Mikhail I. Shalaev

Duke University | DU · Department of Electrical and Computer Engineering (ECE)

We design and realize chalcogenide-based photonic quasicrystals enabling simultaneous phase matching of an arbitrary number of nonlinear optical processes in a single engineered nanostructure.

Topological photonic insulators can enable the development of efficient integrated photonic devices with minimized scattering losses. The optical properties of the majority of topological structures proposed to date are fixed by designs such that no changes to their performance can be made once the device has been fabricated. However, tunability is...

Orbital angular momentum (OAM) beams may create a new paradigm for the future classical and quantum communication systems. A majority of existing OAM beam converters are bulky, slow, and cannot withstand high powers. Here, we design and experimentally demonstrate an ultra-fast, compact chalcogenide-based all-dielectric metasurface beam converter wh...

Topological photonic insulators pave the way toward efficient integrated photonic devices with minimized scattering losses. Optical properties of the majority of topological structures proposed to date are fixed by design such that no changes to their performance can be made once the device has been fabricated. However, tunability is important for...

Photonic topological insulators offer the possibility to eliminate backscattering losses and improve the efficiency of optical communication systems. Despite considerable efforts, a direct experimental demonstration of theoretically predicted robust, lossless energy transport in topological insulators operating at near-infrared frequencies is still...

In the version of this Letter originally published, Fig. 5g in the Supplementary Information was missing the scale bar. This has now been corrected.

Ultra-compact, low-loss, fast, and reconfigurable optical components, enabling manipulation of light by light, could open numerous opportunities for controlling light on the nanoscale. Nanostructured all-dielectric metasurfaces have been shown to enable extensive control of amplitude and phase of light in the linear optical regime. Among other func...

Ultra-compact, low-loss, fast, and reconfigurable optical components, enabling manipulation of light by light, could open numerous opportunities for controlling light on the nanoscale. Nanostructured all-dielectric metasurfaces have been shown to enable extensive control of amplitude and phase of light in the linear optical regime. Among other func...

We design and experimentally demonstrate silicon-based topological valley-Hall photonic crystals, that are compatible with current semiconductor technologies and operate at near-infrared frequencies. Robust and reflection-less light propagation around sharp turns is demonstrated both theoretically and experimentally. This work is an important step...

We evaluate the suitability of chalcogenide glass films, of interest because of their exceptionally high optical nonlinearities, for applications in metasurface devices and discuss results for a chalcogenide film-based optical beam converter.

Photonic topological insulators provide unprecedented possibilities to eliminate scattering losses and improve the efficiency of optical communication systems. Despite significant theoretical efforts, the experimental demonstration of an integrated photonic topological insulator operating in the telecommunication regime was still missing. Here, we...

Topological insulators are materials that conduct on the surface and insulate in their interior due to non-trivial topological order. The edge states on the interface between topological (non-trivial) and conventional (trivial) insulators are topologically protected from scattering due to structural defects and disorders. Recently, it was shown tha...

We show a nonlinear metasurface made of nanostructured chalcogenide glass. We combined on- and off-resonance nanostructures to realize reconfigurable structured light that switches between Hermit-Gaussian and vortex shape depending on its intensity.

Structured light has attracted significant interest in applications ranging from optical manipulation to imaging. We discuss theoretical and experimental studies of linear and nonlinear interactions of singular beams in solid, liquid and gaseous engineered media.

We discuss fundamental optical phenomena at the interface of singular and nonlinear optics in engineered optical media and show that the unique optical properties of metamaterials and metasurfaces open unlimited prospects to “engineer” light itself.

A metamaterial hyperlens offers a unique solution to overcome the diffraction limit by transforming evanescent waves responsible for imaging subwavelength features of an object into propagating waves. However, the first realizations of optical hyperlenses were limited by a narrow working bandwidth and significant resonance-induced loss. Here, we re...

We show that unique optical properties of metamaterials open unlimited prospects to “engineer” light itself. For example, we demonstrate a novel way of complex light manipulation in few-mode optical fibers using metamaterials highlighting how unique properties of metamaterials, namely the ability to manipulate both electric and magnetic field compo...

Metasurfaces are two-dimensional optical structures enabling complete control of the amplitude, phase, and polarization of light. Unlike plasmonic metasurfaces, planar silicon structures facilitate high transmission, low losses and compatibility with existing semiconductor technologies. Here, we report an experimental demonstration of high-efficien...

