Journal
NANOPHOTONICS
Volume 9, Issue 6, Pages 1491-1499Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2020-0090
Keywords
Cherenkov radiation; hexagonal boron nitride (hBN); hyperbolic materials; phonon polaritons
Categories
Funding
- National Key R&D Program of China [2018YFB2200402]
- National Natural Science Foundation of China [61575104, 61621064]
- Natural Science Foundation of Beijing Municipality [Z180012]
- Beijing Innovation Center for Future Chip
- Beijing Academy of Quantum Information Science
Ask authors/readers for more resources
Cherenkov radiation (CR) is the electromagnetic shockwaves generated by the uniform motion of charged particles at a velocity exceeding the phase velocity of light in a given medium. In the Reststrahlen bands of hexagonal boron nitride (hBN), hyperbolic phonon polaritons (HPPs) are generated owing to the coupling between mid-infrared electromagnetic waves and strong anisotropic lattice vibrations. This study theoretically and numerically investigates the generation of volume CR based on HPPs in hBN with super-large wavevectors. Results reveal that CR can be generated using free electrons with an extremely low kinetic energy of 1 eV-two orders of magnitude lower than that reported in extant studies. The findings of this investigation provide new insights into significantly reducing the electron energy required for CR generation and potentially open new research avenues in the fields of CR and HPP.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available