A three‐well quantum well infrared photodetector

摘要: A simplified quantum well infrared photodetector (S‐QWIP) has been designed and demonstrated which shows very high performance. The S‐QWIP is to have only three wells with detection peak wavelengths at 7.3, 8.3, 10 μm, for the first, second, third well, respectively. two barriers between are graded block dark current effectively when reverse bias applied. It also produces a built‐in potential in structure photovoltaic (PV) effect. end different widths so that electron transport can be compared directions changed. responsivity of photoreponse peaks zero (PV effect) migrates one wide increases. device BLIP 85 K within operable range. greatly enhanced higher temperature small bias. conversion efficiency photon absorption photocurrent calculated conservatively b...