Here we report an experimental demonstration of high-efficiency all-dielectric metasurfaces with full phase control of 360 degrees in transmission mode at telecommunication wavelengths. Silicon-based metasurfaces can be used for fabrication of miniaturized optical components for near-infrared photonics, such as flat lenses, beam deflectors anti-ref...

A non-resonant hyperlens operating in the visible wavelength range is demonstrated experimentally. Non-resonant indefinite properties, enabling low-loss, broadband sub-wavelength imaging, were realized using a fan-like structure made using a combination of top-down and bottom-up techniques.

A metamaterial hyperlens offers a unique solution to overcome the diffraction limit by transforming evanescent waves responsible for imaging subwavelength features of an object into propagating waves. However, the first realizations of optical hyperlenses were limited by a narrow working bandwidth and significant resonance-induced loss. Here, we re...

Recent progress in the field ofmetamaterials is likely to revolutionize both of the linear and nonlinear optics. The unique properties of metamaterials, including negative index of refraction, magnetism at optical frequencies, and anti-parallel phase and energy velocities were shown to fundamentally change many nonlinear lightmatter interactions. I...

Recent developments in the field of metamaterials have revealed unparalleled opportunities for 'tailoring' space for light propagation, opening a new paradigm in spin- and quantum-related phenomena in optical physics. We show that unique optical properties of metamaterials open unlimited prospects to 'tailor' light itself.

Extraordinary properties of nonlinear-optical propagation processes are investigated that involve electromagnetic or elastic waves with negative group velocity. Nanostructured materials that support such waves and prospective unique photonic devices are described.

Opposite directionality of the Poynting vector and the wave vector, an inherent property of negative index metamaterials (NIMs), was predicted to enable backward phase-matching condition for a second harmonic generation (SHG) process. As a result, such a nonlinear negative index slab acts as a nonlinear mirror. In this Letter, we predict that SHG w...

Extraordinary properties of nonlinear-optical propagation processes are investigated which involve electromagnetic or elastic waves with negative group velocity. Nanostructured materials that support such waves are described. Nonlinear-optical energy transfer between contra-propagating short pulses are investigated and prospective unique photonic d...

We discuss the backward phase-matched process in negative index metamaterials with quadratic nonlinearity, resulting in generation of a backward propagating vortex with simultaneously doubled frequency, orbital angular momentum and reversed rotation direction of the wavefront.

A concept of a family of unique backward-wave photonic devices, such as frequency up and down converting nonlinear-optical mirrors, sensors, modulators, filters and amplifiers is proposed. Novel materials are considered, which support coexistence of ordinary and backward waves and thus enable enhanced nonlinear-optical frequency-conversion processe...

A possibility to greatly enhance frequency-conversion efficiency of stimulated Raman scattering is shown by making use of extraordinary properties of three-wave mixing of ordinary and backward waves. Such processes are commonly attributed to negative-index plasmonic metamaterials. This work demonstrates the possibility to replace such metamaterials...

Novel concepts of nonlinear-optical (NLO) photonic metamaterials (MMs) are proposed. They concern with greatly enhanced coherent NLO energy exchange between ordinary and backward waves (BWs) through the frequency-conversion processes. Two different classes of materials which support BWs are considered: crystals that support optical phonons with neg...

Extraordinary properties of nonlinear-optical propagation processes in double-domain positive/negative phase velocity metamaterials such as second harmonic generation, three- and four-wave frequency conversion and optical parametric amplification are reviewed. Novel types of materials are proposed.

Novel concepts of nonlinear-optical (NLO) photonic metamaterial are proposed. They concern photonic materials that support backward electromagnetic or vibration waves (BWs) and provide coherent nonlinear-optical energy exchange between ordinary and BWs as applied to three- and four-wave mixing processes. Three different classes of materials which s...

A family of switching photonic devices and amplifiers are proposed which mimic and utilize extraordinary coherent nonlinear-optical frequency conversion processes commonly attributed to plasmonic metamaterials.

Extraordinary features of optical parametric amplification of Stokes electromagnetic waves are investigated, which originate from three-wave mixing of two ordinary electromagnetic and one backward phonon wave with negative group velocity. A similarity with the counterpart in the negative-index plasmonic metamaterials and differences with those util...

We show that the medium length required for coherent energy transport from strong electromagnetic field to contra-propagating Stokes signal can be significantly reduced and the conversion efficiency sharply increased by means of three-wave mixing with optical phonons having negative group velocity. Such localization depends resonantly on the intens...