A5060426875- Photonic Crystals and Applications
- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Thermal Radiation and Cooling Technologies
- Advanced Fiber Laser Technologies
- Metamaterials and Metasurfaces Applications
- Neural Networks and Reservoir Computing
- Topological Materials and Phenomena
- Nonlinear Photonic Systems
- Optical Network Technologies
- Quantum optics and atomic interactions
- Strong Light-Matter Interactions
- Quantum Information and Cryptography
- Mechanical and Optical Resonators
- Optical Coatings and Gratings
- Gold and Silver Nanoparticles Synthesis and Applications
- Orbital Angular Momentum in Optics
- solar cell performance optimization
- Laser-Matter Interactions and Applications
- Quantum Electrodynamics and Casimir Effect
- Nonlinear Dynamics and Pattern Formation
- Advanced Thermodynamics and Statistical Mechanics
- Terahertz technology and applications
- Graphene research and applications
- Quantum and electron transport phenomena
IIT@MIT
2016-2025
Massachusetts Institute of Technology
2016-2025
Cambridge Electronics (United States)
2019-2025
The NSF AI Institute for Artificial Intelligence and Fundamental Interactions
2025
Institute for Soldier Nanotechnologies
2011-2023
Moscow Institute of Thermal Technology
2007-2023
Vassar College
2019-2022
University of California, Santa Barbara
2022
Virginia Tech
2022
IBM (United States)
2022
Using self-resonant coils in a strongly coupled regime, we experimentally demonstrated efficient nonradiative power transfer over distances up to 8 times the radius of coils. We were able 60 watts with approximately 40% efficiency excess 2 meters. present quantitative model describing transfer, which matches experimental results within 5%. discuss practical applicability this system and suggest directions for further study.
We point out that plasmons in doped graphene simultaneously enable low-losses and significant wave localization for frequencies below of the optical phonon branch $\hbar\omega_{Oph}\approx 0.2$ eV. Large plasmon losses occur interband regime (via excitation electron-hole pairs), which can be pushed towards higher doping values. For sufficiently large dopings, there is a bandwidth from $\omega_{Oph}$ up to threshold, where decay channel via emission an together with pair nonegligible. The...
We point out that electromagnetic one-way edge modes analogous to quantum Hall states, originally predicted by Raghu and Haldane in 2D photonic crystals possessing Dirac point-derived band gaps, can appear more general settings. show the TM a gyromagnetic crystal be formally mapped electronic wave functions periodic field, so only requirement for existence of is Chern number all bands below gap nonzero. In square-lattice yttrium-iron-garnet operating at microwave frequencies, which lacks...
In 1929, Hermann Weyl derived the massless solutions from Dirac equation - relativistic wave for electrons. Neutrinos were thought, decades, to be fermions until discovery of neutrino mass. Moreover, it has been suggested that low energy excitations in condensed matter can Hamiltonian. Recently, photons have also proposed emerge as particles inside photonic crystals. all cases, two linear dispersion bands three-dimensional (3D) momentum space intersect at a single degenerate point point....
Optical bound states in the continuum (BICs) have recently been realized photonic crystal slabs, where disappearance of out-of-plane radiation turns leaky resonances into guided modes with infinite lifetimes. We show that such BICs are vortex centers polarization directions far-field radiation. They carry conserved and quantized topological charges, defined by winding number vectors, which ensure their robust existence govern generation, evolution, annihilation. Our findings connect...
We propose a method to use artificial neural networks approximate light scattering by multilayer nanoparticles. find that the network needs be trained on only small sampling of data simulation high precision. Once is trained, it can simulate such optical processes orders magnitude faster than conventional simulations. Furthermore, used solve nanophotonic inverse design problems using back propagation, where gradient analytical, not numerical.
We demonstrate how slow group velocities of light, which are readily achievable in photonic-crystal systems, can dramatically increase the induced phase shifts caused by small changes index refraction. Such increased sensitivity may be used to decrease sizes many devices, including switches, routers, all-optical logical gates, wavelength converters, and others. At same time a low velocity greatly decreases power requirements needed operate these devices. show advantages design switches...
Topological photonic states, inspired by robust chiral edge states in topological insulators, have recently been demonstrated a few systems, including an array of coupled on-chip ring resonators at communication wavelengths. However, the intrinsic difference between electrons and photons determines that protection time-reversal-invariant systems does not share same robustness as its counterpart electronic insulators. Here, designer surface plasmon platform consisting tunable metallic...
Electromagnetic resonators strongly coupled through their near-fields [A. Karalis, J. D. Joannopoulos, and M. Soljačić, Ann. Phys. 323, 34 (2008); A. Kurs, R. Moffatt, P. Fisher, Science 317, 83 (2007)] are able to achieve efficient wireless power transfer from a source device separated by distances multiple times larger than the characteristic sizes of resonators. This midrange approach is therefore suitable for remotely powering several devices single source. We explore effect adding on...
We demonstrate and distinguish experimentally the existence of a special type Fano resonances at k≈0 in macroscopic two-dimensional photonic crystal slab. fabricate square lattice array holes silicon nitride layer perform an angular resolved spectral analysis various resonances. elucidate their radiation behavior using temporal coupled-mode theory symmetry considerations. The unique simplicity this system whereby ultralong lifetime delocalized electromagnetic field can exist above surface...
Abstract Graphene plasmons have been found to be an exciting plasmonic platform, thanks their high field confinement and low phase velocity, motivating contemporary research revisit established concepts in light–matter interaction. In a conceptual breakthrough over 80 years old, Čerenkov showed how charged particles emit shockwaves of light when moving faster than the velocity medium. To modern eyes, effect offers direct ultrafast energy conversion scheme from charge photons. The requirement...
Exploring photonic topology Scattering topological effects are being explored in a variety of electronic and optical materials systems owing to their robustness against defects (see the Perspective by Özdemir). Yang et al. designed fabricated an ideal analog three-dimensional Weyl system. Angular transmission measurements revealed four points at same energy, as well signature helicoidal arcs associated with such exotic Zhou theoretically proposed experimentally demonstrated formation...
Despite great interest in the quantum anomalous Hall phase and its analogs, all experimental studies electronic bosonic systems have been limited to a Chern number of one. Here, we perform microwave transmission measurements bulk at edge ferrimagnetic photonic crystals. Band gaps with large numbers 2, 3, 4 are present results, which show excellent agreement theory. We measure mode profiles Fourier transform them produce dispersion relations modes, whose direction match our calculations.