太赫兹量子级联激光器与量子阱探测器研究进展(特邀)  

Recent Progress in Terahertz Quantum Cascade Lasers and Quantum Well Detectors(Invited)

作　　者：曹俊诚[1] 韩英军[1] Cao Juncheng;Han Yingjun(National Key Laboratory of Materials for Integrated Circuits,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China)

机构地区：[1]中国科学院上海微系统与信息技术研究所集成电路材料全国重点实验室,上海200050

出　　处：《中国激光》2024年第1期369-384,共16页Chinese Journal of Lasers

基　　金：国家自然科学基金重大科研仪器研制项目(61927813);国家自然科学基金重点项目(12333012);中国科学院上海微系统与信息技术研究所自主部署项目(552022000306)。

摘　　要：太赫兹量子级联激光器和太赫兹量子阱探测器都是基于子带间电子跃迁的半导体器件,具有体积小、频率可调、响应速度快等优点。其工作波长位于微波波长和红外波长之间,其光谱涵盖了众多气体分子、化合物以及凝聚态物质的频谱特征,在天文观测、公共安全、生物医药等领域中有重大应用前景。近年来,太赫兹量子级联激光器和太赫兹量子阱探测器的性能有了显著提高,其应用也受到关注。回顾了太赫兹量子级联激光器和量子阱探测器的发展历程,简述了其工作原理和器件结构,介绍了器件性能在工作温度、光谱范围等方面的最新进展及其在高分辨光谱、太赫兹成像、无线宽带通信等方面的应用,并在此基础上分析了目前存在的问题和研究热点,对其未来发展进行了展望。Significance Generally,the terahertz(THz)radiation spectrum is defined as the electromagnetic spectrum between 100 GHz to 30 THz(wavelength of 3 mm‒10μm).THz waves have a wide bandwidth and low photon energy,their energy spectra cover the vibrational-rotational characteristics of numerous molecules,and THz waves can penetrate many non-polar media.These properties make them attractive for astronomical observations,public safety,biomedicine,and wireless communication.According to the different generation and detection methods of THz waves,THz technology can be divided into two categories:one is based on electronic technology-mainly related to microwaves in the low-frequency THz band,and the other is based on optical and photonics technology-mainly related to infrared light at higher frequencies.Further technical developments will bridge the gap between electronics and optics,enabling new THz spectroscopy and imaging methods for scientific exploration in physics,chemistry,biology,materials,devices,engineering,and other interdisciplinary fields.Terahertz quantum cascade lasers(THz QCLs)and terahertz quantum-well photodetectors(THz QWPs)are semiconductor devices based on electron transitions within subbands.These devices are advantageous due to their small size,adjustable frequency,and fast response time.Over the past few years,their performance has improved and many techniques related to high-resolution spectroscopy,terahertz imaging,and wireless broadband communication have received considerable attention.Here,we review recent advances and discuss future research directions.Progress THz QCLs are the only practical and compact laser systems at this frequency and have significant impacts on the THz field.The first THz QCL was developed in 2002.After more than 20 years of development,device performance has made significant progress,including the emission frequency range from 1.2 THz to 5.6 THz,the maximum output power of 2.4 W,a single mode continuously tuning range of 650 GHz,a broad bandwidth of 2.6 THz,the maximu

关 键 词：光学器件 太赫兹技术 量子级联激光器 量子阱探测器 

分 类 号：TN219[电子电信—物理电子学] TN248.4TN215TN92