Zobrazeno 61 - 70
of 109
pro vyhledávání: '"77"'
Publikováno v:
SPIE Proceedings.
We describe an adaptive optics system for the 1.5m diameter solar telescope GREGOR which is currently developed for the Teide Observatory on Tenerife. In a first development step, the AO will provide compensation of 77 modes of wavefront deformation,
Autor:
Donald W. McCarthy, Roland J. Sarlot
Publikováno v:
Current Developments in Lens Design and Optical Engineering II.
A cryogenic mechanism has been built to correct for the blurring effects of atmospheric dispersion in adaptive-opticsimages from large aperture telescopes. Steward Observatory's 6.5m telescope features a deformable Cassegrainsecondary mirror compensa
Publikováno v:
Materials for Infrared Detectors.
This paper reports results obtained on mid-wave IR x equals 0.3 Hg1-xCdxTe avalanche photodiodes (APDs) that utilize a cylindrical 'p-around-n' front side illuminated n+/n-/p geometry. This 'p-around-n' geometry favors electron avalanche gain. These
Publikováno v:
SPIE Proceedings.
Neglecting the effect of generation-recombination (G-R) current, tunneling current, and surface leakage current, a loophole p-n junction current and R 0 A expression is developed in this paper. The R 0 A characteristic varying with temperature and lo
Autor:
Wen-Gang Wu, Zhibin Chen
Publikováno v:
SPIE Proceedings.
Photoelectronic characteristics of the fabricated In x Ga 1-x As/Al y Ga 1- y As/Al z Ga 1-z As asymmetric step quantum-well middle wavelength (3 to approximately 5 micrometers ) infrared detectors are studied. The components display photovoltaic-typ
Autor:
Eric Costard, Philippe Bois, Xavier Marcadet, Eric Herniou, Philippe Tribolet, Michel Vuillermet
Publikováno v:
SPIE Proceedings.
Standard GaAs/AlGaAs QWIPs are now well established for LWIR detection. The main advantage of this technology is the duality with the technology of commercial GaAs devices. The second advantage widely claimed for QWIPs is the so-called band-gap engin
Autor:
YionNi Liu, Horng Chang, Far-Wen Jih, Ya-Tung Cherng, ShuePing Yang, YauTang Gau, Li-Kuo Dai, Kaung-Shin Huang, Cheng-Der Chiang, Ping-Kuo Weng
Publikováno v:
Optoelectronic Materials and Devices II.
A 256x256 backside illuminated photovoltaic indium antimonide (InSb) focal plane arrays having spectral response in the medium wavelength infrared (3 to 5 (mu) m) was designed and developed at Chung Shang Institute of Science and Technology for use i
Autor:
Leonid Ya. Karachinsky, Petr S. Kop'ev, Nikita A. Pikhtin, I. I. Novikov, V. I. Kopchatov, I. S. Tarasov, Sergey V. Zaitsev, Nikita Yu. Gordeev
Publikováno v:
SPIE Proceedings.
The concept of resonant carrier many body interaction during radiative recombination was applied to explain spectra of quantum well electroluminescence at 77 K. Extremely good agreement of the calculated and experimental spectra in the entire range o
Publikováno v:
SPIE Proceedings.
The aim of this paper is to investigate the intrafield flare distribution and its link with the intrafield CD variation for various ASML lithographic tools. Flare is measured as the required dose to clear a 100micrometers -large positive resist patte
Publikováno v:
Ultrafast Phenomena in Semiconductors III.
The time-integrated and time-resolved photoluminescence (PL) of Cd0.3Zn0.7S0.06Se0.94/ZnS0.06Se0.94 single quantum wells (QW) have been studied at various temperatures. The time-resolved PL is obtained by sum frequency conversion technique with 300 f