二维光子晶体非对称Mach-Zehnder自准直传感器研究  

Investigation on Two-dimensional Photonic Crystal Asymmetric Mach-Zehnder Self-collimation Sensor

作　　者：王宇飞[1] 邱怡申[2,3] 陈曦曜[4] 强则煊[2,3] 赖国忠[1] 邱晖晔[1] 

机构地区：[1]龙岩学院物理与机电工程学院,福建龙岩364012 [2]福建师范大学医学光电科学与技术教育部重点实验室,福州350007 [3]福建师范大学光子技术福建省重点实验室,福州350007 [4]闽江学院物理学与电子信息工程系,福州350108

出　　处：《光子学报》2009年第8期1958-1961,共4页Acta Photonica Sinica

基　　金：福建省自然科学基金(T0750009)资助

摘　　要：基于自准直效应,通过在二维空气柱型光子晶体非对称Mach-Zehnder干涉仪长臂上设置传感区域,设计了一种自准直传感器.平面波展开法确定了入射光的自准直频率范围,时域有限差分法分析了传感器的灵敏度达到68nm/RIU,采用单频光入射实现了传感模拟.该传感器完全依赖自准直导光,无需引入任何缺陷波导,大大降低了制作工艺要求,其大小只有十几个微米,能够满足超紧凑、高灵敏度、廉价和无标记的要求.A new asymmetric Mach-Zehnder interferometer sensor is proposed based on the self-collimation effect of two-dimensional air-cylinder photonic crystal by introducing a sensing area in the longer branch.Self-collimation frequency range is confirmed by employing the plane wave expansion method.Two-dimensional finite-difference time-domain technique is used in this work.68 nm/RIU sensitivity can be achieved.The simulated performance is realized by the incidence of single frequency light.The proposed photonic crystal sensor is defect free configuration and thus reduce the fabrication difficulty.The dimensions of such sensor are no more than twenty microns.It is desirable to perform ultra-compact,highly-sensitive,low-cost label-free sensor and may be applied to photonic integrated circuits.

关 键 词：光子晶体 自准直 传感器 光子集成芯片 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]