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论文类型：期刊论文

发表时间：2009-08-17

发表刊物：CHEMICAL PHYSICS LETTERS

收录刊物：SCIE、EI

卷号：478

期号：1-3

页面范围：37-41

ISSN号：0009-2614

摘要：We report the emissive properties of a fluorene-based polymer, PF-1SOR, in planar asymmetric waveguides under optical pumping. A laser beam homogenizer setup was applied to achieve the flat-top intensity profile of the excitation light. Amplification of deep blue light via stimulated emission (SE) occurred at an energy threshold of 11 mu J cm(-2) and the amplified spontaneous emission (ASE) peak could be tuned from 411 to 423 nm. A net gain coefficient of 19.8 cm(-1) was obtained by means of the modified variable stripe length (VSL) method. The PF-1SOR thin films delivered a remarkably low loss coefficient of 1.5 cm(-1), among the lowest ever reported for a single component polymer waveguide. (C) 2009 Elsevier B. V. All rights reserved.