nl8b04402_si_001.pdf (1.64 MB)
Controlled Outcoupling of Whispering-Gallery-Mode Lasers Based on Self-Assembled Organic Single-Crystalline Microrings
journal contribution
posted on 2019-01-09, 00:00 authored by Yuanchao Lv, Xiao Xiong, Yingying Liu, Jiannian Yao, Yong Jun Li, Yong Sheng ZhaoThe outcoupling of whispering-gallery-mode (WGM) lasers is crucial
for the realization of various photonic functionalities, yet present
material structures still suffered the unexpected surface damages
or contaminations in the multistep micro/nanofabrications. Here, we
propose a strategy to achieve controlled outcoupling of WGM lasers
in self-assembled organic single-crystalline microrings. The microrings
with molecular-smooth surfaces functioned as organic crystalline whispering-gallery-mode
microlasers with a lasing threshold of ∼14.2 μJ cm–2 and a quality factor on the order of 103 to 104. The circular self-assembly allowed us to design
different derived ring-based structures toward desired outcoupling
of the WGM lasers, including unidirectional laser output from wire-ring
coupled structures, and single-mode lasing in double-ring coupled
systems. The results would provide an alternative avenue to construct
versatile organic nanoscale lasers and related components with specific
photonic applications.