Motion-induced radiation from electrons moving in Maxwell's fish-eye

• Main Authors: Ang, L. K., Liu, Yangjie
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: Electrical and Electronic Engineering
• Online Access: https://hdl.handle.net/10356/79247; http://hdl.handle.net/10220/18446
• Institution: Nanyang Technological University

In Čerenkov radiation and transition radiation, evanescent wave from motion of charged particles transfers into radiation coherently. However, such dissipative motion-induced radiations require particles to move faster than light in medium or to encounter velocity transition to pump energy. Inspired by a method to detect cloak by observing radiation of a fast-moving electron bunch going through it by Zhang et al., we study the generation of electron-induced radiation from electrons' interaction with Maxwell's fish-eye sphere. Our calculation shows that the radiation is due to a combination of Čerenkov radiation and transition radiation, which may pave the way to investigate new schemes of transferring evanescent wave to radiation.