Low threshold random lasing in dye-doped and strongly disordered chiral liquid crystals

被引：19

作者：

Ga, Shaohua ^{[1
,2
]}

Wang, Jiayi ^{[1
]}

Li, Wenhua ^{[1
]}

Yu, Xuanyi ^{[1
]}

Zhang, Xinzheng ^{[1
,3
]}

Song, Xiao ^{[1
]}

Iljin, Andrey ^{[4
]}

Drevensek-Olenik, Irena ^{[5
,6
]}

Rupp, Romano A. ^{[1
,7
]}

Xu, Jingjun ^{[1
,3
]}

机构：

[1] Nankai Univ, TEDA Inst Appl Phys & Sch Phys, MOE Key Lab Weak Light Nonlinear Photon, Tianjin 300457, Peoples R China

[2] Taiyuan Univ Technol, Coll Phys & Optoelect, Inst Optoelect Engn, Taiyuan 030024, Peoples R China

[3] Synerget Innovat Ctr Chem Sci & Engn, Tianjin 300071, Peoples R China

[4] Natl Acad Sci Ukraine, Inst Phys, Prospect Nauki 46, UA-03028 Kiev, Ukraine

[5] Univ Ljubljana, Fac Math & Phys, Ljubljana, Slovenia

[6] J Stefan Inst, Dept Complex Matter, Ljubljana, Slovenia

[7] Univ Vienna, Fac Phys, Boltzmanngasse 5, A-1090 Vienna, Austria

来源：

PHOTONICS RESEARCH | 2020年 / 8卷 / 05期

基金：

中国国家自然科学基金;

关键词：

RANDOM LASER ACTION; LIGHT; GAIN;

D O I：

10.1364/PRJ.388706

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Random lasing was experimentally investigated in pyrromethene 597-doped strongly disordered chiral liquid crystals (CLCs) composed of the nematic liquid crystal SLC1717 and the chiral agent CB15. The concentration of the chiral agent tuned the bandgap, and disordered CLC microdomains were achieved by fast quenching of the mixture from the isotropic to the cholesteric phase. Random lasing and band edge lasing were observed synchronously, and their behavior changed with the spectral location of the bandgap. The emission band for band edge lasing shifted with the change of the bandgap, while the emission band for random lasing remained practically constant. The results show that the threshold for random lasing sharply decreases if the CLC selective reflection band overlaps with the fluorescence peak of the dye molecules and if the band edge coincides at the same time with the excitation wavelength. (C) 2020 Chinese Laser Press

引用

页码：642 / 647

页数：6

共 37 条

[1] Low threshold DFB lasing in chiral LC at diffraction of pumping wave [J].