A5010975356- Plasmonic and Surface Plasmon Research
- Fluid Dynamics and Turbulent Flows
- Metamaterials and Metasurfaces Applications
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Advanced Fiber Laser Technologies
- Computational Fluid Dynamics and Aerodynamics
- Photorefractive and Nonlinear Optics
- Quantum optics and atomic interactions
- Advanced Antenna and Metasurface Technologies
- Plasma and Flow Control in Aerodynamics
- Laser-Matter Interactions and Applications
- Gas Dynamics and Kinetic Theory
- Aerodynamics and Fluid Dynamics Research
- Orbital Angular Momentum in Optics
- Fluid Dynamics and Vibration Analysis
- Aerodynamics and Acoustics in Jet Flows
- Spacecraft and Cryogenic Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
- Random lasers and scattering media
- Meteorological Phenomena and Simulations
- Microstructure and mechanical properties
- Material Properties and Failure Mechanisms
- Differential Equations and Numerical Methods
- Antenna Design and Analysis
Purdue University West Lafayette
2013-2024
Quantum Science Center
2024
Oak Ridge National Laboratory
2024
Moscow Institute of Physics and Technology
2002-2023
Moscow Power Engineering Institute
2020-2023
Moscow Aviation Institute
2020-2023
Institute of Physics and Technology
2013-2023
State Street (United States)
2015-2020
Central Aerohydrodynamic Institute
2016-2017
Russian Quantum Center
2014
New propagation regimes for light arise from the ability to tune dielectric permittivity extremely low values. Here, we demonstrate a universal approach based on linear values attained in ε-near-zero (ENZ) regime enhancing nonlinear refractive index, which enables remarkable light-induced changes of material properties. Experiments performed Al-doped ZnO (AZO) thin films show sixfold increase Kerr index (n_{2}) at ENZ wavelength, located 1300 nm region. This turn leads ultrafast order unity,...
Optical properties of metal nanowires and nanowire composite materials are studied. An incident electromagnetic wave can effectively couple to the propagating surface plasmon polariton (SPP) modes in resulting very large local fields. The excited SPP depend on structure their orientation with respect radiation. A percolation is shown have a broadband spectrum localized modes. We also show that arranged into parallel pairs act as left-handed material effective magnetic permeability dielectric...
Materials with a spatially uniform but temporally varying optical response have applications ranging from magnetic field-free isolators to fundamental studies of quantum field theories. However, these effects typically become relevant only for time variations oscillating at frequencies, thus presenting significant hurdle that severely limits the realization such conditions. Here we present thin-film material permittivity pulsates (uniformly in space) frequencies and realizes time-reversing...
Abstract Nanophotonics and metamaterials have revolutionized the way we think about optical space ( ɛ , μ ), enabling us to engineer refractive index almost at will, confine light smallest of volumes, manipulate signals with extremely small footprints energy requirements. Significant efforts are now devoted finding suitable materials strategies for dynamic control properties. Transparent conductive oxides exhibit large ultrafast nonlinearities under both interband intraband excitations. Here...
The conversion of a photon’s frequency has long been key application area nonlinear optics. It discussed how slow temporal variation material’s refractive index can lead to the adiabatic shift (AFS) pulse spectrum. Such rigid spectral change relevant technological implications, for example, in ultrafast signal processing. Here, we investigate AFS process epsilon-near-zero (ENZ) materials and show that be achieved shorter length if operating vicinity <mml:math...
Recent advances in ultrafast, large-modulation photonic materials have opened the door to many new areas of research. One specific example is exciting prospect time crystals. In this perspective, we outline most recent material that are promising candidates for We discuss their merit terms modulation speed and depth. also investigate challenges yet be faced provide our estimation on possible roads success.
Plasmonics has brought revolutionary advances to laser science by enabling deeply subwavelength nanolasers through surface plasmon amplification. However, the impact of plasmonics on other promising systems so far remained elusive. Here, we present a class random lasers enabled three-dimensional plasmonic nanorod metamaterials. While dense metallic nanostructures are usually detrimental performance due absorption losses, here lasing threshold keeps decreasing as volume fraction metal is...
We report the simultaneous increase of both nonlinear Kerr coefficient n 2 and third-order susceptibility χ (3) in aluminum zinc oxide (AZO) attained by pumpprobe spectroscopy a frequency degenerate configuration.Our experiments demonstrate 6-fold enhancement over one order magnitude coefficient, while also determining two distinct operational wavelengths for optimal modulation either real or imaginary part complex refractive index.These results, besides providing broader spectral...
