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physics.optics2023
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…
physics.optics2023
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…