Zhang Dingke, Deng Zhaoqi, Wang Qiang, Li Bixin, Chen Shijian, Wang Yanping, Liu Yichun, Ma Dongge
Centre for Advanced Optoelectronic Functional Material Research, Northeast Normal University, Changchun 130024, China.
Appl Opt. 2010 Jan 20;49(3):315-9. doi: 10.1364/AO.49.000315.
We demonstrate that the amplified spontaneous emission (ASE) in an Ag-backed red-fluorescent-dye-doped polymer film can be controlled by the effect of the film thickness. Optical losses associated with the metallic contacts necessary for charge injection, an obstacle to the development of an electrically pumped organic solid-state laser, may be possible to be reduced by increasing the gain medium layer thickness. The study of ASE characteristics of Ag-backed 4-(Dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB)-doped polystyrene (PS) films with different thicknesses shows that increasing the film thickness can reduce the influence of the Ag layer. The threshold, gain, and loss of the device with a thickness of 800 nm are comparable to those of a metal-free device. Our findings demonstrate that the Ag-backed DCJTB:PS film can still be a good organic gain medium material for the fabrication of solid-state lasers, when the thickness of the DCJTB:PS layer increases to an appropriate value.
我们证明，银背衬的掺杂红色荧光染料的聚合物薄膜中的放大自发辐射（ASE）可以通过薄膜厚度的影响来控制。与电荷注入所需的金属接触相关的光学损耗是电泵浦有机固态激光器发展的一个障碍，通过增加增益介质层的厚度可能会降低这种损耗。对不同厚度的银背衬的4-（二氰基亚甲基）-2-叔丁基-6-（1,1,7,7-四甲基久洛尼定-9-烯基）-4H-吡喃（DCJTB）掺杂聚苯乙烯（PS）薄膜的ASE特性研究表明，增加薄膜厚度可以降低银层的影响。厚度为800 nm的器件的阈值、增益和损耗与无金属器件相当。我们的研究结果表明，当DCJTB:PS层的厚度增加到适当值时，银背衬的DCJTB:PS薄膜仍然可以是用于制造固态激光器的良好有机增益介质材料。
