Design of resonant tunneling barriers for reduction in the dark current in quantum dots-in-a-well infrared photodetectors

Abstract

Reduction in the dark current and wavelength selective extraction of the photocarriers in a quantum dots in a well structure using resonant tunneling barriers has been demonstrated. The passband of the two resonant tunneling barriers has been designed to extract longwave and midwave peaks respectively. Substantial reduction in the dark currents and increase in the detectivity has been obtained.