Zobrazeno 1 - 10
of 39
pro vyhledávání: '"F. Towner"'
Autor:
C. Burgner, Christoph Deutsch, David Follman, S. Segal, G. D. Cole, V. Jayaraman, K. Lascola, A. Cazabat, F. Towner, P. Heu
Publikováno v:
Vertical-Cavity Surface-Emitting Lasers XXII.
Tunable vertical cavity surface emitting lasers (VCSELs) offer a potentially low cost tunable optical source in the 3-5 μm range that will enable commercial spectroscopic sensing of numerous environmentally and industrially important gases including
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1faa6a12a22c1a24393b240283a0198
https://doi.org/10.1117/12.2287913
https://doi.org/10.1117/12.2287913
Publikováno v:
IEEE Photonics Technology Letters. 5:689-692
A GaAs/AlGaAs-superlattice rib-waveguide optical modulator that was fabricated with a single mask and a self-aligned electrode is described. The modulators uses the Stark-ladder transitions in the 775-810-nm wavelength range. for which the GaAs subst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b582485f5568dc57ff9244f54983a59
https://doi.org/10.1109/68.219712
https://doi.org/10.1109/68.219712
Autor:
F. Towner, Kale J. Franz, Scott S. Howard, Claire F. Gmachl, Anthony J. Hoffman, S. Schartner
Publikováno v:
2008 Conference on Lasers and Electro-Optics.
We demonstrate a quantum cascade laser employing two different injector regions and matched 4.6 mum optical transitions for low-voltage-defect operation. The laser has a pulsed wall-plug efficiency of 19% at 80 K and operates pulsed at 300 K.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ff37d62cc614ed699ebe521e80dfc97
https://doi.org/10.1109/cleo.2008.4551635
https://doi.org/10.1109/cleo.2008.4551635
Autor:
Scott S. Howard, F. Towner, Anthony J. Hoffman, Claire F. Gmachl, Kale J. Franz, S. Schartner
Publikováno v:
LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting Conference Proceedings.
We demonstrate a quantum cascade laser that uses two alternating injectors with matching 4.6 mum active regions that operates in pulsed mode up to room temperature with a peak wall-plug efficiency of ~10 %.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab6de8d772019bafe4ad7fe98b3eae87
https://doi.org/10.1109/leos.2007.4382629
https://doi.org/10.1109/leos.2007.4382629
Publikováno v:
(CLEO). Conference on Lasers and Electro-Optics, 2005..
The interband cascade (IC) IR LED light with 0.65% efficiency is reported. We believe this is the highest efficiency from IC LED structure reported so far. We discussed various device structures for enhanced light intensity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c6ac5e1b5eab6a900d5cd5e3a8f2263
https://doi.org/10.1109/cleo.2005.201774
https://doi.org/10.1109/cleo.2005.201774
Autor:
Kale J. Franz, Anthony J. Hoffman, Scott S. Howard, F. Towner, S. Schartner, Claire F. Gmachl
Publikováno v:
Optics Express. 15:15818
We demonstrate an In(0.635)Al(0.356)As/In(0.678)Ga(0.322)As strain compensated quantum cascade laser that employs heterogeneous injector regions for low voltage defect operation. The active core consists of interdigitated undoped and doped injectors
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28732571c1a511115d90d6a75411e7c0
https://doi.org/10.1364/oe.15.015818
https://doi.org/10.1364/oe.15.015818
Autor:
William H. Oldendorf, Howard F. Towner
Publikováno v:
Journal of Neuropathology & Experimental Neurology. 33:616-631
Spinal cord and brain distribution spaces of 3H-mannitol (MW 182) and 14C-dextran (MW 60,000-90,000) were measured in rats during the development of EAE. These distribution spaces were used as indicators of the permeability of brain vasculature. This
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d20fb86b7af00ab34ca962bad4e5ceab
https://doi.org/10.1097/00005072-197410000-00004
https://doi.org/10.1097/00005072-197410000-00004
Akademický článek
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Autor:
Howard F. Towner
Publikováno v:
Annals of the Missouri Botanical Garden. 64:48
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::102667462e2194d7317c67fe6e04725e
https://doi.org/10.2307/2395236
https://doi.org/10.2307/2395236
Conference
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