Spectrally narrowed emissions in 2,5-bis(4-biphenylyl) thiophene crystals pumped by fs laser pulse
Spectrally narrowed emissions in 2,5-bis(4-biphenylyl) thiophene crystals pumped by fs laser pulse
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DOI：
10.1016/j.jlumin.2004.09.101
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发表时间：
2005-04
影响因子：
3.6
通讯作者：
S. Kobayashi;F. Sasaki;H. Yanagi;S. Hotta;M. Ichikawa;Y. Taniguchi
中科院分区：
文献类型：
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作者：
S. Kobayashi;F. Sasaki;H. Yanagi;S. Hotta;M. Ichikawa;Y. Taniguchi
研究了飞秒激光脉冲作用下2，5-二（4-联苯基）噻吩（BP 1 T）晶体的光谱窄化发射（SNE）。两种不同类型的变窄观察到在不同的振动电子发射带随着泵浦强度的增加。基于它们的泵浦强度依赖性和照明面积依赖性，我们将20，200 cm −1（β带）的SNE指定为放大自发辐射（ASE），而21，600 cm −1（α带）的SNE指定为超荧光而不是ASE。
Spectrally narrowed emission (SNE) in 2,5-bis(4-biphenylyl)thiophene (BP1T) crystals is investigated using fs laser pulse. Two different types of narrowing are observed at different vibronic emission bands with increasing pump intensities. Based on their pump intensity dependence and illumination area dependence, we assign the SNE at 20,200cm−1(β-band) to amplified spontaneous emission (ASE) and the SNE at 21,600cm−1(α-band) to superfluorescence rather than ASE.