Author Affiliations
Abstract
1 Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
2 Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
A counter-surface plasmon polariton lens (CSPPL) is proposed to perform stable nanoparticle trapping by providing up to 120kbT optical potential depth. The optical potential depth is related to the incident angle and phase difference of the light incident on two gratings of CSPPL. The depth of optical potential can be manipulated with negligible displacement by the incident angle less than 20°. Both the depth and the center position of the optical potential well can be manipulated by the incident phase difference. The study of stable and manipulatable optical potential on the CSPPL promotes the integration of optical tweezers.
optical tweezers surface plasmon polaritons optical potential interference Chinese Optics Letters
2022, 20(2): 023601
1 南京邮电大学量子信息技术研究所，江苏 南京 210003
2 南京邮电大学宽带无线与传感网技术教育部重点实验室，江苏 南京 210003
为了实现高集成度和高稳定性的三维光学芯片，必须对三维空间波导的耦合特性进行系统研究。本文主要研究三维集成光学芯片中波导之间的耦合问题。通过全波仿真的方法数值模拟波导阵列在不同架构下的电场分布，并分析平行波导间和交叉波导间的耦合效率与波导间距、周围介质折射率、工作波长和夹角之间的关系。在平行波导中，当两个SiO2基片上波导之间的中心间距为0.76 μm和耦合长度为72.5 μm时，垂直方向上波导间的耦合效率达到0.997。在交叉波导中，波导之间的耦合效率对波导夹角很敏感，当夹角大于10°时，波导间不发生耦合，可以通过调整波导间的夹角来控制波导之间的耦合。
光学器件 集成波导 光学芯片 耦合效率 波导模式 激光与光电子学进展
2021, 58(19): 1923001
