In this work,we present a new mechanism for designing phase-gradient metasurfaces (PGMs) to control an electromagnetic wavefront with high efficiency.Specifical
As recombination centers of vacancies (Vs) and self-interstitial atoms (SIAs),firstly grain boundaries (GBs) should have strong capability of trapping point def
We demonstrate a Fe∶ZnSe laser gain-switched by a 2.9μm ZnGeP2 optical parametric oscillator under pulse repetition frequency of 1 kHz at liquid nitrogen temp