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We present a new optical phase retrieval method using the conical refraction imaging in structured media, which enables a single simultaneous measurement of multiple images and allows a stable recovery of the optical phase.
We present a new approach to super-resolution optical imaging, based on structured illumination in hyperbolic media that support subwavelength optical patterns. The proposed system has planar geometry, offers unlimited field of view, and is robust with respect to optical noise and material losses.
We report a perfect absorber utilizing the guided resonance of a hypercrystal. Because a hypercrystal confines light to a deeply subwavelength thickness, it operates as a metasurface, providing the required surface conductivity for unity absorption.
We present a new approach to super-resolution optical imaging, based on structured illumination in hyperbolic media. The proposed system allows for planar geometry, has unlimited field of view, and is robust with respect to optical noise and material losses.
Photonic hypercrystals represent a new class of artificial optical composites, that has the properties of both the metamaterials and the photonic crystals, as well as some new features not found in these media. In particular, the hypercrystals support an even number of Dirac dispersion cones that originate from the Motti topological transition. The resulting singularity in the photonic density of...
We present an optical imaging system based on photonic hypercrystal, an artificial optical medium combining the properties of hyperbolic materials and photonic crystals. This system functions as a negative refraction lens with substantially reduced image aberrations.
We demonstrate that Dirac dispersion cones in photonic hypercrystals originate from an optical topological transition. The resulting singularity in the photonic density of states has a strong effect on the emissivity of the hypercrystal.
We demonstrate a novel artificial optical material, a “photonic hyper-crystal”, which combines properties of hyperbolic metamaterials and photonic crystals. It is based on cobalt nanoparticle ferrofluid subjected to magnetic field.
We introduce a new “universality class” of artificial optical media - photonic hypercrystals. These hyperbolic metamaterials with periodic spatial variation of dielectric permittivity on subwavelength scale, combine the features of optical metamaterials and photonic crystals.
Using the methods of the information theory, we derive the fundamental limit to the resolution of optical imaging, and demonstrate that in the far-field, contrary to the conventional wisdom, it is not equal or close to one half of the wavelength.
Metamaterials with hyperbolic dispersion (where two eigenvalues of the dielectric permittivity tensor have opposite signs) exhibit a broad bandwidth singularity in the photonic density of states, with resulting manifestations in a variety of phenomena, from spontaneous emission to light propagation and scattering. In this tutorial, I will review some of the recent developments in this field.
We describe a novel resonance in planar hyperbolic metamaterials. In conventional Fabry-Perot mode numbering, the resonance corresponds to 0-th order, and can be observed in planar hyperbolic media with arbitrary small thickness.
We demonstrate that the broadband divergence of the photonic density of states in hyperbolic metamaterials leads to giant increase in radiative heat transfer, beyond the limit set by the Stefan-Boltzmann law. The resulting radiative thermal “hyper-conductivity” may approach the heat conductivity via electrons and phonons in regular solids.
We show that there is an infinite local-density-of-states in the near-field of a hyperbolic metamaterial. This leads to channeling of spontaneous emission into resonance cones of metamaterial states opening the route to quantum-optics with metamaterials.
Using the broadband “super-singularity” in the density of states of (meta) materials with hyperbolic dispersion, we demonstrate, both theoretically and experimentally, a new concept of radiation-absorbing systems.
We demonstrate the decrease in the spontaneous emission lifetime of dye molecules due to the enhanced photonic density of states (PDOS) of a hyperbolic metamaterial (HMM), opening the route to PDOS engineered HMM devices.
We propose a new approach to the broadband Purcell effect based on metamaterials with hyperbolic dispersion. Highly directional emission and dramatic reduction in spontaneous-emission lifetime due to the singularity in density-of-states leads to many interesting applications‥
We show that (meta)materials with hyperbolic dispersion exhibit a broad bandwidth singularity in the photonic density of states. As opposed to an isolated singularity found in other physical systems, with the finite density of states in its vicinity, for the systems with hyperbolic dispersion the photonic density of states diverges at every frequency over a finite bandwidth. This behavior leads to...
We develop an imaging system capable of magnification, subwavelength-resolution and impedance matching, which minimizes reflection losses. We propose a practical design of the system based on available materials and existing fabrication technologies.
We present a novel transmission system using self-wrapped WHTS OCDM signals to achieve enhanced transmission security. Distributed key is encoded and time-spread to hide under noise in the network. BER of 10-4 is demonstrated experimentally.
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