A5090052659- Nonlinear Photonic Systems
- Advanced Fiber Laser Technologies
- Quantum Mechanics and Non-Hermitian Physics
- Quantum chaos and dynamical systems
- Optical Network Technologies
- Random lasers and scattering media
- Quantum optics and atomic interactions
- Nonlinear Waves and Solitons
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Advanced Photonic Communication Systems
- Metamaterials and Metasurfaces Applications
- Thermal properties of materials
- Semiconductor Lasers and Optical Devices
- Laser-Matter Interactions and Applications
- Heat Transfer and Optimization
- Advanced Optical Imaging Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Advanced Fiber Optic Sensors
- Advanced Materials and Mechanics
- Photorefractive and Nonlinear Optics
- Radar Systems and Signal Processing
- Magneto-Optical Properties and Applications
- Thermal Radiation and Cooling Technologies
- Ocean Waves and Remote Sensing
Wesleyan University
2016-2023
Max Planck Institute for Dynamics and Self-Organization
2022
The University of Texas at San Antonio
2022
We employ random matrix theory in order to investigate coherent perfect absorption (CPA) lossy systems with complex internal dynamics. The loss strength γ_{CPA} and energy E_{CPA}, for which a CPA occurs, are expressed terms of the eigenmodes isolated cavity-thus carrying over information about chaotic nature target-and their coupling finite number scattering channels. Our results tested against numerical calculations using networks resonators graphs as cavities.
Abstract Coherent perfect absorption is one of the possibilities to get high but typically suffers from being a resonant phenomena, i.e., efficient only in local frequency range. Additionally, if applied power applications, understanding interplay non-linearities and coherent crucial. Here we show experimentally theoretically formation non-linear proximity exceptional point degeneracies zeros scattering function. Using microwave platform, consisting lossy nonlinear resonator coupled two...
We employ the Random Matrix Theory framework to calculate density of zeroes an $M$-channel scattering matrix describing a chaotic cavity with single localized absorber embedded in it. Our approach extends beyond weak-coupling limit channels and applies for any absorption strength. Importantly it provides insight optimal amount loss needed realize coherent perfect absorbing (CPA) trap. predictions are tested against simulations two types traps: complex network resonators quantum graphs.
We introduce the concept of multichannel Floquet Perfect Absorbers (FPAs) which are periodically modulated lossy interferometric traps that completely absorb incident monochromatic waves. The proposed FPA protocols utilize a engineering approach inflicts variety emerging phenomena and features: reconfigurability perfect absorption (PA) for broad range frequencies wave; PA infinitesimal local losses, via critical coupling with high-Q modes by inducing back-reflection dynamical mirrors.
The application of parity–time (PT) symmetry in optics, especially PT-symmetry breaking, has attracted considerable attention as an approach to controlling light propagation. Here, we report optical limiting by two coupled cavities with a PT-symmetric spectrum reflectionless modes. is related broken PT due light-induced changes one the cavities. Our experimental implementation involves three-mirror resonator alternating layers ZnS and cryolite spectral degeneracy passive demonstrated...
Millimeter-wave (mm-wave) communications and radar receivers must be protected from high-power signals, which can damage their sensitive components. Many of these systems arguably by using photonic limiting techniques, in addition to electronic circuits receiver front-ends. Here we demonstrate, experimentally numerically, a free-space, reflective mm-wave limiter based on multilayer structure involving nanolayer vanadium dioxide VO2, experiences heat-related insulator-to-metal phase...
We propose a conceptual design of optical power limiters with abrupt limiting action and enhanced power-handling capabilities that is based on exceptional point degeneracies (EPDs). The photonic circuit consists two coupled cavities differential <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m1"> <mml:mrow> <mml:mi>Q</mml:mi> </mml:mrow> </mml:math> factors. One the includes Kerr-like nonlinear material. underlying mechanism triggers an transmittance...
We develop a statistical theory of waveform shaping incident waves that aims to efficiently deliver energy at weakly lossy targets which are embedded inside chaotic or disordered enclosures such as body cavities, buildings, vessels, etc. Our approach utilizes the universal features scattering, thus minimizing use information related exact characteristics enclosure. The proposed applies equally well systems with and without time-reversal symmetry will find applications in diverse areas...
We demonstrate that a three-terminal harmonic symmetric chain in the presence of Coriolis force, produced by rotating platform is used to place chain, can produce thermal rectification. The direction heat flow reconfigurable and controlled angular velocity $\mathrm{\ensuremath{\Omega}}$ platform. A simple triangular lattice proposed principle.
We report optical limiting of single 532-nm 6-ns laser pulses by two coupled cavities with a PT-symmetric spectrum reflectionless modes at fluences above 10 mJ/cm 2 . The is related to broken PT symmetry due light-induced changes in one the cavities. At threshold, limiter quickly becomes highly reflective rather than absorbing, thereby protecting itself from laser-induced damage.
The application of parity-time (PT) symmetry in optics, especially PT-symmetry breaking, has attracted considerable attention as a novel approach to controlling light propagation. Here, we report optical limiting by two coupled cavities with PT-symmetric spectrum reflectionless modes. is related broken PT due light-induced changes one the cavities. Our experimental implementation three-mirror resonator alternating layers ZnS and cryolite spectral degeneracy demonstrated measurements single...
Sensitive electronics must be protected from high-power microwave radiation. Here we demonstrate the first working prototype of a free-space reflective mm-wave limiter involving nanolayer phase-change material (vanadium dioxide) incorporated in resonant cavity.