Sung Ho Hwang Jae Gu Lim Jin Dong Song Jae Cheol Shin Du Chang Heo 최원준 2024-01-20T05:34:09Z 2024-01-20T05:34:09Z 2022-01-10 2015-11 1225-8822 https://pubs.kist.re.kr/handle/201004/124790 We report on GaAs/AlGaAs quantum well infrared photodetectors (QWIPs) that can cover the spectral range of 3.6-25 μm. One advantage of the GaAs QWIPs is the wavelength tenability as a function of their structural parameters. We have performed a systematic calculation on the detection wavelength of a typical GaAs/AlxGa1-xAs multi-quantum-well photodetector, with the aluminum mole fraction (x) of AlxGa1-xAs barrier in the range of 0.15- 0.43 and the quantum-well width range from 30 to 60 ？. Design and fabrication of a QWIP based on GaAs/Al0.23Ga0.77As structure with 37 ？-thick well width has been carried out. The calculated operation wavelength of the QWIP is in a good agreement with the experimental data taken by photo response and activation energy calculation from thermal quenching of integrated photoluminescence. English 한국진공학회 Investigation of detection wavelength of Quantum Well Infrared-Photodetector Article 10.5757/ASCT.2015.24.6.257 2 한국진공학회지, v.24, no.6, pp.257 - 261 한국진공학회지 24 6 257 261 N kci ART002053322 Quantum well Infrared Photodetector QWIP