Abstract

Cyclotron resonance (CR) of electrons confined in an InAsZAlo.5Gao.5Sb quantum well has been used to investigate the negative persistent photo-effect (NPP) at low temperatures. After an in situ cross-gap light illumination, the electron density is reduced 28%, and the CR effective mass decreases from (0.0342±0.0002)mo to (0.0322±0.0002)mo. The response time of the NPP build-up transient has been studied via the photon-dose technique, and it is on the order of 10 msec with an illumination power flux of ~ 10mW/cm2.

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