Broadly tunable deep blue laser based on a star-shaped oligofluorene truxene
Broadly tunable deep blue laser based on a star-shaped oligofluorene truxene
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DOI：
10.1016/j.synthmet.2010.04.016
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发表时间：
2010-07-01
期刊：
影响因子：
4.4
通讯作者：
Samuel, Ifor D. W.
中科院分区：
文献类型：
--
作者：
Wang, Yue;Tsiminis, Georgios;Samuel, Ifor D. W.
We report amplified spontaneous emission (ASE) and optically pumped deep-blue-emitting distributed feedback (DFB) lasers based on a star-shaped oligofluorene truxene molecule. A low ASE threshold of 2.1 kW/cm(2) at 439 nm was achieved. The material exhibits a high net gain of 38 cm(-1) and also low optical loss coefficient of 3.5 cm(-1). Second-order DFB lasers show tuning of the emission wavelength from 422 to 473 nm, and a minimum threshold density of 515 W/cm(2). This is the broadest tuning range (51 nm) reported for organic deep-blue/blue lasing materials. (C) 2010 Elsevier B.V. All rights reserved.
