121 citations · 356 across the 17 of their papers we have counts for
17 papers
Gauge invariance in phase-gradient metagratings
Qingjia zhou, Lei Gao, Yadong Xu
Phase gradient metagratings/metasurfaces (PGMs) have provided a new paradigm for light manipulations. In this work, we will show the existence of gauge invariance in PGMs, i.e., th…
Nonlinear Nanophotonic Circuitry: Tristable and Astable Multivibrators and Chaos Generator
Pujuan Ma, Lei Gao, Pavel Ginzburg +1
The concept of lumped optical nanoelements (or metactronics), wherein nanometer-scale structures act as nanoinductors, nanocapacitors and nanoresistors, has attracted a great deal…
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…
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…
Ultrafast cryptography with indefinitely switchable optical nanoantennas
Pujuan Ma, Lei Gao, Pavel Ginzburg +1
Bistability is widely exploited to demonstrate all-optical signal processing and light-based computing. The standard paradigm of switching between two steady states corresponding t…