Author Affiliations
Abstract
1 Shanghai Key Laboratory of Modern Optical System and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for Science and Technology, Shanghai 200093, China
2 Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Optical frequency combs, which are generated by the cascade of a phase modulator and a Mach–Zehnder intensity modulator, are used as a polychromatic signal source in the terahertz imaging system to improve imaging quality. The interference effect caused by the monochromatic wave has been greatly suppressed. The required optical power in the presented system is as low as ~30% of that in the system using the Er-doped fiber amplifier as a source, which can reduce cost and protect photodiodes from damage. This work provides an effective, low power consumption, low cost, and easy way to realize terahertz imaging with high quality and can be used in future security inspections.
110.6795 Terahertz imaging Chinese Optics Letters
2019, 17(4): 041101
1 上海理工大学光电信息与计算机工程学院, 上海 200093
2 中国科学院上海微系统与信息技术研究所太赫兹固态技术重点实验室, 上海 200050
设计了一种太赫兹量子阱光电探测器(THz-QWP),并利用该器件研究了多体效应。通过表征和分析器件的光电流谱,发现多体效应改变了器件的峰值响应频率,并且引起了双响应峰现象,从而验证了多体效应能加深有效势阱深度并增大基带与第一激发能级态之间的间距。因此,在THz-QWP的结构设计中,考虑多体效应具有重要意义。
探测器 太赫兹 量子阱 多体效应 光电探测器 光学学报
2017, 37(10): 1004001