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Low threshold photonic crystal laser based on a Rhodamine dye doped high gain polymer
Shi, Lan-Ting1,2; Jin, Feng1,2,3; Zheng, Mei-Ling1,2; Dong, Xian-Zi1,2; Chen, Wei-Qiang1,2; Zhao, Zhen-Sheng1,2; Duan, Xuan-Ming1,2,3
2016-02-21
摘要We demonstrate low threshold lasing oscillation in a photonic crystal (PhC) laser by using tert-butyl Rhodamine B (t-Bu-RhB) doped gain media. Lactonic t-Bu-RhB is synthesized to improve doping concentration in polymethylmethacrylate (PMMA) films, and then isomerized to the zwitterion form to achieve highly fluorescent gain medium. The t-Bu-RhB doped PMMA film is sandwiched by a pair of polystyrene colloidal crystals to construct a PhC resonating cavity. Single-mode laser oscillation at 592 nm is observed when the PhC resonating cavity is pumped by a Nd:YAG laser. The lasing threshold is 0.12 MW cm(-2) utilizing 6.9 wt% t-Bu-RhB doped PMMA films, which is only 1/60 of that with 3 wt% t-Bu-RhB doped PMMA films. The concentration-dependent lasing action is attributed to different gain factors of the t-Bu-RhB doped PMMA films. Furthermore, a spatially and spectrally coherent laser beam from the PhC resonating cavity is verified by exploring the far-field image and angular dependence of the lasing emission. The approach provides a facile and efficient strategy to reduce the lasing threshold for fabricating low threshold PhC lasers.
DOI10.1039/c5cp06990d
发表期刊PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN1463-9076
卷号18期号:7页码:5306-5315
通讯作者Jin, F ; Duan, XM (reprint author), Chinese Acad Sci, Tech Inst Phys & Chem, Lab Organ NanoPhoton, 29 Zhongguancun East Rd, Beijing 100190, Peoples R China. ; Jin, F ; Duan, XM (reprint author), Chinese Acad Sci, Tech Inst Phys & Chem, Lab Bioinspired Smart Interface Sci, 29 Zhongguancun East Rd, Beijing 100190, Peoples R China. ; Duan, XM (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, 266 Fangzheng Ave, Chongqing 400714, Peoples R China.
收录类别SCI
WOS记录号WOS:000370421500028
语种英语