Ultracompact On-chip Long-wave Photodetector Based on Hybrid Plasmonic Waveguides
An ultra-small on-chip long-wave photodetector by utilizing the thermal resistance effect of the metal strip on a hybrid plasmonic waveguide structure. When light propagates along a hybrid plasmonic waveguide, the metal strip is heated due to the light absorption. Accordingly, the resistance of the metal strip increases due to the thermal-resistance effect of metal and the resistance change can be measured accurately with a Wheatstone bridge so that the photodetector is with very high sensitivity. Owing to the nano-scale confinement of light in a hybrid plasmonic waveguide, the temperature increase of metal due to the metal absorption is enhanced in comparison with the conventional long-range plasmonic waveguide. A theoretical responsivity of as high as 74mV/mW is obtained with a low bias voltage of 1 V. The photodetector also has a fast response (<1 μs) and works in a very broad wavelength range (e.g., 1.5~7.5μm).
Hao Wu Xiaowei Guan Daoxin Dai
State Key Laboratory for Modern Optical Instrumentation Centre for Optical and Electromagnetic Research Zhejiang Provincial Key Laboratory for Sensing Technologies Zhejiang University, Zijingang Campus, Hangzhou 310058, China
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
320-323
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）