Zobrazeno 1 - 10
of 452
pro vyhledávání: '"Ma, Xikui"'
In this paper, we present a general theory of aperiodic subwavelength arrays for controlling electromagnetic waves. The considered platform is formed by an array of electrically small loaded scatterers above a ground plane. While the array is geometr
Externí odkaz:
http://arxiv.org/abs/2404.07608
Space-time modulation systems have garnered significant attention due to their resemblance to moving-matter systems and promising applications. Unlike conventional moving-matter systems, modulation systems do not involve net motion of matter, and are
Externí odkaz:
http://arxiv.org/abs/2404.00079
In the context of electromagnetic absorption, it is obvious that for an infinite planar periodic structure illuminated by a plane wave, the maximum attainable absorptance, i.e., perfect absorption, is theoretically limited to 100% of the incident pow
Externí odkaz:
http://arxiv.org/abs/2402.11971
The Cerenkov radiation and the Smith-Purcell effect state that free electron emission occurs exclusively in dielectrics when the velocity of the particles exceeds the speed of light in the medium or in the vicinity of periodic gratings close to each
Externí odkaz:
http://arxiv.org/abs/2311.01203
Space-time modulation-based metamaterials have recently spurred considerable interest, owing to the fundamental addition of the time dimension to the medium parameters, and resulting novel properties and potential applications. However, the implement
Externí odkaz:
http://arxiv.org/abs/2307.05613
Exceptional points (EP) in non-Hermitian systems have been widely investigated due to their enhanced sensitivity in comparison to standard systems. In this letter, we report the observation of higher-order pseudo-Hermitian degeneracies in an electron
Externí odkaz:
http://arxiv.org/abs/2305.00900
Autor:
Li, Yongming, Ma, Xikui, Wang, Xuchen, Ptitcyn, Grigorii, Movahediqomi, Mostafa, Tretyakov, Sergei A.
Realizing continuous sweeping of perfect anomalous reflection in a wide angular range has become a technical challenge. This challenge cannot be overcome by the conventional aperiodic reflectarrays and periodic metasurfaces or metagratings. In this p
Externí odkaz:
http://arxiv.org/abs/2303.05411
The application of transformation optics to the development of intriguing electromagnetic devices can produce weakly anisotropic or isotropic media with the assistance of quasi-conformal and/or conformal mapping, as opposed to the strongly anisotropi
Externí odkaz:
http://arxiv.org/abs/2301.00352
With the flourishing development of nanophotonics, Cherenkov radiation pattern can be designed to achieve superior performance in particle detection by fine-tuning the properties of metamaterials such as photonic crystals (PCs) surrounding the swift
Externí odkaz:
http://arxiv.org/abs/2211.15117
High-performance interrogation of inductor-capacitor (LC) microsensor has been a long-standing challenge due to the limited size of the sensor. Parity-time (PT) symmetry, an intriguing concept originated from quantum physics, has been utilized to imp
Externí odkaz:
http://arxiv.org/abs/2209.02323