基于聚合物光波导的电泵浦受激发射

项目名称： 基于聚合物光波导的电泵浦受激发射

项目编号： No.61275175

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 侯延冰

作者单位： 北京交通大学

项目金额： 82万元

中文摘要： 聚合物半导体是一种很好电致发光材料，且具有很好的激光增益特性。聚合物光波导增益区长，容易产生放大的放大的自发辐射（ASE），只要引入谐振光栅即可实现真正意义的激光。经过几年的研究，人们将这种结构器件的ASE阈值大幅度降低，这为实现电驱动下的ASE提供重要前提条件。本项目通过聚合物在高光强和高电流密度下光物理性质研究，澄清相关光物理过程，大幅降低光泵浦阈值光强。在此基础上通过聚合物分子排列控制，电极材料筛选，电极修饰等方法进一步降低有电极包裹的聚合物光波导的ASE的阈值光强；利用脉冲驱动减少器件热效应，提高器件电流和发光效率；通过染料掺杂和聚合物共混增加发射和吸收的能量间隔，减少基态和激发态吸收，提高ASE效率；通过电极外辅助层设计将电学设计和光学设计分别优化，在聚合物光波导上实现电驱动下ASE。本项目对澄清聚合物半导体高注入和高光强下的光物理过程，实现电泵浦聚合物激光具有重要促进意义。

中文关键词： 聚合物；波导；放大自发辐射；电激发；钙钛矿

英文摘要： Attributing to their low threshold of stimulated emission and high gain, semiconductive polymers are the potential materials promising as high gain media for solid-state laser devices. Meanwhile polymer can be fabricated to waveguide easily, which provide the possibility to realize facile waveguide. However, elctrically pumped organic laser is a very challenging problem for several reasons. First, it is difficult to pass very high current densities through most organic semiconductor. Second, there will be substantial optical losses associated with the contacts. Third,there is substantial absorption owing to the high density of injected charge carriers. Fourth,when opposite charges recombine in an organic semiconductor they frequently form a triplet exciton, which is not emissive in fluorescent materials and may also contribute to loss through its absorption. Finally, the singlet-triplet annihilation is a major barrier to electrically pumped lasing. The aim of this proposal is to use semiconductive polymers as active layer to develop a kind of electrically pumped laser device with the distributed Bragg reflectors at the ends of waveguide. In this kind of device, two grating is used as resonator to reduce the threshould of pumping laser or injecting current. In this proposal, the work is mainly focused on

英文关键词： polymer；waveguide；amplified spontaneous emission；Electric pumping；perovskite