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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Resonant cavity enhanced photodiodes on GaSb for the mid-wave infrared
AU - Craig, A.P.
AU - Al-Saymari, F.
AU - Jain, M.
AU - Bainbridge, A.
AU - Savich, G.R.
AU - Golding, T.
AU - Krier, A.
AU - Wicks, G.W.
AU - Marshall, A.R.
PY - 2019/4/15
Y1 - 2019/4/15
N2 - We report the design, growth, processing, and characterization of resonant cavity enhanced photodiodes for the midwave infrared at ∼3.72 μm on GaSb. Using AlAsSb/GaSb mirrors, AlAsSb barrier and spacer layers and a thin 96 nm InAsSb absorber, we observed dark current and detectivity behavior superior to common InAsSb nBn detectors in the literature, with peak specific detectivity values of 8 × 10 10 and 1 × 10 10 cm Hz 1 / 2 W - 1 measured at 250 K and 300 K, respectively. In the same temperature range, the linewidth of the detector response was 60% where the enhancement due to the resonant cavity was ∼20x. We estimate that the devices can operate close to, or slightly above, the background-limited infrared performance limit imposed on broadband detectors for a 300 K scene.
AB - We report the design, growth, processing, and characterization of resonant cavity enhanced photodiodes for the midwave infrared at ∼3.72 μm on GaSb. Using AlAsSb/GaSb mirrors, AlAsSb barrier and spacer layers and a thin 96 nm InAsSb absorber, we observed dark current and detectivity behavior superior to common InAsSb nBn detectors in the literature, with peak specific detectivity values of 8 × 10 10 and 1 × 10 10 cm Hz 1 / 2 W - 1 measured at 250 K and 300 K, respectively. In the same temperature range, the linewidth of the detector response was 60% where the enhancement due to the resonant cavity was ∼20x. We estimate that the devices can operate close to, or slightly above, the background-limited infrared performance limit imposed on broadband detectors for a 300 K scene.
U2 - 10.1063/1.5082895
DO - 10.1063/1.5082895
M3 - Journal article
VL - 114
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 15
M1 - 151107
ER -