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Laser Co2 Radiation Detection Using QWIP

Wail Y. Nassir وائل ياس نصر

DIYALA JOURNAL OF ENGINEERING SCIENCES مجلة ديالى للعلوم الهندسية
ISSN: 19998716/26166909 Year: 2018 Volume: 11 Issue: 1 Pages: 1-5
Publisher: Diyala University جامعة ديالى

Abstract

Quantum well infrared photodetector (QWIP) become one of the important devices recently for their efficient, stability, uniformity, and high intrinsic speed. The photodetector was designed, and the validity, absorption coefficient, and band transitions are studied extensively. The quantum wells included in this research operate in mid infrared wavelength region (9-11 µm). Results showed that peak absorption coefficient at (10.6 μm) is (9000 cm-1) for Bound – bound transition and is more narrow and intense from bound- continuum transition (1800 cm-1) and the quantum well based devices can be used to detect such wavelength providing that the external electric field stays below a reasonable value. This makes such device a promising solution for MIR applications.

Keywords

Quantum wells --- Photo detector --- Infrared radiation.