Journal ArticleDOI
Detection wavelength of InGaAs/AlGaAs quantum wells and superlattices
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TLDR
In this paper, a transfer-matrix method was adopted to calculate both the energy levels and the wave functions of InGaAs/AlGaAs quantum well structures for infrared detection.Abstract:
InGaAs/AlGaAs quantum well structures have been shown to be versatile for infrared detection. By changing the material composition, one can tune the detection wavelength from 2 to 35 μm and beyond. However, there have been few systematic calculations on the absorption wavelength of these structures with respect to their structural parameters. In this work we have adopted the transfer-matrix method to calculate both their energy levels and the wave functions. From this calculation, the absorption and the responsivity spectra of the structures can be predicted. The theory agrees with the experimental result of the test structures. Supported by the experimental evidence, we applied the calculation to a general class of midwavelength detectors and thus established a useful guideline for the detector design in this wavelength range.read more
Citations
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Journal ArticleDOI
The use of synchrotron radiation techniques in the characterization of strained semiconductor heterostructures and thin films
TL;DR: In this paper, the effect of strain on the band lineups alignments in strained heterostructures is discussed deeply, and the attention is focused on the most important results obtained by several groups in the characterization of semiconductor heterometructures using the following structural SR techniques.
Journal ArticleDOI
Nanostructured Materials and Architectures for Advanced Infrared Photodetection
TL;DR: In this paper, a review on the photodetection in the infrared spectrum and recent progresses in constructing advanced infrared photodetsectors based on quantum wells, dots, and the rapidly evolving 1D and 2D materials are summarized.
Book ChapterDOI
Quantum-Well Infrared Photodetectors and Arrays
TL;DR: In this paper, the application of quantum-well infrared photodetector (QWIP) technology in infrared imaging is described, and the fundamental topics of infrared detection are first reviewed with the goal of prioritizing the QWIP parameters.
Journal ArticleDOI
640 /spl times/ 512 pixel long-wavelength infrared narrowband, multiband, and broadband QWIP focal plane arrays
TL;DR: In this article, the electrical and optical characterization of these FPAs, and their performance were discussed, and a very sensitive (NEDT /spl sim/ 10.6 mK) 640 /spl times/ 512 pixel thermal imaging camera having a 9 /spl mu/m cutoff was demonstrated.
Journal Article
Detection wavelength of quantum-well infrared photodetectors
TL;DR: In this article, the authors performed a systematic calculation on the detection wavelength, the absorption linewidth, and the oscillator strength of a typical GaAs/Al x Ga 1 - x As multiple-quantum-well photodetector, with aluminum molar ratio in the barriers ranging from 0.14 to 0.42 and the quantum-well width ranging from 20 to 70 A.
References
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Journal ArticleDOI
New 10 μm infrared detector using intersubband absorption in resonant tunneling GaAlAs superlattices
TL;DR: In this article, a 10.8 μm superlattice infrared detector based on doped quantum wells of GaAs/AlGaAs was proposed, which achieved a narrow bandwidth (10%) photosensitivity with a responsivity of 0.52 A/W and an estimated speed of 30 ps.
Journal ArticleDOI
Band nonparabolicity effects in semiconductor quantum wells.
TL;DR: In this article, an empirical two-band model for heterostructures is proposed, which provides a consistent energy-dependent effective mass characterization of nonparabolicity in quantum wells.
Book
The Physics of Quantum Well Infrared Photodetectors
TL;DR: In this paper, the energy levels in one-dimensional quantum wells in the presence of interaction were analyzed using Wentzel-Kramers-Brillouin approximation Kronig-Penney model transfer-matrix method.
Journal ArticleDOI
Two-color corrugated quantum-well infrared photodetector for remote temperature sensing
TL;DR: In this article, a corrugated light-coupling scheme for remote temperature sensing has been proposed for infrared photodetector (QWIP) based on two stacks of multiple quantum wells (MQWs), each sensitive in one of the atmospheric infrared transmission windows and each with a separate readout circuit.