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Evaluation of low temperature response of HgCdTe quantum dot based MWIR FPA

Chatterjee, A and Babu, N and Rao, KSRK (2020) Evaluation of low temperature response of HgCdTe quantum dot based MWIR FPA. In: AIP Conference Proceedings, 30 - 31 January 2020, Namakkal.

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Official URL: https://doi.org/10.1063/5.0007505


his paper reports development of Mid Wave Infrared (MWIR) Focal Plane Array (FPA) using chemically synthesized Mercury Cadmium Telluride (Hg1-xCdxTe) semiconductor Colloidal Quantum Dots (CQD) coated over 320×256 pixels silicon Readout Integrated Circuit (ROIC), having significant photo-response in the MWIR spectral band (λ = 2.5μm to 5.0μm) at room temperature and variation of photo-response at lower operating temperature (120K to 260K). HgCdTe CQD has been synthesized chemically. We have characterized the optical performance of the developed sensor using calibrated Black Body Source and infrared lamps along with optical high pass filter (λCutoff = 2.1μm) to understand its response against MWIR radiation at different operating temperature as an introductory step towards development of MWIR FPA sensitive in MWIR region and determination of optimum operating condition to achieve higher specific detectivity (D*). Optical response of the indigenously developed FPA has been evaluated inside a cryostat having optical window at different temperatures lower than ambient and peak response is found to be at T=140K.

Item Type: Conference Paper
Publication: AIP Conference Proceedings
Publisher: American Institute of Physics Inc.
Additional Information: The copyright for this article belongs to American Institute of Physics Inc.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 06 Feb 2023 09:16
Last Modified: 06 Feb 2023 09:16
URI: https://eprints.iisc.ac.in/id/eprint/79906

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