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1. 中国科学院长春物理研究所 长春,130021
2. 中国科学院激发态物理开放研究实验室 长春,130021
3. 中国科学院长春应用化学研究所,吉林 长春,130022
纸质出版日期:2000-2-29,
收稿日期:1999-6-23,
修回日期:1999-10-14,
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赵家民, 王淑梅, 王立军, 刘云, 刘星元, 宁永强, 吴东江, 武胜利, 付德惠, 金长清, 王利祥, 景遐斌, 王佛松. Alq/DCM薄膜中的放大自发发射[J]. 发光学报, 2000,21(1): 71-73
ZHAO Jia-min, WANG Shu-mei, WANG Li-jun, LIU Yun, LIU Xing-yuan, NING Yong-qiang, WU Dong-jiang, WU Sheng-li, FU De-hui, JIN Chang-qing, WANG Li-xiang, JING Xia-bin, WANG Fo-song. Amplified Spontaneous Emission in the Film of Alq Doped with Dye DCM[J]. Chinese Journal of Luminescence, 2000,21(1): 71-73
赵家民, 王淑梅, 王立军, 刘云, 刘星元, 宁永强, 吴东江, 武胜利, 付德惠, 金长清, 王利祥, 景遐斌, 王佛松. Alq/DCM薄膜中的放大自发发射[J]. 发光学报, 2000,21(1): 71-73 DOI:
ZHAO Jia-min, WANG Shu-mei, WANG Li-jun, LIU Yun, LIU Xing-yuan, NING Yong-qiang, WU Dong-jiang, WU Sheng-li, FU De-hui, JIN Chang-qing, WANG Li-xiang, JING Xia-bin, WANG Fo-song. Amplified Spontaneous Emission in the Film of Alq Doped with Dye DCM[J]. Chinese Journal of Luminescence, 2000,21(1): 71-73 DOI:
自从在以8-羟基喹啉铝(Alq)掺杂小分子激光染料DCM为激活介质的波导结构中
光泵浦下观察到激光现象以来
这种以高效发光有机半导体材料代替以往的溶胶、凝胶或透明聚合物材料来稀释激光染料的方法
引起了人们广泛的关注和巨大的兴趣。因为Alq的发射谱和DCM的激发谱有很大的重叠
所以经光泵浦后的Alq:DCM薄膜中处于激发态的Alq分子很容易与附近的DCM分子形成能量迁移.从而其发射谱表现为DCM的荧光谱
而不是Alq和DCM的荧光谱的简叠加。
Optically pumped stimulated emission behavior was demonstrated in a slab-waveguide structure formed by substrate/organic film/air. The organic film was deposited by high vacuum (1×10
-3
Pa) co-evaporating of 8-hydroxyquinolinato aluminum(Alq) and laser dye DCM. A wafer of quartz was used as the substrate. The thickness of the organic film was about 300nm
and the percentage of DCM was about 3%. The third harmonic output(355nm) of a Nd:YAG laser was used as the excitation source. The pulse width was about 300ps. The repetition rate was 2Hz. The pump beam was focused onto the sample with a cylindrical lens (
f
=10cm). The excitation area was a typical 10mm×0.2mm stripe. Detected from the side or the surface of the organic film
the fluorescence spectrum with the FWHM (the full width at half maximum) of about 110nm was achieved at excitation pulses energy of 0.1μJ. Increasing the excitation pulse energy to 4μJ
the FWHM of the spectrum detected from the edge of the sample reduced to 13nm with the peak at 620nm and the spectrum from the surface was still a broad band. The change of the emission spectra detected from the edge of the sample showed a clear threshold action and gain narrowing phenomenon when increasing the excitation intensity. The spectrally gain narrowing results from the amplified spontaneous emission (ASE) of the waveguide along the excitation stripe in the film.
平板波导受激辐射放大自发发射增益窄化
planar waveguidestimulated emissionamplified spontaneous emissiongain narrowing
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