Photonics Research, 2018, 6 (5): 05000390, Published Online: Jul. 10, 2018
Band-gap-tailored random laser
Abstract
A band-gap-tailored random laser with a wide tunable range and low threshold through infrared radiation is demonstrated. When fluorescent dyes are doped into the liquid crystal and heavily doped chiral agent system, we demonstrate a wavelength tuning random laser instead of a side-band laser, which is caused by the combined effect of multi-scattering of liquid crystal (LC) and band-gap control. Through rotating the infrared absorbing material on the side of the LC cell, an adjustable range for random lasing of 80 nm by infrared light irradiation was observed.
Hongbo Lu, Jian Xing, Cheng Wei, Jiangying Xia, Junqing Sha, Yunsheng Ding, Guobing Zhang, Kang Xie, Longzhen Qiu, Zhijia Hu. Band-gap-tailored random laser[J]. Photonics Research, 2018, 6(5): 05000390.