High operating temperature interband cascade midwave infrared detector based on type-II InAs/GaSb strained layer superlattice

Gautam, Nutan; Myers, Stephen; Barve, Ajit V.; Klein, Brianna; Smith, E. P. G.; Rhiger, David R.; Dawson, L. R.; Krishna, S.

doi:10.1063/1.4733660

Cited by 102 publications

(47 citation statements)

References 16 publications

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“…In addition, the photo-response of these detectors was strongly dependent on bias, indicating that further research and device optimization are necessary. Two-stage ICIPs in the long-wavelength infrared (LWIR) spectrum (8)(9)(10)(11)(12) lm) were able to operate at higher temperatures (up to 250 K) with an extended cutoff wavelength of $12 lm. At 78 K, these LWIR detectors had a bias-independent photocurrent, with an R 0 A of 115 X cm 2 .…”

Section: B S T R a C Tmentioning

confidence: 99%

“…Theoretical calculations [1,2] and experimental results [3,4] indicate that type-II InAs/Ga(In)Sb superlattice (SL) photodetectors are a promising alternative to mercury cadmium telluride (MCT) detectors, especially in the long-wavelength infrared (8)(9)(10)(11)(12) lm) and very-long-wavelength infrared (12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) lm) regions. For this SL material, the absorption coefficient near the band-edge is reduced as the cutoff wavelength of the material is made longer.…”

Section: Introductionmentioning

confidence: 99%

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Interband cascade infrared photodetectors with long and very-long cutoff wavelengths

Lotfi

Hao

et al. 2015

Infrared Physics & Technology

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h i g h l i g h t s VLWIR and LWIR interband cascade infrared photodetectors are grown and fabricated. High temperature operation of LWIR and VLWIR interband cascade infrared photodetectors is demonstrated. Characteristics of detectors in a wide temperature range are discussed. Bias-dependent behavior of these detectors is presented. a b s t r a c tWe report our recent studies of interband cascade infrared photodetectors (ICIPs) with 100% cutoff wavelengths of 16.0 lm and 9.2 lm at 78 K. The very-long-wavelength infrared (VLWIR) detectors were able to operate at temperatures up to 143 K. Relatively high dark current densities were observed from these VLWIR detectors. This was attributed to the very narrow bandgap and possibly to defects in the materials. In addition, the photo-response of these detectors was strongly dependent on bias, indicating that further research and device optimization are necessary. Two-stage ICIPs in the long-wavelength infrared (LWIR) spectrum (8-12 lm) were able to operate at higher temperatures (up to 250 K) with an extended cutoff wavelength of $12 lm. At 78 K, these LWIR detectors had a bias-independent photocurrent, with an R 0 A of 115 X cm 2 . This corresponded to a Johnson-noise-limited D ⁄ of 4.4 Â 10 10 cm Hz 1/2 /W at 8.0 lm. Ó 2014 Published by Elsevier B.V.

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Section: B S T R a C Tmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interband cascade infrared photodetectors with long and very-long cutoff wavelengths

Lotfi

Hao

et al. 2015

Infrared Physics & Technology

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“…Recent improvements in the maturation of growth and fabrication process technologies, design of process tools and optics, reproducibility and yield, and spatial uniformity of final FPA devices have enabled and facilitated the transition to larger format FPAs [51,111]. FPAs having resolutions up to 1024 × 1024 with pixel pitches 18 μm and smaller have been developed [48][49][50][51].…”

Section: Large Format Fpasmentioning

confidence: 99%

Design and Development of Two-Dimensional Strained Layer Superlattice (SLS) Detector Arrays for IR Applications

Sood¹,

Zeller²,

Welser³

et al. 2018

Two-Dimensional Materials for Photodetector

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The implementation of strained layer superlattices (SLS) for detection of infrared (IR) radiation has enabled compact, high performance IR detectors and two-dimensional focal plane arrays (FPAs). Since initially proposed three decades ago, SLS detectors exploiting type II band structures existing in the InAs/GaSb material system have become integral components in high resolution thermal detection and imaging systems. The extensive technological progress occurring in this area is attributed in part to the band structure flexibility offered by the nearly lattice-matched InAs/AlSb/Ga(In)Sb material system, enabling the operating IR wavelength range to be tailored through adjustment of the constituent strained layer compositions and/or thicknesses. This has led to the development of many advanced type II SLS device concepts and architectures for low-noise detectors and FPAs operating from the short-wavelength infrared (SWIR) to very long-wavelength infrared (VLWIR) bands. These include double heterostructures and unipolar-barrier structures such as graded-gap M-, W-, and N-structures, nBn, pMp, and pBn detectors, and complementary barrier infrared detector (CBIRD) and pBiBn designs. These diverse type II SLS detector architectures have provided researchers with expanded capabilities to optimize detector and FPA performance to further benefit a broad range of electrooptical/IR applications.

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“…2, 2013 P. Martyniuk -50 mV is 2.8×10 -2 A/cm 2 at 300 K, and the extracted R 0 A is 1.9 Wcm 2 , corresponding to a Johnson−noise limited D * of 2×10 9 Jones at 4.5 μm. Modification of the MWIR detector structure has been proposed by Gautam et al [62]. A cartoon representation of one stage of the cascade detector is shown in Fig.…”

Section: Cascade Infrared Detectorsmentioning

confidence: 99%

“…Recently has been appeared that for near−room tempera− ture detector operation more promising are bipolar devices based on type−II InAs/GaSb interband (IB) supperlattice (SL) absorbers [59][60][61][62][63]. These interband cascade detectors combine the advantages of interband optical transitions with the excellent carrier transport properties of the interband cascade laser structures.…”

Section: Cascade Infrared Detectorsmentioning

confidence: 99%

HOT infrared photodetectors

Martyniuk

Rogalski

2013

Opto-Electronics Review

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At present, uncooled thermal detector focal plane arrays are successfully used in staring thermal imagers. However, the performance of thermal detectors is modest, they suffer from slow response and they are not very useful in applications requiring multispectral detection.Infrared (IR) photon detectors are typically operated at cryogenic temperatures to decrease the noise of the detector arising from various mechanisms associated with the narrow band gap. There are considerable efforts to decrease system cost, size, weight, and power consumption to increase the operating temperature in so-called high-operating-temperature (HOT) detectors. Initial efforts were concentrated on photoconductors and photoelectromagnetic detectors. Next, several ways to achieve HOT detector operation have been elaborated including non-equilibrium detector design with Auger suppression and optical immersion. Recently, a new strategies used to achieve HOT detectors include barrier structures such as nBn, material improvement to lower generation-recombination leakage mechanisms, alternate materials such as superlattices and cascade infrared devices. Another method to reduce detector’s dark current is reducing volume of detector material via a concept of photon trapping detector.In this paper, a number of concepts to improve performance of photon detectors operating at near room temperature are presented. Mostly three types of detector materials are considered — HgCdTe and InAsSb ternary alloys, and type-II InAs/GaSb superlattice. Recently, advanced heterojunction photovoltaic detectors have been developed. Novel HOT detector designs, so called interband cascade infrared detectors, have emerged as competitors of HgCdTe photodetectors.

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High operating temperature interband cascade midwave infrared detector based on type-II InAs/GaSb strained layer superlattice

Cited by 102 publications

References 16 publications

Interband cascade infrared photodetectors with long and very-long cutoff wavelengths

Interband cascade infrared photodetectors with long and very-long cutoff wavelengths

Design and Development of Two-Dimensional Strained Layer Superlattice (SLS) Detector Arrays for IR Applications

HOT infrared photodetectors

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