Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
We demonstrate the first addressable reconfigurable photonic metamaterials thus enabling control over optical material properties with simultaneous spatial and temporal resolution. Potential applications of random access metadevices include active focusing, beam steering, dynamic transformation optics and video hologr…
The construction is proposed of the hyperbolic metamaterial for an optical spectral range with the expanded working range of wavelength due to periodic system of nanorods in a definite range of diameters and heights. The construction is fulfilled on aluminum-oxide ceramics with the periodic system of nanoholes with th…
We present a method for calculating the plasmonic and photonic enhancement of the absorption in solar cells. The method involves coupling between a transfer matrix method to describe light propagation in the layered stack and Mie theory for calculating the absorption and angular scattered field distribution from the n…
It has been recently shown that a metasurface presenting a phase-gradient can be effectively used as a partially reflecting surface (PRS) in a Fabry-Perot leaky wave antenna to produce beam steering. The aim of the present contribution is to develop and present an analytical model which will allow us to predict the an…
The experimental demonstration of the total absorption of electromagnetic P-waves impinging on a low-loss dielectric thin layer covering a patterned metallic surface is here reported. A semi-analytical model has been employed to design a metallic grating of coaxial cavities that enhances the absorbing properties of th…
We present a bottom-up approach to fabricate single active optical antennas as well as antenna arrays consisting of semiconductor quantum dots and plasmonic nanostructures. It is based on a two-step lithographic process in combination with chemical functionalization of the substrate and allows for the deposition of qu…
We present the design and experimental results of near-field scanning microwave impedance microscopy (MIM). By sending the excitation 1GHz signal to a shielded cantilever probe and detecting the reflected signal, the MIM electronics measure the real and imaginary components of the tip-sample admittance to form the cor…
The conditions are found for the existence of Bessel plasmon-polaritons (BPPs) at the boundary of an epsilon-near-zero (ENZ) metamaterial formed from array of metal nanocylinders embedded into dielectric matrix. It is shown that BPP is a new type of surface plasmonic field, namely, cylindrically symmetric interference…
This work is devoted to the numerical calculation of the effective constitutive parameters of the carpet cloaking device and to the numerical simulation of this cloak in COMSOL Multiphysics software for the terahertz frequency range. Two different types of cloak low boundary curvature were considered.
We introduce a metamaterial for realizing true electromagnetically induced transparency (EIT) in analogy to atomic EIT effect. In the metamaterial, two resonant modes oscillating at different resonant frequencies are coupled through three-wave mixing in the presence of an auxiliary wave, and sharp transparency attribu…
In this paper, we propose a novel approach based on the mantle cloaking method to reduce the mutual coupling between closely spaced planar antennas. We consider two microstrip-fed monopole antennas resonating at slightly different frequencies and show that by covering each antenna with a conformal elliptical metasurfa…
Angular reflection spectra of 1D arrays of grooves in a metal film in the Kretschmann configuration has been studied numerically. The case of a wave incident in the plane parallel to the grooves has been considered. For the s-polarized incident wave two types of features in the reflection spectra occur: the first is a…
Unique electrodynamic response of graphene results in a manifestation of an unusual transverse-electric (TE) plasmons near the spectral onset of interband transitions. However, excitation and further detection of TE plasmons supported by graphene is challenging for they are extremely sensitive to excitation environmen…
Whispering gallery modes (WGMs) have ultra-high quality factor but only non-directional light emission property. We suggest a novel way to restore WGM in resonant cavity of deformed boundary shape with Transformation optics. Conformal mapping make it possible with only density controlled isotropic material. FEM and mi…
Missiles and fighter jets that travel at a speed much higher than the speed of sound experience highly elevated temperatures due to air friction. Conventional anti-reflection coating designs based on heterogeneous materials may not be well suited to these applications as a variety of temperature-induced problems degra…
Active or intelligent materials whose properties are governed by an external stimulus have been used for many application including memories, opto-electronic devices, smart windows, drug delivery, bio-analytics, and surgery, amongst others. Not only transition metal oxides, semiconductors, and smart polymers have been…
An efficient numerical method is developed to analyze light transmission through subwavelength apertures in metallic films, where the apertutres can have arbitrary cross sections and be surrounded by many grooves. The method is tailor-made for three-dimensional structures that are layered in different regions. It reli…
Measurements of the negative optical phase shifts of Ag/TiO 2 and Ag/SiO 2 bilayer films have been carried out with the modified walk-off interferometer. Appearance and monotonic rise of the phase shift anisotropy for p- and s-polarization by increasing incidence angle has been revealed experimentally. The results of…
We theoretically and experimentally demonstrate that by utilizing a new freedom introduced by spatial dispersions in the effective parameters, Brewster effect can be extended from a single angle to a range of angles, enabling wide-angle impedance matching and total transmission of light through the surface. By designi…
A flat, focusing, metamaterial lens, operating at 60 GHz was designed using 3-layer elements consisting of metallic bars and split ring commutators. Its free space focal length is 15 mm. We also simulated a system where a pair of such lenses is placed on either side of biological tissue consisting of a 2-layer skin-bl…