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We show the existence of an inherent handedness (spin) of evanescent-electromagnetic-waves which is fundamentally locked to the direction of propagation (momentum). It is universal and accompanies evanescent waves in total internal reflection, waveguides/fibers and surface-states. The hallmark of the recently discovered quantum spin hall (QSH) state of matter is the existence of electronic surface...
We demonstrate experimentally that hyperbolic metamaterials fundamentally alter dipole-dipole interactions conventionally limited to the near-field. The effect is captured in long-range energy transfer and lifetime reduction of donor emitters due to acceptors placed 100 nm away.
We show the existence of an inherent handedness (spin) of evanescent-electromagnetic-waves which is fundamentally locked to the direction of propagation (momentum). It is universal and accompanies evanescent waves in total internal reflection, waveguides/fibers and surface-states.
We demonstrate experimentally that hyperbolic metamaterials fundamentally alter dipole-dipole interactions conventionally limited to the near-field. The effect is captured in long-range energy transfer and lifetime reduction of donor emitters due to acceptors placed 100 nm away.
We report on the discovery of a unique resonance in moving media, impossible in a stationary system. It leads to giant non-contact fluctuational drag force between moving bodies (giant quantum friction).
We demonstrate simultaneous enhancement in spontaneous emission rate and light extraction from hyperbolic metamaterials embedded with quantum dots using a high contrast grating. Enhancements of twenty-fold in extraction and thirteen-fold in emission rate are observed.
We report preferential emission from ZnO nanoparticles into an epsilon near zero metamaterial. The structure is designed to have the parallel component of its dielectric constant approach zero at the maximum emission wavelength of ZnO.
We introduce a paradigm shift in light confinement strategy and show that light can be confined below the diffraction limit using completely transparent artificial media (metamaterials with εij >1 and μij =1).
Total internal reflection (TIR) is a ubiquitous phenomenon used in photonic devices ranging from waveguides and resonators to lasers and optical sensors. Controlling this phenomenon and light confinement are keys to the future integration of nanoelectronics and nanophotonics on the same silicon platform. We introduced the concept of relaxed TIR, in 2014, to control evanescent waves generated during...
We introduce a paradigm shift in light confinement strategy and show that light can be confined beyond the diffraction limit using transparent artificial media (all-dielectric metamaterials). Our approach controls the optical momentum of evanescent waves — an important electromagnetic property overlooked in photonic devices.
We report on experimental and theoretical results on EELS from 12nm single-crystal gold films. Our results show that momentum resolution of the electrons gives insight into signatures of non-locality and quantum nature of the excitations.
Directional light extraction from high-k modes in a hyperbolic metamaterial (HMM) is demonstrated by direct coupling of resonance cones from quantum dots (QDs) underneath a metal-dielectric composite to a high index bulls-eye grating structure.
Artificial media (metamaterials) have recently emerged as a candidate for engineering light-matter interaction at the nanoscale due to their potential for unconventional electromagnetic responses not found in resonant microcavities or photonic crystals. In spite of the detrimental effects of absorption losses, a few applications such as broadband single photon sources can be efficiently realized using...
We develop fluctuational electrodynamics of hyperbolic metamaterials (HMMs) and establish broadband near-field thermal emission beyond the black-body limit. We predict thermal topological transitions in phonon-polaritonic HMMs paving the way for near-field thermal engineering using metamaterials.
Contrary to popular assumption, we show that all-dielectric metamaterials ε> 1, μ = 1 can be used to strongly confine light. This leads to a new class of lossless waveguides capable of dense photonic integration.
We introduce a class of artificial media: high temperature Epsilon-near-Pole metamaterials consisting of plasmonic materials with high melting point and show that they can be used as efficient narrowband omnidirectional thermal emitters in thermophotovoltaic systems.
We propose an approach for controlling Wein's displacement law in the near-field leading to a narrowband, tunable, spatially-coherent high temperature thermal source. Our approach utilizes engineered plasmonic states of metals with a high melting point.
Single photon emission near hyperbolic metamaterials is enhanced into highly directional resonance cones tunable across the optical spectrum. Power from these resonance cones is extracted into highly directional emission via a bullseye grating.
We deomonstrate the existence of optical topological transition, the optical equivalent of Lifshitz transition in electronic systems, by controlling the topology of the optical isofrequency curve using metamaterials.
We propose a metamaterial device capable of highly directional thermal radiation using the Wolf effect. Our structure provides high emissivity in a narrow band and is tunable over a broad range of frequencies.
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