4 papers · 1 filter
Focal control and light tracing on curved surfaces with isotropic transformation medium
Xiaoyu Zhao, Longfei Shi, Zhuoyu Zhang +4
Optics related to non-Euclidean geometry has been attracting growing interest for emerged novel phenomena and the analog for general relativity, while most studies are limited to t…
Topological invariant of non-Hermitian space-time modulated photonic crystals
Xiaoke Gao, Xiaoyu Zhao, Jiawei Wang +2
We propose a medium transformation approach to formulate the adjoint system of space-time modulated photonic crystals (STMPCs), essential for the bi-orthogonal Berry connection whe…
Free electron emission in vacuum assisted by photonic time crystals
Xiaoke Gao, Xiaoyu Zhao, Xikui Ma +1
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 ligh…
Controlling Electromagnetic Surface Waves with Conformal Transformation Optics
Xiaoyu Zhao, Hong Deng, Xiaoke Gao +2
The application of transformation optics to the development of intriguing electromagnetic devices can produce weakly anisotropic or isotropic media with the assistance of quasi-con…