Broadband QWIP FPAs for hyperspectral applications

Reisinger, A. R.; Dennis, R.B.; Patnaude, Kelly; Burrows, Douglas; Bundas, Jason; Beech, Kim; Faska, Ross; Sundaram, M.

doi:10.1016/j.infrared.2012.12.024

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…As a boundto-bound intersubband transition detector, the linewidths of QCDs are intrinsically narrow. Hence, common QCDs are not able to be applied in spectral broad detection, such as infrared spectroscopy, hyperspectral and space applications etc [21]. While, QCDs perform high material uniformity, low cost and high yield than detectors such as HgCdTe [22].…”

Section: Introductionmentioning

confidence: 99%

Long wavelength infrared quantum cascade detector with a broadband response

Li¹,

Zhou²,

Zhou³

et al. 2018

J. Phys. D: Appl. Phys.

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A novel structure to achieve long wavelength infrared broadband detection ranging from 7.6–10.4 µm is proposed via quantum cascade detector. With a pair of identical coupled quantum wells separated by a thin barrier, acting as absorption regions, the relative linewidth (ΔE/E) of response can be dramatically broadened to 30.7%. Moreover, this structure introduces about 30% enhancement in blackbody responsivity. It is shown that the spectral shape can be tuned by the bias voltage effectively, while it is insensitive to the working temperature. The device can work at liquid nitrogen temperature with Johnson noise limited blackbody detectivity of 5.4 × 108 Jones.

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Section: Introductionmentioning

confidence: 99%

Long wavelength infrared quantum cascade detector with a broadband response

Li¹,

Zhou²,

Zhou³

et al. 2018

J. Phys. D: Appl. Phys.

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show abstract

“…As far as we know, only QWIPs with a Brewster angle geometry ( 25 ) or an edge facet waveguide structure ( 26 ) show such a non–wavelength-selective character at a price of low responsivity. Therefore, the responsivity-enhanced 3D tubular QWIPs could be advantageous in multicolor ( 27 ) and broadband infrared detections ( 28 ).…”

Section: Resultsmentioning

confidence: 99%

Self-rolling and light-trapping in flexible quantum well–embedded nanomembranes for wide-angle infrared photodetectors

Wang

Zhen

et al. 2016

Sci. Adv.

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“…Hence, common QCDs cannot be applied in broad spectral detection, such as infrared spectroscopy, hyperspectral and space applications, etc. [20] To improve the spectral breadth of QCDs, a few different approaches have been proposed. For example, using a stack of active heterostructures where each stack covers a particular wavelength.…”

Section: Introductionmentioning

confidence: 99%

Progress in quantum well and quantum cascade infrared photodetectors in SITP

Zhou¹,

Li²,

Lü³

2019

Chinese Phys. B

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This paper presents a review of recent advances in quantum well and quantum cascade infrared photodetectors developed in Shanghai Institute of Technical Physics, Chinese Academy of Sciences (SITP/CAS). Firstly, the temperature-and bias-dependent photocurrent spectra of very long wavelength (VLW) GaAs/AlGaAs quantum well infrared photodetectors (QWIPs) are studied using spectroscopic measurements and corresponding theoretical calculations in detail. We confirm that the first excited state, which belongs to the quasi-bound state, can be converted into a quasi-continuum state induced by bias and temperature. Aided by band structure calculations, we propose a model of the double excited states that determine the working mechanism in VLW QWIPs. Secondly, we present an overview of a VLW QWIP focal plane array (FPA) with 320×256 pixels based on the bound to quasi-bound (BTQB) design. The technology of the manufacturing FPA based on the QWIP structures has been demonstrated. At the operating temperature of 45 K, the detectivity of QWIP FPA is larger than 1.4×10 10 cm•Hz 1/2 /W with a cutoff wavelength larger than 16 µm. Finally, to meet the needs of space applications, we proposed a new long wavelength quantum cascade detector with a broadband detection ranging from 7.6 µm to 10.4 µm. With a pair of identical coupled quantum wells separated by a thin barrier, acting as absorption regions, the relative linewidth (∆E/E) of response can be dramatically broadened to 30.7%. It is shown that the spectral shape and linewidth can be tuned by the thickness of the thin barrier, while it is insensitive to the working temperature. The device can work above liquid nitrogen temperature with a peak responsivity of 63 mA/W and Johnson noise limited detectivity of 5.1×10 9 cm•Hz 1/2 /W.

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Broadband QWIP FPAs for hyperspectral applications

Cited by 10 publications

References 12 publications

Long wavelength infrared quantum cascade detector with a broadband response

Long wavelength infrared quantum cascade detector with a broadband response

Self-rolling and light-trapping in flexible quantum well–embedded nanomembranes for wide-angle infrared photodetectors

Progress in quantum well and quantum cascade infrared photodetectors in SITP

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