Performance of long-wave infrared InAs/GaSb strained layer superlattice detectors for the space applications

Elena A. Plis; N. Gautam; M. N. Kutty; S. Myers; B. Klein; T. Schuler-Sandy; M. Naydenkov; S. Krishna

doi:10.1117/12.893706

31 August 2011 Performance of long-wave infrared InAs/GaSb strained layer superlattice detectors for the space applications

Elena A. Plis, N. Gautam, M. N. Kutty, S. Myers, B. Klein, T. Schuler-Sandy, M. Naydenkov, S. Krishna

Author Affiliations +

Proceedings Volume 8164, Nanophotonics and Macrophotonics for Space Environments V; 81640S (2011) https://doi.org/10.1117/12.893706
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

We present our efforts on development of high performance low noise, long-wave infrared (LWIR) and multicolor detectors based on the InAs/GaSb strained layer material (SLS) material system. The LWIR SLS detector with PbIbN architecture showed improved performance over the conventional PIN design due to unipolar current blocking layers. At 77K and V_b=-0.25V, a responsivity of 1.8 A/W, dark current density of 1.2 mA/cm², quantum efficiency of 23% and shot noise limited detectivity (D*) of 8.7×10¹⁰ Jones (λ_c = 10.8 μm) has been observed. Dual band response was registered with 50% cut-off wavelengths of 5μm and 10μm from an SLS detector with the pBp design. The responsivity equal to 1.6 A/W (at λ = 5 μm and V_b = +0.4 V) and 1.8 A/W (at λ = 9 μm and V_b = -0.7 V) for MWIR and LWIR absorbers was achieved with corresponding values of specific detectivity 5 x 10¹¹ Jones and 2.6 x 10¹⁰ Jones, respectively. The maximum values of quantum efficiency were estimated to 41% (MWIR) and 25% (LWIR) at V_b = +0.4V and V_b = -0.7V. Moreover, the diffusion-limited behavior of dark current at higher temperatures was observed for the MWIR absorber for pBp detector. Finally, three-color response was registered from three contact device with nBn architecture for SWIR and MWIR and heterojunction PIbN architecture for LWIR detection (NbNbiP). At 77K, the cut-off wavelength for SWIR, MWIR and LWIR regions have been observed as 3.0 μm, 4.7 μm, and 10.1 μm respectively. At the same temperature, D* of 1.4 × 10¹⁰ Jones, 1.8 × 10¹⁰ Jones and 1.5 × 10⁹ Jones for SWIR, MWIR and LWIR signals has been observed.

Citation Download Citation

Elena A. Plis, N. Gautam, M. N. Kutty, S. Myers, B. Klein, T. Schuler-Sandy, M. Naydenkov, and S. Krishna "Performance of long-wave infrared InAs/GaSb strained layer superlattice detectors for the space applications", Proc. SPIE 8164, Nanophotonics and Macrophotonics for Space Environments V, 81640S (31 August 2011); https://doi.org/10.1117/12.893706

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