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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 36, Iss. 13 — Jul. 1, 2011
  • pp: 2560–2562

Type-II superlattice dual-band LWIR imager with M-barrier and Fabry–Perot resonance

Edward Kwei-wei Huang, Abbas Haddadi, Guanxi Chen, Binh-Minh Nguyen, Minh-Anh Hoang, Ryan McClintock, Mark Stegall, and Manijeh Razeghi  »View Author Affiliations


Optics Letters, Vol. 36, Issue 13, pp. 2560-2562 (2011)
http://dx.doi.org/10.1364/OL.36.002560


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Abstract

We report a high performance long-wavelength IR dual-band imager based on type-II superlattices with 100% cutoff wavelengths at 9.5 μm (blue channel) and 13 μm (red channel). Test pixels reveal background-limited behavior with specific detectivities as high as 5 × 10 11 Jones at 7.9 μm in the blue channel and 1 × 10 11 Jones at 10.2 μm in the red channel at 77 K . These performances were attributed to low dark currents thanks to the M-barrier and Fabry–Perot enhanced quantum efficiencies despite using thin 2 μm absorbing regions. In the imager, the high signal-to-noise ratio contributed to median noise equivalent temperature differences of 20 milli-Kelvin for both channels with integration times on the order of 0.5 ms, making it suitable for high speed applications.

© 2011 Optical Society of America

OCIS Codes
(040.2480) Detectors : FLIR, forward-looking infrared
(040.5160) Detectors : Photodetectors
(110.3080) Imaging systems : Infrared imaging
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Imaging Systems

History
Original Manuscript: April 22, 2011
Revised Manuscript: May 19, 2011
Manuscript Accepted: May 31, 2011
Published: June 30, 2011

Citation
Edward Kwei-wei Huang, Abbas Haddadi, Guanxi Chen, Binh-Minh Nguyen, Minh-Anh Hoang, Ryan McClintock, Mark Stegall, and Manijeh Razeghi, "Type-II superlattice dual-band LWIR imager with M-barrier and Fabry–Perot resonance," Opt. Lett. 36, 2560-2562 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-13-2560

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