ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
For the first time, resonant parallel photoconductivity due to intraband optical transitions is observed in GaAs/AlGaAs multiquantum wells. The angle of incidence dependence of the detected signals indicates that the photoconductivity process is not directly related to intersubband transitions. Indeed, contrary to usual detectors based on intersubband transitions, infrared radiations are detected at normal incidence with responsivity as high as (0.05 A/W). Photoconductivity spectra reproduce roughly the absorption spectra with, however, significant differences in peak positions, indicating that the intersubband transitions are indirectly involved in the detection process. Elements of an explanatory model based on hot-electron bolometric effects are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.104831
