边界元积分法分析椭圆模式和远场特性  

Mode and far-field characteristics of ellipse by boundary element method

作　　者：姚齐峰[1] 王帅[1] 娄小平[1] 祝连庆[1] Yao Qifeng Wang Shuai Lou Xiaoping Zhu Lianqing(Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University,Beijing 100016, China)

机构地区：[1]北京信息科技大学光电信息与仪器北京市工程研究中心,北京100016

出　　处：《电子测量与仪器学报》2017年第9期1414-1419,共6页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金面上项目-基于光纤光栅的飞机结构载荷谱构建新方法研究(54675053);长江学者和创新团队发展计划(IRT1212);北京市重大科技计划(PXM2013-014224-000077;PXM2012-014224-000019)资助项目

摘　　要：近年来各种兼具高品质因子和定向输出的变形微纳谐振腔得到广泛研究,主要是可以用在光电集成的极低阈值激光器中。通过边界元方法计算了从圆到椭圆变形过程即中模场,品质因子以及远场特性的随短半轴变化,模拟结果表明椭圆曲率越大,模式的品质因子逐渐下降,而模场由回音壁模式逐渐向法玻腔模式转化,但是在转变过程中出现因模式耦合效应导致模式品质因子的异常改变,远场出现被调制的现象,该机理为实现定向输出并且高Q值的激光器提供新的设计思路。In recent years,all kinds of deformed micro-nano cavities with high quality factor and directional output have been extensively studied,since they can be widely used for the realization of the extremely low threshold lasers in optoelectronic integrated. In this paper,we calculate the variation of mode pattern,quality factor and far field characteristics as the cavity evaluates from circular to ellipse with the changes of the short half axis changes using the boundary element method. The simulation results show that the larger the ellipse curvature is,the lower the mode quality factor,and the mode field transforms from the whispering gallery mode to the regular Fabry-perot cavity mode. However,during the deformation transformation,the mode coupling effect leads to the abnormal change of the mode quality factor,and the modulation of the far field. This mechanism provides a new design idea for the laser with both directional output and high Q value.

关 键 词：边界元法 远场特性 变形微腔 定向输出 

分 类 号：TN36[电子电信—物理电子学]