Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Gernot Fasching"'
Autor:
Robert Fabbro, Raffaele Coppeta, Michael Pusterhofer, Gernot Fasching, Thomas Haber, Werner Grogger
Publikováno v:
Micron. 158:103264
Understanding how defects are generated and propagate during operation in modern vertical cavity surface emitting lasers (VCSEL) is an important challenge in order to develop the next generation of highly reliable semiconductor lasers. Undesired oxid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1208357c5d510b04024b6bb91d5b947c
https://doi.org/10.1016/j.micron.2022.103264
https://doi.org/10.1016/j.micron.2022.103264
Publikováno v:
Semiconductor Science and Technology. 37:015010
In this work, accelerated stress tests have been performed on oxide confined vertical cavity surface emitting LASER arrays to study the formation of defects degrading the performance of the device. One such defect is an additional oxide volume formin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e84113b97a2493ef8c73cf59032b7a4e
https://doi.org/10.1088/1361-6641/ac3c99
https://doi.org/10.1088/1361-6641/ac3c99
Autor:
Werner Grogger, Gernot Fasching, Robert Fabbro, Thomas Haber, Michael Pusterhofer, Raffaele Coppeta
Publikováno v:
Measurement Science and Technology. 32:095406
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96495311adcc984693d124e86fa335f5
https://doi.org/10.1088/1361-6501/abf730
https://doi.org/10.1088/1361-6501/abf730
Autor:
Bernadette Egle, Elisabeth Schwarz, Matthias Domke, Marius Bodea, Sandra Stroj, Gernot Fasching
Publikováno v:
Applied Physics A. 123
Thin 50-µm silicon wafers are used to improve heat dissipation of chips with high power densities. However, mechanical dicing methods cause chipping at the edges of the separated dies that reduce the mechanical stability. Thermal load changes may th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31e710934b828ca4d534e87333be600e
https://doi.org/10.1007/s00339-017-1374-7
https://doi.org/10.1007/s00339-017-1374-7
Publikováno v:
physica status solidi c. 6:793-796
In this work, we present a scheme for room temperature detection of single subsurface InAs quantum dots buried in GaAs by Atomic Force Microscopy based local photocurrent spectroscopy. The measurements were performed at room temperature and ambient c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c9b7dadcc5ee07be374751eedd97bb6
https://doi.org/10.1002/pssc.200880611
https://doi.org/10.1002/pssc.200880611
Autor:
Alexander Benz, Karl Unterrainer, R. Zobl, V. Tamošiūnas, Aaron Maxwell Andrews, Gottfried Strasser, Pavel Klang, C. Deutsch, Gernot Fasching, Werner Schrenk
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 40:1840-1843
We present terahertz quantum-cascade lasers based on sub-wavelength circular-shaped double-metal microcavities whose single-mode emission can be fine-tuned via dynamical frequency pulling. This allows to estimate the peak gain of the material to 27 c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7e3625999f7472465c1a59de2f3c4c7
https://doi.org/10.1016/j.physe.2007.11.004
https://doi.org/10.1016/j.physe.2007.11.004
Autor:
Christoph Deutsch, P. Klang, Gottfried Strasser, Aaron Maxwell Andrews, Alexander Benz, W. Schrenk, Karl Unterrainer, Gernot Fasching
Publikováno v:
Materials Science and Engineering: B. 147:152-155
The effect of doping on terahertz quantum-cascade lasers (QCL) utilizing the longitudinal-optical (LO)-phonon depletion scheme of the lower laser state is investigated. Five identical 2.8 THz samples were grown with 2D equivalent doping ranging from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09ced94ddfffb2eacf2837bd389a1f47
https://doi.org/10.1016/j.mseb.2007.08.012
https://doi.org/10.1016/j.mseb.2007.08.012
Autor:
W. Schrenk, Michel Calligaro, J. Darmo, C. Deutsch, Gottfried Strasser, Alexander Benz, Xavier Marcadet, J. Kroll, Harvey E. Beere, David A. Ritchie, W. Parz, Aaron Maxwell Andrews, Karl Unterrainer, Thomas Müller, M. Martl, Damien P. Kelly, Gernot Fasching, Carlo Sirtori, S. S. Dhillon
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 14:307-314
In this review, we report on the study of terahertz (THz) intersubband (ISB) transitions and on the optical devices based on them. We use time-resolved THz spectroscopy to examine ISB optical transitions in semiconductor quantum wells and quantum cas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8671979cf37bbd3b7b495284569e0f7
https://doi.org/10.1109/jstqe.2008.915528
https://doi.org/10.1109/jstqe.2008.915528
Autor:
Tomas Roch, Aaron Maxwell Andrews, Gottfried Strasser, Alexander Benz, W. Schrenk, R. Zobl, Gernot Fasching, Karl Unterrainer, Vincas Tamosiunas
Publikováno v:
IEEE Journal of Quantum Electronics. 43:687-697
We report on the emission characteristics of microcavity quantum-cascade lasers emitting in the terahertz frequency range based on circular-shaped microresonators. Strong mode confinement in the growth and in-plane directions are provided by a double
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe8948472dd6f9516721832c9990e307
https://doi.org/10.1109/jqe.2007.900254
https://doi.org/10.1109/jqe.2007.900254
Autor:
Aaron Maxwell Andrews, Gernot Fasching, Karl Unterrainer, Alexander Benz, Tomas Roch, Gottfried Strasser, Werner Schrenk
Publikováno v:
Open Physics, Vol 5, Iss 2, Pp 244-251 (2007)
High-quality GaAs-based quantum cascade laser (QCL) structures for the terahertz (THz) emission have been grown by solid source molecular-beam epitaxy. Ex-situ high-resolution x-ray diffraction shows that layer thickness and its control is the most c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70d4accd904ddb41a42896b00a761da6
https://doi.org/10.2478/s11534-007-0004-y
https://doi.org/10.2478/s11534-007-0004-y