Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2009-08-17

Journal: CHEMICAL PHYSICS LETTERS

Included Journals: EI、SCIE

Volume: 478

Issue: 1-3

Page Number: 37-41

ISSN: 0009-2614

Abstract: 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.