The ultrafast changes of material properties induced by short laser pulses can lead to a frequency shift reflected and transmitted radiation. Recent reports highlight how such is enhanced in spectral regions where the features near-zero real part permittivity. Here, we investigate for fields generated four-wave mixing. In our experiment, observed more than 60 nm (compared pulse width ∼40 nm) phase conjugated radiation 500 aluminium-doped zinc oxide (AZO) film pumped close epsilon-near-zero...
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTTransdimensional PhotonicsAlexandra Boltasseva*Alexandra BoltassevaSchool of Electrical & Computer Engineering and Birck Nanotechnology Center, Purdue University, 1205 West State Street, Lafayette, Indiana 47907, United StatesMore by Alexandra Boltassevahttp://orcid.org/0000-0002-5988-7625 Vladimir M. ShalaevVladimir ShalaevSchool ShalaevCite this: ACS Photonics 2019, 6, 1, 1–3Publication Date (Web):January 16, 2019Publication History Received13...
Three flow problems are discussed whose solutions suggest control schemes. These 1) unsteady hypersonic over bodies in the Newtonian approximation, 2) a mechanism of stabilization acoustically semi-transparent walls and 3) store separation from cavities. Simplified systematic approximations based on asymptotic frameworks lead to compact computational models that elucidate structure opportunities for control. Besides generalizing steady model Cole, approximation context shows body...
Abstract The study of conductive oxides has gained momentum within the photonics community due to their unique linear and nonlinear optical properties. Despite recent experiments reporting on high harmonic generation from thin films, optical/electronic behavior these compounds at nanoscale is still not fully understood lack a suitable theoretical model. In present work, aluminum zinc oxide excited near its epsilon‐near‐zero crossing point using incident femtosecond pulses having peak power...
Single photon emitters (SPEs) in hexagonal boron nitride (hBN) are elementary building blocks for room-temperature on-chip quantum photonic technologies. However, fundamental challenges, such as slow radiative decay and nondeterministic placement of the emitters, limit their full potential. Here, we demonstrate large-area arrays plasmonic nanoresonators (PNRs) Purcell-induced SPEs by engineering emitter-cavity coupling enhancing emission. Gold-coated silicon pillars with an alumina spacer...
Historically, the methods used to describe electromagnetic response of random, three-dimensional (3D), metal-dielectric composites (MDCs) have been limited approximations such as effective-medium theories that employ easily-obtained, macroscopic parameters. Full-wave numerical simulations finite-difference time domain (FDTD) calculations are difficult for random MDCs due fact nanoscale geometry a composite is generally ascertain after fabrication. We developed fabrication method creating...
Ultrathin metamaterial layers are modeled by a homogeneous bi-anisotropic film to represent various kinds of broken symmetries in photonic nanostructures, and specifically optical metamaterials metasurfaces. Two algorithms were developed obtain the electromagnetic (EM) wave response from metasurface (direct solver) or parameters EM (inverse for bi-anisotropic, subwavelength-thick nanostructured film. The algorithm is applied two different metasurfaces retrieve their effective parameters....
Abstract Transparent conducting oxides exhibit giant optical nonlinearities in the near-infrared window where their linear index approaches zero. Despite magnitude and speed of these nonlinearities, a “killer” application for compounds has yet to be found. Because absorptive nature typically used intraband transitions, out-of-plane configurations with short paths should considered. In this direction, we propose an alternative frequency-resolved gating scheme characterization ultra-fast...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Zhengtong Liu, Mark D. Thoreson, Alexander V. Kildishev, Vladimir M. Shalaev; Translation of nanoantenna hot spots by a metal-dielectric composite superlens. Appl. Phys. Lett. 20 July 2009; 95 (3): 033114. https://doi.org/10.1063/1.3176975 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends...
A wavelength shift of 15 nm is obtained for near-infrared (1250 nm) pulses interacting with a temporally engineered Al-doped-ZnO layer. The underlying time-refraction process driven by an intense, <100 fs pulse at 785 nm.
Abstract Transparent conducting oxides (TCOs) show unprecedented optical nonlinearities in the near infrared wavelength range, where real part of their linear refractive index approaches zero. More specifically, Kerr these materials have sparked widespread attention due to magnitude and speed. However, absorptive nature nonlinear processes, it is fundamental interest further investigate imaginary component index. The present work studies absorption properties aluminium‐doped zinc oxide (AZO)...
Vertical and pitching motions (two degrees of freedom) a thin body revolution separating from rectangular cavity in subsonic stream are investigated using combined asymptotic numerical methods. The analysis is based on explicit analytical solutions for the lift force moment obtained our previous studies. Body trajectory dependencies initial conditions, parameters, freestream velocity studied. problem divided into three phases motion. In phase 1, inside cavity. 2, crosses shear layer, 3,...