A. Rostami, M. Zyaei, and H. Saghi (Iran)
Terahertz photodetector, Electromagnetically Induced Transparency (EIT), room temperature
A novel room temperature terahertz photodetector based on EIT is proposed. The main idea for operation in room temperature and THz ranges is related to convert the incoming long-wavelength IR signal to short-wavelength field through EIT phenomena. For realization of the idea we use 4-level quantum well structure. In the proposed structure the electromagnetic field of terahertz-infrared radiation interfere with the electromagnetic field of short wavelength probe field and this effect modifies the absorption characteristic of probe field. This means that the terahertz detection is translated to short-wavelength detection which has small dark current. So, the proposed idea is appropriate for terahertz and high temperature applications.
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