Investigation of amplified spontaneous emission in oriented films of a liquid crystalline conjugated polymer

被引：31

作者：

Heliotis, G

Xia, R

Whitehead, KS

Turnbull, GA

Samuel, IDW

Bradley, DDC ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Ultrafast Photon Collaborat, Expt Solid State Grp, London SW7 2BZ, England

[2] Univ London Imperial Coll Sci Technol & Med, Ctr Elect Mat & Device, Blackett Lab, London SW7 2BZ, England

[3] Univ St Andrews, Organ Semicond Ctr, St Andrews, Fife, Scotland

[4] Univ St Andrews, Ultrafast Photon Collaborat, Sch Phys & Astron, St Andrews, Fife, Scotland

来源：

SYNTHETIC METALS | 2003年 / 139卷 / 03期

关键词：

polyfluorenes; waveguides; amplification; lasers; oriented polymers;

D O I：

10.1016/S0379-6779(03)00236-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a study of the amplified spontaneous emission (ASE) in highly oriented films of dioctyl substituted polyfluorene (PFO). We demonstrate amplification of blue light via ASE measurements on optically pumped aligned PFO planar asymmetric waveguides and investigate the influence that the orientation of the polymer chains has on its properties as an amplifying medium. We show that the threshold energy for ASE and the intensity of the emitted amplified radiation is dependent on the excitation polarization, chain alignment axis and excitation geometry and propose specific optimised excitation configurations for low threshold, efficient ASE. Identical measurements are performed on isotropic PFO films for comparison. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：727 / 730

页数：4

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