Topological charge of finite-size photonic crystal modes
Optics
2020-07-22 v1
Abstract
Topological charges are the winding numbers of polarization vectors around the vortex centers of far-field radiation. In this work, the topological charge of photonic crystal modes is theoretically analyzed using an envelope function approach. A group of modes is discovered with unique polarization properties dictated by their non-trivial envelope functions. Experimentally, lasing operation on such mode is demonstrated in an electrically pumped mid-infrared photonic crystal surface-emitting laser with high slope efficiency. The topological charge is directly observed from the polarization properties of single-mode laser emission.
Keywords
Cite
@article{arxiv.2003.11402,
title = {Topological charge of finite-size photonic crystal modes},
author = {Zhixin Wang and Yong Liang and Mattias Beck and Giacomo Scalari and Jérôme Faist},
journal= {arXiv preprint arXiv:2003.11402},
year = {2020}
}