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首页> 外文期刊>Optics Letters >Two-photon excited highly polarized and directional upconversion emission from slab organic crystals
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Two-photon excited highly polarized and directional upconversion emission from slab organic crystals

机译：平板有机晶体的双光子激发的高偏振和定向上转换发射

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摘要

Effective upconversion emission from an organic crystal of cyano-substituted oligo (p-phenylenevinylene) (CNDPASDB) based on two-photon absorption is presented. Frequency upconverted cavityless lasing, or amplified spontaneous emission, from the crystal pumped by a femtosecond laser of 800 nm was observed when the excitation energy exceeded the threshold of 1.3 mJ pulse~(-1) cm~(-2). Its polarization contrast was estimated to be approx0.93. This large ratio is due to the unified unidirectional configuration of the molecular long axis in crystal, beneficial to the stimulated emission with a low threshold. These results indicate that the present CNDPASDB crystal has a potential for upconversion laser device application.
机译：提出了基于双光子吸收的氰基取代的低聚对苯撑亚乙烯基（CNDPASDB）有机晶体的有效上转换发射。当激发能量超过1.3 mJ pulse〜（-1）cm〜（-2）的阈值时，从800 nm飞秒激光泵浦的晶体中观察到频率上变频的无腔激射或放大的自发发射。其偏振对比度估计约为0.93。较大的比例归因于晶体中分子长轴的统一单向配置，有利于低阈值的受激发射。这些结果表明，当前的CNDPASDB晶体具有上转换激光器件应用的潜力。

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