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Wednesday, May 13, 2020 | History

1 edition of Tunable Bandwidth Quantum Well Infrared Photo Detector (TB-QWIP) found in the catalog.

Tunable Bandwidth Quantum Well Infrared Photo Detector (TB-QWIP)

Tunable Bandwidth Quantum Well Infrared Photo Detector (TB-QWIP)

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  • 17 Currently reading

Published by Storming Media .
Written in English

    Subjects:
  • TEC036000

  • The Physical Object
    FormatSpiral-bound
    ID Numbers
    Open LibraryOL11845879M
    ISBN 101423513916
    ISBN 109781423513919

      A voltage-tunable, dual-band, InAs quantum-dot infrared photodetector (QDIP) is reported. The QDIP consists of InAs quantum dot layers with GaAs and In Ga As capping layers for extended middle infrared (EMIR, 6–8 µm) and long-wave infrared (LWIR, 8–12 µm) detection, respectively. Voltage-tunable single- and dual-band operations were obtained with good Cited by: In this paper, we report a mid-wave infrared (MWIR) and long-wave infrared (LWIR) dual-band photodetector capable of voltage-controllable detection band selection. The voltage-tunable dual-band photodetector is based on the multiple stacks of sub-monolayer (SML) quantum dots (QDs) and self-assembled QDs. By changing the photodetector bias voltages, one can set the detection band to be Author: Yao Zhai, Guiru Gu, Xuejun Lu.

    Terahertz quantum-well photodetector Appl. Phys. Lett. 84 –70 [10] Su X H, Yang J, Bhattacharya P, Ariyawansa G and PereraAGU Terahertz detection with tunneling quantum dot intersublevel photodetector Appl. Phys. Lett. 89 [11] Campbell J C and Madhukar A Quantum dot infrared photodetector Proc. IEEE 95 – Extending and controlling the spectral range of light detectors is very appealing for several sensing and imaging applications. Here we report on a normal incidence dual band photodetector operating in the visible and near infrared with a bias tunable spectral response. The device architecture is a germanium on silicon epitaxial structure made of two back-to-back connected photodiodes. The Cited by: 3.

      Understanding climate changes and the parameters influencing the climate is very important. Infrared imaging is an important technology for gathering useful information however, prior to , no photodetector arrays had been fabricated that would operate at infrared wavelengths necessary for detecting these changes in ecosystems. In a unique collaboration between the Goddard Space . @article{osti_, title = {Mid-infrared photodetection in an AlGaAs/GaAs quantum-well infrared photodetector using photoinduced noise}, author = {Fernandes, F. M. and Optovac Mecânica e Optoeletrônica LTDA, São José dos Campos, SP and Silva, E. C. F. da and Quivy, A. A.}, abstractNote = {We propose a new way to assess the output signal of a quantum-well infrared.


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Tunable Bandwidth Quantum Well Infrared Photo Detector (TB-QWIP) Download PDF EPUB FB2

The abstract provided by the Pentagon follows: In this thesis a tunable bandwidth quantum well photo- detector (TB- QWIP) is fabricated and experimentally characterized.

The designed detector is based on the Stark effect with two quantum step wells arranged opposite to each other to simultaneously achieve both blue- and red-shift of the absorption peak for either direction of the : Mihail Giannopoulos. Addressed to both students as a learning text and scientists/engineers as a reference, this book discusses the physics and applications of quantum-well infrared photodetectors (QWIPs).

It is assumed that the reader has a basic background in quantum mechanics, solid Cited by: A tunable infrared modulator and/or switch using intersubband Stark shift in a step quantum well is discussed.

The device utilizes the intersubband absorption and the large change of separation between energy levels in the step quantum well under an applied electric field.

The bandwidth of the detector tuned with bias from µm at -1 V to µm at -4 V, which amounts to 50% higher than the original width. Further tuning of TB-QWIP parameters based on the analysis of this thesis hold promise for % increase of peak width by an applied bias. SUBJECT TERMS Tunable Bandwidth Quantum Well Infrared Photo.

A three-color voltage tunable quantum well long wavelength infrared photodetector based on GaAs — AlGaAs is realized. A detailed study of the detector characteristics is carried out, including dark current, responsivity, and detectivity.

An equivalent circuit model is used in understanding the observed by: 1. Recently, there is an emerging infrared technology based on quantum well intersubband transition in III-V compound semiconductors. With the new technology, these impedances can be eliminated and a new era of infrared imaging is in sight.

Spectrum tunable quantum dot-in-a-well infrared detector arrays for thermal imaging Jonathan R. Andrews1, Sergio R. Restaino1, Scott W.

Teare2, Sanjay Krishna3, Christopher C. Wilcox1, Ty Martinez1, Luke Lester3 [email protected] Abstract: The Center for High Technology Materials at the University of New Mexico has been.

