77 citations · 246 across the 10 of their papers we have counts for
10 papers
Asymmetric nonlinear-mode-conversion in an optical waveguide with PT symmetry
Changdong Chen, Youwen Liu, Lina Zhao +2
Asymmetric mode transformation in waveguide is of great significance for on-chip integrated devices with one-way effect, while it is challenging to achieve asymmetric nonlinear-mod…
Phase-gradient metasurfaces based on local Fabry-Perot resonances
Yanyan cao, Bocheng Yu, Yangyang Fu +2
In this work we present a new mechanism for designing phase-gradient metasurfaces (PGMs) to control an electromagnetic wavefront with high efficiency. Specifically, we design a tra…
Switchable bifunctional metasurfaces: nearly perfect retroreflection and absorption at THz regime
Shan Zhu, Yanyan Cao, Yangyang Fu +4
Here we make use of vanadium dioxide (VO2) to design a bifunctional metasurface working at the same targeted frequency. With the increase of temperature, the functionality of the d…
Controllably asymmetric beam splitting via gap-induced diffraction channel transition in dual-layer binary metagratings
Yangyang Fu, Jiaqi Tao, Ailing Song +2
In this work, we designed and studied a feasible dual-layer binary metagrating, which can realize controllable asymmetric transmission and beam splitting with nearly perfect perfor…
Enhanced third-harmonic generation induced by nonlinear field resonances in plasmonic-graphene metasurfaces
Yulian Liu, Shan Zhu, Qingjia Zhou +5
Nonlinear metasurfaces offer new paradigm for boosting optical effect beyond limitations of conventional materials. In this work, we present an alternative way to produce pronounce…
Compact Acoustic Retroreflector Based on A Mirrored Luneburg Lens
Yangyang Fu, Junfei Li, Yangbo Xie +4
We propose and demonstrate a compact acoustic retroreflector that reroutes probing signals back towards the source with minimal scattering. Gradient refractive index (GRIN) acousti…
Coherent perfect absorption and laser modes in a cylindrical structure of conjugate metamaterials
Yangyang Fu, Yadong Xu, Huanyang Chen +1
In this work, we theoretically find that coherent perfect absorption (CPA) and laser modes can be realized in a two-dimensional cylindrical structure composed of conjugate metamate…
Negative refraction based on purely imaginary conjugate metamaterials
Yangyang Fu, Yadong Xu, Huanyang Chen
By introducing a new mechanism based on purely imaginary conjugate metamaterials (PICMs), we reveal that bidirectional negative refraction and planar focusing can be obtained using…
Coherent perfect absorber and laser in purely imaginary conjugate metamaterials
Yangyang Fu, Yanyan Cao, Steven A. Cummer +2
Conjugate metamaterials, in which the permittivity and the permeability are complex conjugates of each other, possess the elements of loss and gain simultaneously. By employing a c…
Conjugate metamaterials and the perfect lens
Yadong Xu, Yangyang Fu, Lin Xu +1
In this letter, we show how transformation optics makes it possible to design what we call conjugate metamaterials. We show that these materials can also serve as substrates for ma…