Improving the conversion efficiency of an organic distributed feedback laser by varying solvents of the laser gain layer

被引：4

作者：

Liu, Minghuan ^{[1
,2
]}

Liu, Yonggang ^{[1
]}

Zhang, Guiyang ^{[1
,2
]}

Liu, Lijuan ^{[1
,2
]}

Diao, Zhihui ^{[1
]}

Yang, Chengliang ^{[1
]}

Peng, Zenghui ^{[1
]}

Yao, Lishuang ^{[1
]}

Ma, Ji ^{[1
,3
]}

Xuan, Li ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun, Peoples R China

[2] Univ Chinese Acad Sci, Beijing, Peoples R China

[3] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA

来源：

LIQUID CRYSTALS | 2016年 / 43卷 / 03期

基金：

中国国家自然科学基金;

关键词：

lasing threshold; slope conversion efficiency; Organic solid-state lasers; distributed feedback; DISPERSED LIQUID-CRYSTAL; LIGHT-EMITTING-DIODES; INTERCHAIN INTERACTIONS; CONJUGATED POLYMERS; DEVICE PERFORMANCE; AGGREGATION; MORPHOLOGY; LUMINESCENCE; ORIENTATION;

D O I：

10.1080/02678292.2015.1116628

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Control experiments were performed to improve the slope conversion efficiency of the organic distributed feedback laser by varying the dissolution solvents of the laser gain layer, a conjugated polymer poly(2-methoxy-5-(2MODIFIER LETTER PRIME-ethyl-hexyloxy)-1,4-phenylene-vinylene) (MEH-PPV) in this work. The distributed feedback configuration of the laser was prepared by holographic photopolymerisation of the polymer/liquid crystal (HPDLC) mixture. Experimental results showed that the tetrahydrofuran (THF) solvent cast laser gain layer had a lower lasing threshold (0.28 mu J/pulse) and a higher slope conversion efficiency (7.8%) than that of the xylene solvent cast laser gain layer (0.5 mu J/pulse, 4.9%). Thin film waveguide characterisation demonstrated that the THF-cast film possessed a smaller waveguide loss (5.3cm(-1)) and larger net gain (17.1cm(-1)) than the xylene-cast film (8.3cm(-1), 15.7cm(-1)). Absorbance and photoluminescence spectra indicated that the THF-cast film showed brighter luminescence at 620nm and larger absorbance at 532nm, indicating that the interchain interactions of the MEH-PPV is different, which plays the vital role in improving the optical performance of our organic DFB lasers.

引用

页码：417 / 426

页数：10

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