太赫兹辐射
光电探测器
光电子学
量子阱红外探测器
量子阱
热辐射计
砷化镓
量子隧道
材料科学
宽带
红外线的
光子
照相混合
物理
光学
远红外激光器
激光器
探测器
太赫兹超材料
作者
H. X. Wang,Zhanglong Fu,Dixiang Shao,Zhizhen Zhang,Chang Wang,Zhiyong Tan,Xuguang Guo,Juncheng Cao
摘要
In this letter, a broadband bias-tunable terahertz (THz) quantum well infrared photodetector (QWIP) with a GaAs/AlGaAs asymmetric step multi-quantum well using the intersubband transition was proposed, designed, fabricated, and characterized. It is found that the THz QWIP has two photon response peaks at 4.5 THz and 6.5 THz and the bias-tunable photon response in the 4.0–6.5 THz frequency range of the device is attributed to the field-assisted tunneling of electrons in the second excitation subbands to continuum states.
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