16.5
                μ
                m
           quantum cascade detector using miniband transport

Giorgetta, Fabrizio R.; Baumann, Esther; Graf, Marcel; Ajili, Lassaad; Hoyler, Nicolas; Giovannini, Marcella; Faist, Jérôme; Hofstetter, Daniel; Krötz, Peter; Sonnabend, G.

doi:10.1063/1.2743955

Cited by 45 publications

(18 citation statements)

References 14 publications

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“…Fig. 9 shows the calculated conduction band diagram of sample N973 designed for a detection energy (corresponding to the transition) of 71.3 meV (17.4 m) [19]; its active region is described in Table I as well. Given the low detection energy and the In Ga As LO phonon energy of 32 meV, the phonon stair QCD extractor would have only two steps.…”

Section: A Mid-infrared Qcdmentioning

confidence: 99%

Quantum Cascade Detectors

Giorgetta

Baumann

Graf

et al. 2009

IEEE J. Quantum Electron.

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196

126

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Abstract-This paper gives an overview on the design, fabrication, and characterization of quantum cascade detectors. They are tailorable infrared photodetectors based on intersubband transitions in semiconductor quantum wells that do not require an external bias voltage due to their asymmetric conduction band profile. They thus profit from favorable noise behavior, reduced thermal load, and simpler readout circuits. This was demonstrated at wavelengths from the near infrared at 2 m to THz radiation at 87 m using different semiconductor material systems. In the NIR, fast intraband semiconductor photodetectors are only available for wavelengths up to about 1.6 m. On the other tail of optical frequencies, namely for detection of THz radiation, bolometers are widely used; however, they are not well suited for high-speed applications. For fast light detection at wavelengths above 1.6 m, ISB photodetectors are very promising candidates. As unipolar devices, their fundamental F. R. Giorgetta was with the University of Neuchatel, 2000 Neuchatel, Switzerland. He is now with the National

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Section: A Mid-infrared Qcdmentioning

confidence: 99%

Quantum Cascade Detectors

Giorgetta

Baumann

Graf

et al. 2009

IEEE J. Quantum Electron.

Self Cite

196

126

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“…2,[6][7][8] A typical mid-infrared QCD structure contains several identical periods, each one of them containing between 5 and 10 coupled quantum wells. A period is made of an 'active region' dedicated to the absorption of infrared photons and a 'cascade region' optimized for the electron transfer between two consecutive regions.…”

Section: Introductionmentioning

confidence: 99%

Photocurrent analysis of quantum cascade detectors by magnetotransport

Jasnot¹,

Péré‐Laperne²,

Vaulchier³

et al. 2010

Phys. Rev. B

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Photocurrent measurements have been performed on a quantum cascade detector structure under strong magnetic field B applied parallel to the growth axis. The photocurrent shows oscillations as a function of B. In order to describe this behavior, we have developed a rate equation model. The interpretation of the experimental data supports the idea that an elastic scattering contribution plays a central role in the behavior of these structures. We present a calculation of the electron lifetime versus magnetic field which suggests that impurities scattering in the active region is the limiting factor. These experiments lead to a better understanding of these complex structures and identify key parameters to optimize them further.

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“…The dark current levels can be further reduced by a photovoltaic operation, and a clever barrier design with the possibility of zero bias operation. This approach has been successfully used in quantum cascade detectors [88,89] which have achieved operation in the far-infrared/THz range [90].…”

Section: Dark Currentmentioning

confidence: 99%

Review of current progress in quantum dot infrared photodetectors

Barve

Lee

Noh

et al. 2009

Laser & Photonics Reviews

121

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Quantum dot infrared photodetectors (QDIPs) have made significant progress after their early demonstration about a decade ago. The progress made by QDIP technology over the last few years is reviewed and compared with quantum well infrared photodetectors (QWIPs). It is shown that the performance of QDIPs has significantly improved using novel architectures such as dots-in-a-well designs, and large-format (1 K 1 K) focal plane arrays have been realized. However, even though there are significant reports of performance parameters better than QWIPs from single-pixel devices, QDIP-based focal plane arrays are still a factor of 3-5 worse in terms of noise equivalent temperature difference. The reasons for the performance gap and the key scientific and technological challenges that need to be addressed to achieve the full potential of QD-based technology are discussed.Three-dimensional rendition of quantum dots in a well structure.

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16.5 μ m quantum cascade detector using miniband transport

Cited by 45 publications

References 14 publications

Quantum Cascade Detectors

Quantum Cascade Detectors

Photocurrent analysis of quantum cascade detectors by magnetotransport

Review of current progress in quantum dot infrared photodetectors

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