170 citations · 518 across the 18 of their papers we have counts for
18 papers
Reconfigurable Superdirective and Superabsorptive Aperiodic Metasurfaces
Yongming Li, Xikui Ma, Xuchen Wang +1
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 sm…
Going Beyond Perfect Absorption: Reconfigurable Super-directive Absorbers
Yongming Li, Xikui Ma, Xuchen Wang +1
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., pe…
Tunable Perfect Anomalous Reflection Using Passive Aperiodic Gratings
Yongming Li, Xikui Ma, Xuchen Wang +3
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 aperio…
Discrete Impedance Metasurfaces for 6G Wireless Communications in D-Band
Sergei Kosulnikov, Xuchen Wang, Sergei A. Tretyakov
Engineering and optimization of wireless propagation channels will be one of the key elements of future communication technologies. Metasurfaces may offer a wide spectrum of functi…
Coherent control of wave beams via unidirectional evanescent modes excitation
Shuomin Zhong, Xuchen Wang, Sergei A. Tretyakov
Conventional coherent absorption occurs only when two incident beams exhibit mirror symmetry with respect to the absorbing surface, i.e., the two beams have the same incident angle…
Controlling surface waves with temporal discontinuities of metasurfaces
Xuchen Wang, Mohammad Sajjad Mirmoosa, Sergei A. Tretyakov
In this paper, we investigate the scattering of surface waves on reactive impedance boundaries when the surface impedance undergoes a sudden change in time. We report three exotic…
Metasurface-Based Realization of Photonic Time Crystals
Xuchen Wang, Mohammad Sajjad Mirmoosa, Viktar S. Asadchy +3
Photonic time crystals are artificial materials whose electromagnetic properties are uniform in space but periodically vary in time. The synthesis of such materials and experimenta…
Fast and Robust Characterization of Dielectric Slabs Using Rectangular Waveguides
Xuchen Wang, Sergei A. Tretyakov
Waveguide characterization of dielectric materials is a convenient and broadband approach for measuring dielectric constant. In conventional microwave measurements, material sample…
Dispersion of Surface Waves above Time-Varying Reactive Boundaries
Xuchen Wang, Mohammad S. Mirmoosa, Sergei A. Tretyakov
In this presentation, we analytically derive the dispersion equation for surface waves traveling along reactive boundaries which are periodically modulated in time. In addition, we…
Space-Time Metasurfaces for Perfect Power Combining of Waves
Xuchen Wang, Viktar S. Asadchy, Shanhui Fan +1
In passive linear systems, complete combining of powers carried by waves from several input channels into a single output channel is forbidden by the energy conservation law. Here,…
Time-varying components for enhancing wireless transfer of power and information
Prasad Jayathurathnage, Fu Liu, Mohammad S. Mirmoosa +3
Temporal modulation of components of electromagnetic systems provides an exceptional opportunity to engineer the response of those systems in a desired fashion, both in the time an…
Independent Control of Multiple Channels in Metasurface Devices
Xuchen Wang, Ana Díaz-Rubio, Sergei A. Tretyakov
In analogy with electromagnetic networks which connect multiple input-output ports, metasurfaces can be considered as multi-port devices capable of providing different functionalit…
Nonreciprocity in Bianisotropic Systems with Uniform Time Modulation
Xuchen Wang, Grigorii Ptitcyn, Ana Díaz-Rubio +4
Physical systems with material properties modulated in time provide versatile routes for designing magnetless nonreciprocal devices. Traditionally, nonreciprocity in such systems i…
Theory and Design of Multifunctional Space-Time Metasurfaces
Xuchen Wang, Ana Diaz-Rubio, Huanan Li +2
Integrating multiple functionalities into a single metasurface is becoming of great interest for future intelligent communication systems. While such devices have been extensively…
Graphene-based Perfect Absorbers: Systematic Design and High Tunability
Xuchen Wang, Sergei A. Tretyakov
Experimental realization of efficient graphene-based absorbers is a challenging task due to the low carrier mobility in processed graphene. In this paper, we circumvent this proble…
Graphene-Based Tunable Metasurface for All-angle Perfect Absorption
Xu-Chen Wang, Sergei A. Tretyakov
Motivated by the idea of smart metasurfaces, we will demonstrate a graphene-based tunable absorber in which perfect absorption can be achieved for all angles of incidence, only by…
Extreme Asymmetry in Metasurfaces via Evanescent Fields Engineering: Angular-Asymmetric Absorption
Xuchen Wang, Ana Diaz-Rubio, Viktar S. Asadchy +4
On the quest towards full control over wave propagation, the development of compact devices that allow asymmetric response is a challenge. In this Letter, we introduce a new paradi…
Toward Ultimate Control of Terahertz Wave Absorption in Graphene
Xuchen Wang, Sergei A. Tretyakov
It is commonly believed that weak light-matter interactions in low-mobility graphene dramatically limits tunability of graphene-based optoelectronic devices, such as tunable absorb…