Microscale vortex laser with controlled topological charge

doi:10.1088/1674-1056/25/12/124211

Abstract

A microscale vortex laser is a new type of coherent light source with small footprint that can directly generate vector vortex beams. However, a microscale laser with controlled topological charge, which is crucial for virtually any of its application, is still unrevealed. Here we present a microscale vortex laser with controlled topological charge. The vortex laser eigenmode was synthesized in a metamaterial engineered non-Hermitian micro-ring cavity system at exceptional point. We also show that the vortex laser cavity can operate at exceptional point stably to lase under optical pumping. The microscale vortex laser with controlled topological charge can serve as a unique and general building block for next-generation photonic integrated circuits and coherent vortex beam sources. The method we used here can be employed to generate lasing eigenmode with other complex functionalities.

Keywords: exceptional point non-Hermitian system orbital angular momentum vortex laser

Received: 20 October 2016
Revised: 07 November 2016
Accepted manuscript online:

PACS:	42.55.Px	(Semiconductor lasers; laser diodes)
	42.55.Sa	(Microcavity and microdisk lasers)
	42.60.By	(Design of specific laser systems)

Fund:

Project supported by the "Youth 1000 Talent Plan" Fund, Ministry of Education of China (Grant No. 201421) and the National Natural Science Foundation of China (Grant Nos. 11574012 and 61521004).

Corresponding Authors: Ren-Min Ma
E-mail: renminma@pku.edu.cn

Cite this article:

Xing-Yuan Wang(王兴远), Hua-Zhou Chen(陈华洲), Ying Li(黎颖), Bo Li(李波), Ren-Min Ma(马仁敏) Microscale vortex laser with controlled topological charge 2016 Chin. Phys. B 25 124211

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Microscale vortex laser with controlled topological charge

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