. Lett. 83, 2841 (1999)] that were carried out long structures. It argued discussion a large number wells more appropriate in terms normal modes infinite rather than super- subradiant modes.
We resolve the problem of violation single parameter scaling at zero energy Anderson tight-binding model with diagonal disorder. It follows from symmetry properties Hamiltonian that this spectral point is, in fact, a boundary between two adjacent bands. The states vicinity behave similarly to other band boundaries, which are known violate scaling.