基于波导金和氧化锌的随机激光器的研究.PDFVIP

第36卷摇 第5期 发摇 光摇 学摇 报 Vol郾36 No郾5 2015年5月 CHINESEJOURNAL OF LUMINESCENCE May,2015 文章编号:1000鄄7032(2015)05鄄0557鄄06 基于波导、金和氧化锌的随机激光器的研究 * 李志全 ,赵晶晶,孟晓云,朴瑞琦,顾而丹,童摇 凯 (燕山大学 电气工程学院,河北 秦皇岛摇 066004) 摘要:通过将金属金嵌入到上下两层波导结构中,与ZnO随机粒子相结合,设计出一种新型结构的随机激光 器。 采用时域有限差分法(FDTD),数值模拟了该随机激光器系统的光场分布和模式频谱图,并针对金粒子 和金薄膜两种情况进行对比分析。 结果显示,采用金粒子作夹层时,出射激光模式数量减少,单色性较好;采 用金薄膜作夹层时,出射激光光强较大。 关摇 键摇 词:ZnO随机粒子;随机激光器;时域有限差分法;模式频谱 中图分类号:TN248摇 摇 摇 文献标识码:A摇 摇 摇 DOI:10.3788/ fgx0557 Research of Random Laser Based on Waveguide,Au and ZnO * LI Zhi鄄quan ,ZHAOJing鄄jing,MENG Xiao鄄yun,PIAO Rui鄄qi,GU Er鄄dan,TONG Kai (Institute of Electric Engineering,Yanshan University,Qinhuangdao066004,China) *Corresponding Author,E鄄mail:lzq54@ Abstract:A new typeof randomlaser structurecomposedof ZnOparticlesandAuwhich embedded in waveguide is proposed. The distribution of the optical filed and the modes spectra in the random laser system are numerically simulated by using the finite difference time domain (FDTD) method. We also compare and analyze the optical field and the modes spectra of random laser by using Au particles and Au film,respectively. The results show that when Au particles were embedded in waveguide,the number of modes reduced and the monochromaticity was better than Au film which only had a better laser output intensity. Key words:ZnOrandom particles;random lasers;finite difference time domain;pattern spectrum [3] 尖峰的原因 。 2011年,Redding 等通过实验研 1摇 引摇 摇 言 究了包含纳米粒子的染料溶液中随机激光发射的 自1968 年Letokhov 首次计算出随机增益