High‐Q Metallic Fano Metamaterial for Highly Efficient Cerenkov Lasing
Abstract
A high‐quality‐factor (high‐Q) metallic Fano metamaterial is demonstrated both experimentally and theoretically. This material is suitable for highly efficient Cerenkov lasing in which subwavelength metallic slits are arranged to form asymmetric unit cells. In contrast to conventional dielectric Cerenkov or Smith–Purcell devices, in the proposed device, convection electrons traverse the high‐Q metallic metamaterial. The interplay between an extremely low group velocity from the infinite transverse permittivity of the anisotropic metamaterial and the subradiant damping from a Fano‐type slit mode is shown to be responsible for the high‐Q value, which is measured to be unprecedented at 700. The resulting improvement in the Cerenkov lasing efficiency is estimated to be more than two orders of magnitude using a particle‐in‐cell simulation.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 03, 2018
- Source ID
- 10.1002/adom.201800041
Entities
People
- Anirban Bera
- Dai‐sik Kim
- Dongpyo Hong
- Gun-Sik Park
- In‐keun Baek
- Jin‐kyu So
- Matlabjon Sattorov
- Ranajoy Bhattacharya
- Seontae Kim
Organizations
- Air Force Office of Scientific Research
- Nanyang Technological University
- National Research Foundation of Korea
- Office of Naval Research
- Seoul National University