Approved for public release; distribution is this thesis a tunable bandwidth quantum well photo-detector (TB-QWIP) is fabricated and experimentally characterized. The designed detector is based on the Stark effect with two quantum step wells arranged opposite to each other to simultaneously achieve both blue- and red-shift of the absorption peak for either direction of the : Mihail Giannopoulos.

Abstract: We report a large-format ( times ) voltage-tunable quantum-well infrared photodetector (QWIP) focal plane array (FPA) for dual-color imaging in the midwavelength infrared ( mum) band. Voltage-tunable spectral response has been achieved through series connection of two eight-well stacks of AlGaAs-InGaAs epilayers grown by molecular beam epitaxy on GaAs by: This paper presents the design and characterization of a near infrared (NIR) tunable quantum well infrared photodetector (QWIP).

Operation of a tunable quantum well, highly wavelength-selective infrared photodetector is discussed, and design guidelines for the structure and field parameters to obtain high efficiency and selectivity are given.

A numerical example for the CO 2 laser photodetector is also by: 1. Abstract: We investigate the theoretical calculations of the voltage tunable dual-band quantum-well infrared photodetector (QWIP) in the long and very long wavelength infrared range (LWIR and VLWIR).

The detector consists of two serially connected GaAs/AlGaAs stacks which have spectral responses of and μm wavelengths, by: 2. The idea of utilizing a quantum well for infrared detection was first presented by Esaki and Sakaka in and can be explained by using the basic principles of quantum mechanics.

1 The quantum well is equivalent to the well-known particle in a box problem in quantum mechanics, which can be solved by the time independent Schrödinger equation. The solutions to this problem are the eigenvalues that describe energy levels inside the quantum well.

Magnetic eld tunable terahertz quantum well infrared photodetector Ivana Savi´c1, Vitomir Milanovi´c2,1, Nenad Vukmirovi´c1, Vladimir D. Jovanovi´c1, Zoran Ikoni´c1, Dragan Indjin1, Paul Harrison1 1School of Electronic and Electrical Engineering, University. back-of-the-envelope calculations in Infrared Photodetector s designs.

QWIPs Responsivity. QWIPs are sensors that perform the detection in the IR range by the photons absorption in quantum-wells of semi-conductor material[5]. As photoconductive detectors, its operation is.

We report a large-format ( times ) voltage- tunable quantum-well (QW) infrared photodetector focal plane array (FPA) for dual-band imaging in the mid- and long-wavelength infrared (MWIR and LWIR) bands.

Voltage-tunable spectral response has been achieved through a series connection of eight-well MWIR AlGaAs-InGaAs and well LWIR AlGaAs-GaAs QW stacks grown by molecular. A theoretical model and a design of a magnetic-field tunable CdMnTe∕CdMgTe terahertz quantum well infrared photodetector are presented.

The energy levels and the corresponding wave functions were computed from the envelope function Schrödinger equation using the effective-mass approximation and accounting for Landau quantization and the giant Zeeman effect induced by Cited by: The quantum well infrared detectors made of square quantum wells found to have an order of magnitude lower Stark shift originated from second order effects.

This suggests that the step well infrared detector can have applications in tunable wavelength infrared detectors. This enables a very long-wavelength infrared response.

In our experiments, we observe a response up to 55 µm, which is tunable by varying the degree of hot-hole injection, for a GaAs/AlGaAs sample with δ = eV (equivalent to µm in wavelength).Cited by:   A novel design of quantum ring intersubband photodetectors is proposed based on quantum rings-in-well structure and its performance characteristics studied by simulation.

The photon absorption occurs for intersubband transitions between quantum ring sub-bands and well states. The detector is expected to be better controlled over operating wavelength and normal incidence Author: R.

Samadzadeh, Mahdi Zavvari, R. Hosseini. Abstract. We report voltage-tunable μm & μm dual-band detection in the InAs/Al Ga As/In Ga As confinement-enhanced dots-in-a-well quantum dot infrared photodetectors. The capability in temperature sensing is also demonstrated.Tunable Bandwidth Quantum Well Infrared Photo Detector (TB-QWIP) - Kindle edition by Mihail Giannopoulos.

Download it once and read it on your Kindle device, PC Download it once and read it on your Kindle device, PC.Two-color quantum well infrared photodetector focal plane arrays Jason Bundasa, Kelly Patnaudea, Richard Dennisa, Douglas Burrowsa, Robert Cooka, Axel Reisingera, Mani Sundarama, Robert Bensonb, James Woolawayc, John Schlesselmannc, Susan Petronioc aQmagiQ LLC, One Tara Blvd., SuiteNashua, NH, USA bFLIR Systems, Inc.

- Boston, 25 Esquire Road, North Billerica, MA.