Abstract

A quantum dot infrared (IR) photodetector based on intraband optical transitions among the various states within the valence band by considering the principle of electromagnetically induced transparency (EIT) is proposed and theoretically investigated. Absorption spectra of the probe beam and its dependence on the control beam and IR signal under the conditions of EIT have been studied. The incident IR signal itself does not generate any photocurrent. However, profound modification of the absorption characteristics of the probe beam by incident IR signal intensity leads to photocurrent generation in the proposed photodetector. Thermal characterization of the photodetector has been carried out through the evaluation of the temperature dependence of the quantum efficiency of the device.

© 2014 Optical Society of America

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