,Low-Threshold Conjugated Polymer Distributed Feedback Lasers on InP Substrate

• 作 者: ZHANG Su-Mei ZHANG Ding-Ke MA Dong-Ge
• 机 构: State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chine
• 出 处: 中国物理快报（英文版）
• 发表日期: 2008年5期

We demonstrate a low threshold polymer sofid state thin-film distributed feedback (DFB) laser on an InP substrate with the DFB structure.The used gain medium is conjugated polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene](MEH-PPV) doped polystyrene (PS) and formed by drop-coating method.The second order Bragg scattering region on the InP substrate gave rise to strong feedback,thus a lazing emission at 638.9nm with a line width of 1.2nm is realized when pumped by a 532nm frequency-doubled Nd:YAG pulsed laser.The devices show a laser threshold as low as 7n J/pulse.