论文标题
基于极性步骤量子井的5.7 THz GAN/Algan量子级联检测器
A 5.7 THz GaN/AlGaN quantum cascade detector based on polar step quantum wells
论文作者
论文摘要
我们报告在Terahertz光谱范围内运行的GAN/Algan量子级联检测器。该设备是通过在C-Sapphire底物上的金属有机化学蒸气沉积生长的，并依赖于极地GAN/ALGAN步骤量子井。活动区域厚度在千分尺范围内。结构，电和光学研究证明了合成氮化物材料的高结构质量。检测器在5.7 THz（23.6 MeV）处表现出峰值光电流，在表面正常照射下通过10 um的光栅，在10 K时的响应性为0.1 mA/w。光电流持续到20 k。
We report on a GaN/AlGaN quantum cascade detector operating in the terahertz spectral range. The device was grown by metal organic chemical vapor deposition on a c-sapphire substrate and relies on polar GaN/AlGaN step quantum wells. The active region thickness is in micrometer range. The structural, electrical and optical investigations attest of high structural quality of the synthetized nitride material. The detector exhibits a peak photocurrent at 5.7 THz (23.6 meV) with a responsivity of 0.1 mA/W at 10 K under surface normal irradiation through a 10 um period grating. The photocurrent persists up to 20 K.
