SCD is a leading manufacturer of MWIR InSb Focal Plane Arrays (FPA) with formats up to 3 megapixels. Using photodiode layers grown by Molecular Beam Epitaxy (MBE), the operating temperature is raised to ∼ 100 K, compared with 80 K for our legacy implanted junction technology. Due to the excellent manufacturability of III-V MBE materials, we have extended this approach in the development of our newer High Operating Temperature (HOT) MWIR technologies, all of which are based on XBn and XBp barrier devices which suppress the dark current generated by traps in the depletion layer. As a result we now produce a family of InAsSb XBn FPAs operating at 150 K with a cut-off wavelength of λC = 4.2 μm. Formats range between 0.33 megapixels and 5.24 megapixels and our latest "Crane" FPA has a pitch of just 5 μm. These detectors are ideal for 24/7 surveillance and long-range applications, due to large formats, increased HOT cooler reliability and very high atmospheric transmission. For applications requiring HOT full MWIR (HFMW) performance (λC = ∼ 4.9 μm), we have explored three approaches, all of which have produced operating temperatures in the range 115 - 125 K with high FPA operability and uniformity. Using a suitable design of buffer layer, we have extended the InAsSb XBn cut-off wavelength while maintaining a high quantum efficiency above 70%. Comparable performance has also been obtained in two lattice matched type II superlattice (T2SL) architectures: XBn InAs/InAsSb and XBp InAs/GaSb. The three technologies give great flexibility in design optimization, and initial production of HFMW detectors is scheduled for mid 2022.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
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.