Long wave length infrared photo detector design bared on electromagnetic transpire

Subject Areas : Communication

مجید  ضیائی شیشوان ¹ ()
Ali  Rostami ² ()

Received: 2010-09-11 Accepted : 2010-12-11 Published : 2010-03-01

Keywords: Electromagnetic Transparency, Infrared Photo Detector, Quantum Wells, Quantum Dots,

Abstract :

In this paper a novel long-wavelength infrared (IR) photodetector based on Electromagneticlly induced transparency (EIT) is proposed. This kind of photo-detectors is suitable for operation in room temperature and terahertz range (low level signal) detection. Main idea for operation in the room temperature is related to convert the incoming long-wave length IR signal to short-wave length or visible probe field through EIT phenomena. Realization of the idea implemented with using atomic states (that can be simulated by introducing quantum wells or dots). In the proposed structure long-wave length IR signal dose not directly interact with electrons, but affects the absorption characteristic of short-wave length or visible probe field. Therefore; the introduced structure reduces and/or cancels out the thermionic dark current component and can operate as a long-wave length photo detector