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Loss in the metal is the main factor restricting practicality of plasmonic and metamaterial devices. In this tutorial the inevitability of the loss, its physical origins and the means to mitigate it will be considered
Near-infrared epsilon-near-zero metamaterial slabs based on Ag-Ge multilayers are experimentally demonstrated and numerically analyzed. A post-annealing process and multilayer grating structures are introduced to reduce the optical loss and also tune the epsilon-near-zero wavelength.
Far field characterization of light propagation in metamaterial with multi metal-dielectric layers is performed by introducing rough surface and nano grating structures. Light directional imaging and evanescent wave moiré fringes are observed in experiments.
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.
Opto-mechanical phenomena on nano-scale change balance between macroscopic forces and introduce novel quantum effects. Manipulation and control over nano-objects dynamics with plasmonics and metamaterials emphasizing radiation reaction recoil and all-optical modulation will be discussed.
We present the design and realization of strong light-matter coupling in monolithic metamaterial nanocavities. We achieve a Rabi frequency of 2.5 THz (corresponding to a polariton splitting of 20%) in a mode volume of 1.34×10−3(λ/n)3.
We introduce a helix-based metamaterial, a circular polarization converter, composed of pairs of oppositely-handed helices on a square array. We compare our theoretical findings to measurements on samples made by laser lithography and electroplating.
A Huygens' surface that efficiently refracts normally incident light to an angle φr = 35° at telecommunication wavelengths is reported. This represents the first experimental demonstration of an isotropic metasurface that provides wavefront control for arbitrarily polarized light.
We demonstrate a liquid metal-based reconfigurable terahertz metamaterial device that is not only pressure driven, but also exhibits pressure memory. The discrete response is obtained by injecting eutectic gallium indium into a microfluidic structure.
We experimentally demonstrate both the lifetime reduction and the enhancement of single-photon emission from nitrogen-vacancies in nanodiamonds coupled to a TiN/Al0.6Sc0.4N superlattice. Our results pave the way towards future CMOS-compatible integrated quantum sources.
The inclusion of an emitter inside a Ag/Si multilayer yields a 3-fold enhancement of the Purcell factor over its outer value. The radiation is outcoupled to the far-field via a triangular and a rectangular grating.
Interference, one of the major physical phenomena, relies on coherent superposition of waves, undertaking different phase lag. Considering vectorial near-fields structure, the fundamental concept was reconsidered, reformulated, and demonstrated at optical and radio frequencies.
We proposed a novel meta-structure of gold/graphene trimers and realized ultrasfast and ultra-low power all-optical tunable plasmon-induced transparency around 1150 nm. The nonlinear susceptibility of graphene/ITO film was up to 2.90×10−5 esu.
We present a tunable hyperbolic metamaterial by exploiting the metal-insulator phase transition in vanadium oxide and demonstrate the transition of its in-plane dielectric constant from positive to negative value by temperature control.
We demonstrate the first reconfigurable photonic metamaterial controlled by electrical currents and magnetic fields, providing first practically useful solutions for sub-megahertz and high contrast modulation of metamaterial optical properties.
Using a metamaterial composite, we demonstrate a bandpass filter that has only a single transmission mode from 0 to >25 THz. This usable bandwidth matches, or exceeds, that of currently used THz sources.
We experimentally demonstrate a dielectric metamaterial comprising silicon nanofins on a glass substrate. Left- and right-circularly polarized beams incident upon the device are deflected into different directions. Our approach avoids the efficiency issues of plasmonics.
In this work, we theoretically and numerically demonstrate several new plasma filament-based structures used for increasing the angular and range resolution of microwave radar systems, and show that they can survive in adverse environments.
We theoretically demonstrate superior degree of control over volume plasmon polariton propagation and the Purcell effect in multi-period (4-layer unit cell) plasmonic multilayers, which can be viewed as multiscale hyperbolic metamaterials or multi-periodic photonic hyper-crystals.
The optical nonlocalities in metal-dielectric multilayer metamaterials are characterized as functions of incident angles for different polarizations. The measured epsilon-near-zero frequency shifts due to nonlocal effects agree with the theoretical analysis developed from transfer-matrix method.
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