有机半导体分布反馈激光器阵列的制备研究

项目名称： 有机半导体分布反馈激光器阵列的制备研究

项目编号： No.61505131

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 黄文彬

作者单位： 苏州大学

项目金额： 22万元

中文摘要： 宽调调谐、易于集成、操作简便的全有机激光器件对于柔性光电子电路的实现有着极其重要的意义。现有的可调谐有机分布反馈激光器存在调谐范围小、性能不稳定、需要多个泵浦激光器的问题。在本项目中，我们准备通过在柔性衬底制作有机分布反馈激光器阵列来解决上述问题。将采用廉价的发光二极管作为泵浦源，降低整个系统的成本和复杂性，同时利用Foster能量转移机制，一个泵浦源就可以激发出红绿蓝不同谱段的激光。拟采用拥有自主产权的像素型干涉光刻系统制作亚波长光栅阵列，然后通过紫外纳米压印转移到柔性衬底。将研究：（1）光栅深度、占空比、增益介质厚度、像素尺寸对激光器阈值及斜率效率的影响；（2）混合增益介质中材料种类、配比以及处理方式对于增益谱范围和增益系数的影响。聚合物芯片仅包含了亚波长光栅阵列及有机半导体发光层，与泵浦源及光学元件独立开来，可以通过简单替换来解决工作寿命的问题。

中文关键词： 可调谐激光；有机半导体；变频光栅；分布反馈激光器阵列

英文摘要： All-plastic lasers with a wide tuning range and ease for integration are appealing to the realization of flexible photonic integration circuits. Although the field of mircolasers based on organic semiconductor thrives in the last ten yeas, there remains problems such as limited tunable wavelength range, low working stability and complex wavelength tuning techniques. In this project, we try to solve these problems by fabricating organic semiconductor distributed feedback laser arrays on flexible substrates. We also plan to employ cheap LEDs as the pumping source as the working threshold of organic semiconductor lasers can be ultra-low. By properly blending different gain media, output lasing wavelength could cover the whole visible range while only one pumping source is employed. The laser array will be realized by our pixelated interferometric lithography system, with research emphasis on: (1) the influence of grating depth, size and the thickness of each waveguiding layer on the working characteristics of the distributed feedback lasers; (2) the influence of composition and processing techniques on the optical gain properties of the blended organic semiconductor medium. The plastic microchip with the organic laser array could be placed separately from the pumping source and other optical components, thus the problem of limited working lifetime of organic lasers will be conveniently solved by the substitution of the cheap plastic chip.

英文关键词： tunable laser sources;organic semiconductor;variable grating spatial frequency;distributed feedback laser array