Further developments of 12µm pixel dual waveband MWIR-LWIR infrared detectors using MOVPE grown MCT

Adam Greenen; Sudesh Bains; Les Hipwood; Marcus Lee; Dan Owton; Kennedy McEwen

doi:10.1117/12.2618765

27 May 2022 Further developments of 12μm pixel dual waveband MWIR-LWIR infrared detectors using MOVPE grown MCT

Adam Greenen, Sudesh Bains, Les Hipwood, Marcus Lee, Dan Owton, Kennedy McEwen

Proceedings Volume 12107, Infrared Technology and Applications XLVIII; 121070W (2022) https://doi.org/10.1117/12.2618765
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

Having established production capacity for high resolution, small pixel Mid Wave Infra-Red (MWIR) devices down to 8μm; this paper discusses the latest developments at Leonardo UK with 12μm MWIR-LWIR Dual Waveband Infra-Red (DWIR) high-performance infrared detectors, grown by Metal Organic Vapour Phase Epitaxy (MOVPE) on GaAs substrates. As with the 30μm, 24μm and 20μm mesa pixels that Leonardo UK pioneered during the early 2000’s, the 12μm devices use a “back-to-back” diode arrangement, whereby the waveband is selected by changing the bias polarity across the diode stack; thus ensuring spatial coherence between the two wavebands. The increased thickness of DWIR MCT compared to single-band material makes manufacturing the mesa structure, in order to control inter-pixel crosstalk increasingly challenging with smaller pixel pitches. Previous publications by Leonardo UK presented results of 12μm DWIR technology on a 24μm Readout Integrated Circuit (ROIC), allowing only 25% of the pixels to be assessed; in this paper, we discuss results of this material on a 12μm ROIC, enabling assessment of 100% of the pixels. Low defects together with near Background Limited Infra-red Photodetector (BLIP) performance demonstrates significant progress towards the manufacture of higher resolution, lower cost DWIR devices by Leonardo UK.

Conference Presentation

Citation Download Citation

Adam Greenen, Sudesh Bains, Les Hipwood, Marcus Lee, Dan Owton, and Kennedy McEwen "Further developments of 12μm pixel dual waveband MWIR-LWIR infrared detectors using MOVPE grown MCT", Proc. SPIE 12107, Infrared Technology and Applications XLVIII, 121070W (27 May 2022); https://doi.org/10.1117/12.2618765

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available