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pro vyhledávání: '"J. Y. Andersson"'
Autor:
J. Y. Andersson
Publikováno v:
Journal of Applied Physics. 78:6298-6304
The most important mechanism of dark current in n‐doped quantum‐well infrared photodetectors (QWIPs) is due to interaction of electrons with longitudinal optical phonons. Theoretical expressions are derived for the carrier lifetime, and for gener
Autor:
Gabby Sarusi, K. M. S. V. Bandara, Ronald E. Leibenguth, Barry F. Levine, J. Y. Andersson, Stephen J. Pearton
Publikováno v:
Journal of Applied Physics. 76:4989-4994
We have performed a detailed study of two‐dimensional grating coupling for quantum well infrared photodetectors in the very long wavelength spectral region λ∼16–17 μm. Using calculations based on the modal expansion method we quantitatively e
Publikováno v:
Physica Scripta. :165-168
The absorption efficiency of thermal infrared detectors of various designs is theoretically evaluated and compared, with an emphasis on detectors possible to fabricate by surface micromachining. In particular, the requirement of low thermal mass is c
Publikováno v:
Physica Scripta. :131-135
The performance of GaAs/AlGaAs multiple quantum well infrared detectors is studied theoretically and experimentally, with special emphasis on 8-12 μm thermal imaging applications. The dependence of detector performance on various factors like light
Autor:
J. Y. Andersson, L. Lundqvist
Publikováno v:
Journal of Applied Physics. 71:3600-3610
A theory of the grating‐coupled quantum‐well infrared detector, based on the modal expansion method (MEM) is presented together with numerical simulation results. MEM is a near‐exact way of determining the electromagnetic‐field pattern in a r
Publikováno v:
Scopus-Elsevier
Infrared detectors based on AlGaAs/GaAs multi quantum wells operating close to background limitation have been fabricated by MOVPE. Since detector performance depends critically on quantum well parameters, a sensitive and preferably non-destructive c
Autor:
L. Lundqvist, J. Y. Andersson
Publikováno v:
Applied Physics Letters. 59:857-859
Quantum well infrared detectors based on a waveguide with a doubly periodic grating coupler are shown to provide quantum efficiencies of nearly unity with respect to unpolarized polarization. This is a factor of six larger than for a conventional 45
Publikováno v:
Applied Physics Letters. 58:2264-2266
Long wavelength quantum well detectors with very high quantum efficiency, based on the coupling of radiation into an optical resonant cavity or waveguide defined by a reflection grating coupler on one side of the infrared absorbing multiquantum well
Publikováno v:
Conference on Lasers and Electro-Optics Europe.
Long wavelength (8-10 µm) quantum well infrared photodetectors (QWIPs) based on intersubband transitions in n-doped AlGaAs/GaAs quantum wells (QW) are known to exhibit high detectivities D * = I 1010 -9-1010 cm Hz1/2 W1. Due to the well established
Publikováno v:
Quantum Well Intersubband Transition Physics and Devices ISBN: 9789401045018
Long wavelength (7.5–10 μm) quantum well infrared photodetectors (QWIPs) based on AIGaAs/GaAs quantum wells (QWs) have been shown to exhibit high peak detectivities D* =1.1010–9.1010 cm Hz1/2 W-1 at 80 K and close to background limited operation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb8259d3df91dc2f41c835f50438c22f
https://doi.org/10.1007/978-94-011-1144-7_2
https://doi.org/10.1007/978-94-011-1144-7_2