High performance, room temperature, broadband II-VI quantum cascade detector

作者：Ravikumar Arvind P^*; De Jesus Joel; Tamargo Maria C; Gmachl Claire F

来源：Applied Physics Letters, 2015, 107(14): 141105.

DOI：10.1063/1.4932538

We report on the experimental demonstration of a room temperature, II-VI, ZnCdSe/ZnCdMgSe, broadband Quantum Cascade detector. The detector consists of 30 periods of 2 interleaved active-absorption regions centered at wavelengths 4.8 mu m and 5.8 mu m, respectively. A broad and smooth photocurrent spectrum between 3.3 mu m and 6 mu m spanning a width of 1030 cm(-1) measured at 10% above baseline was obtained up to 280 K, corresponding to a Delta E/E of 47%. Calibrated blackbody responsivity measurements show a measured peak responsivity of 40 mA/W at 80K. corresponding to a detectivity of about 3.1 x 10(10) cm root Hz/W. Bias dependent photocurrent measurements revealed no significant change in the spectral shape, suggesting an impedance matched structure between the different active regions.

• 出版日期2015-10-5