Abstract
We present an extensive characterization of the minority carrier transport properties in an nBn mid-wave infrared detector incorporating a Ga-free InAs/InAsSb type-II superlattice as the absorbing region. Using a modified electron beam induced current technique in conjunction with time-resolved photoluminescence, we were able to determine several important transport parameters of the absorber region in the device, which uses a barrier layer to reduce dark current. For a device at liquid He temperatures, we report a minority carrier diffusion length of 750 nm and a minority carrier lifetime of 200 ns, with a vertical diffusivity of 3 × 10-2 cm2/s. We also report on the device's optical response characteristics at 78 K.
Original language | English (US) |
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Article number | 071107 |
Journal | Applied Physics Letters |
Volume | 106 |
Issue number | 7 |
DOIs | |
State | Published - Feb 16 2015 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)