Author Affiliations
Abstract
College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
In this paper, we propose a compact plasmonic sensor structure comprised of a metal-dielectric-metal (MDM) waveguide, and a baffle plate in waveguide core and two side-coupled rectangular cavities. In this structure, two Fano resonances are achieved and can be tuned independently by changing the structural parameters of the cavities. Especially, when the resonant wavelengths of the two Fano resonances are the same, the sensing sensitivity can be enhanced by coupling between two Fano resonances. By investigating the transmission spectrum, the effect of structural parameters on Fano resonances and the refractive index sensitivity of the sensor structure are analyzed in detail. The numerical simulations demonstrate a sensitivity as high as 1295nm/RIU and a figure of merit of 1647.
Fano resonance MDM waveguide sensor Photonic Sensors
2019, 9(3): 205
上海理工大学 光电信息与计算机工程学院, 上海 200093
数值研究了非相干光反馈时半导体激光器输出功率随反馈系数的变化关系以及待测物体离焦量与反馈系数的关系。提出了基于非相干光反馈的表面轮廓测量系统, 并实验验证了系统的可行性, 完成了对一元硬币的二维平面扫描成像, 并分析了实验结果中的误差以及可能影响测量结果的主要因素。
光学测量 非接触测量 光反馈 轮廓测量 optical measurement contactless measurement optical feedback profile measurement
