20 May 2011 Vertical transport in InAs/GaSb type-II strained layer superlattices for infrared focal plane array applications
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Abstract
In this work, we report on the measurement of vertical transport parameters in p-doped InAs/GaSb type-II superlattices for long-wavelength infrared detectors. Variable magnetic eld geometrical magnetoresistance mea- surements have been employed to extract the vertical transport parameters, since the Hall-eect technique cannot be employed in the vertical transport conguration. The room-temperature magnetoresistance measurements were performed employing a kelvin-mode set up, at electric elds not exceeding 25 V/cm and at magnetic eld intensities up to 12 T. The measured magnetoresistance, shown to exhibit multiple-carrier conduction charac- teristics, were analyzed using a high-resolution mobility spectrum analysis technique. It is shown that, at room temperature, the electrical conductivity of the sample is due to four distinct carriers, associated with the major- ity carrier holes, sidewall inversion layer electrons, and two minority carrier electrons likely associated with two distinct conduction band levels.
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G. A. Umana-Membreno, G. A. Umana-Membreno, B. Klein, B. Klein, H. Kala, H. Kala, J. Antoszewski, J. Antoszewski, G. Gautam, G. Gautam, M. N. Kutty, M. N. Kutty, E. Plis, E. Plis, J. M. Dell, J. M. Dell, S. Krishna, S. Krishna, L. Faraone, L. Faraone, } "Vertical transport in InAs/GaSb type-II strained layer superlattices for infrared focal plane array applications", Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 80120Y (20 May 2011); doi: 10.1117/12.883755; https://doi.org/10.1117/12.883755
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