Dots, QWISPs, and BIRDs

Ting, David Z.; Bandara, S. V.; Mumolo, Jason M.; Keo, Sam A.; Nguyen, Jean; Liu, H.C.; Song, C. Y.; Chang, Yia‐Chung; Rafol, Sir B.; Hill, Cory J.; Gunapala, Sarath D.; Soibel, Alexander; Liu, John K.; Blazejewski, E. R.

doi:10.1016/j.infrared.2009.05.020

Cited by 11 publications

(5 citation statements)

References 29 publications

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“…The superlattice band structure [13], Fig. 1, assists in the explanation of why conventionally-used dark current models fit well for higher temperatures, but not lower temperatures.…”

Section: Effective Density Of States In the Valence Bandmentioning

confidence: 72%

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Dark current analysis of InAs/GaSb superlattices at low temperatures

Nguyen

Ting

Hill

et al. 2009

Infrared Physics & Technology

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“…The superlattice band structure [13], Fig. 1, assists in the explanation of why conventionally-used dark current models fit well for higher temperatures, but not lower temperatures.…”

Section: Effective Density Of States In the Valence Bandmentioning

confidence: 72%

“…Finally, SLS3 is a superlattice heterostructure based infrared detector (BIRD) structure as reported in Ref. [13]. R 0 A values for the three devices at T = 77 K were 40 X cm 2 , 102.1 X cm 2 , and 2423.68 X cm 2 .…”

Section: Resultsmentioning

confidence: 99%

Dark current analysis of InAs/GaSb superlattices at low temperatures

Nguyen

Ting

Hill

et al. 2009

Infrared Physics & Technology

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“…A particularly useful heterostructure construct is the unipolar barrier. The term ''unipolar barrier'' was introduced recently to describe a barrier that can block one carrier type (electron or hole) but allows the un-impeded flow of the other [18,34,35]. The concept of the unipolar barriers existed long before they were called as such.…”

Section: Simentioning

confidence: 99%

Antimonide superlattice complementary barrier infrared detector (CBIRD)

Ting

Soibel

Hill

et al. 2011

Infrared Physics & Technology

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“…A particularly useful heterostructure construct is the unipolar barrier. The term "unipolar barrier" was coined recently to describe a barrier that can block one carrier type (electron or hole) but allows the un-impeded flow of the other [18,19,20], as illustrated in Figure 2. The concept of the unipolar barrier has been around long before they are called as such.…”

Section: Unipolar Barriersmentioning

confidence: 99%

Antimonide-based barrier infrared detectors

et al. 2010

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The nearly lattice-matched InAs/GaSb/AlSb (antimonide) material system offers tremendous flexibility in realizing high-performance infrared detectors. Antimonide-based alloy and superlattice infrared absorbers can be customized to have cutoff wavelengths ranging from the short wave infrared (SWIR) to the very long wave infrared (VLWIR). They can be used in constructing sophisticated heterostructures to enable advanced infrared photodetector designs. In particular, they facilitate the construction of unipolar barriers, which can block one carrier type but allow the unimpeded flow of the other. Unipolar barriers are used to implement the barrier infra-red detector (BIRD) design for increasing the collection efficiency of photo-generated carriers, and reducing dark current generation without impeding photocurrent flow. We report our recent efforts in achieving state-of-the-art performance in antimonide alloy and superlattice based infrared photodetectors using the BIRD architecture. Specifically, we report a 10 µm cutoff superlattice device based on a complementary barrier infrared detector (CBIRD) design. The detector, without antireflection coating or passivation, exhibits a responsivity of 1.5 A/W and a dark current density of 1×10 -5 A/cm 2 at 77K under 0.2 V bias. It reaches 300 K background limited infrared photodetection (BLIP) operation at 87 K, with a blackbody BLIP D* value of 1.1×10 11 cm-Hz 1/2 /W for f/2 optics under 0.2 V bias.

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Dots, QWISPs, and BIRDs

Cited by 11 publications

References 29 publications

Dark current analysis of InAs/GaSb superlattices at low temperatures

Dark current analysis of InAs/GaSb superlattices at low temperatures

Antimonide superlattice complementary barrier infrared detector (CBIRD)

Antimonide-based barrier infrared detectors

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