Results 231 to 240 of about 504,859 (272)
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Journal of Modern Optics, 2001
Abstract Light-driven electron transitions between different traps in the direction opposite to an electric force eE (e is the electron charge and E is the static electric field) are studied. We show that in Ge-doped silica fibres the electrons are transfered predominantly between different Ge centres at concentrations ≥ 10 mol.% and dominate over the ...
V. B. Antonyuk, B.P. Antonyuk
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Abstract Light-driven electron transitions between different traps in the direction opposite to an electric force eE (e is the electron charge and E is the static electric field) are studied. We show that in Ge-doped silica fibres the electrons are transfered predominantly between different Ge centres at concentrations ≥ 10 mol.% and dominate over the ...
V. B. Antonyuk, B.P. Antonyuk
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Optics Communications, 1987
Abstract We report observation of an optical piston due to the effect of light induced drift in a rubidium-argon mixture. A tunable semiconductor diode laser is used for diagnostics of rubidium density and isotropic ratio. Sign and magnitude of the light induced drift effect depend directly on fine and hyperfine structure of rubidium.
W. A. Hamel +2 more
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Abstract We report observation of an optical piston due to the effect of light induced drift in a rubidium-argon mixture. A tunable semiconductor diode laser is used for diagnostics of rubidium density and isotropic ratio. Sign and magnitude of the light induced drift effect depend directly on fine and hyperfine structure of rubidium.
W. A. Hamel +2 more
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Physical Review Letters, 1999
Light-induced drift of optically active atoms in a buffer gas is a consequence of the unequal diffusive frictions suffered by the excited and the ground-state atoms. This drift can be used to create an "optical piston," which is best observed when the piston action is confined to a one-dimensional motion.
J. Singh +2 more
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Light-induced drift of optically active atoms in a buffer gas is a consequence of the unequal diffusive frictions suffered by the excited and the ground-state atoms. This drift can be used to create an "optical piston," which is best observed when the piston action is confined to a one-dimensional motion.
J. Singh +2 more
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Thermo-optical piston in gases
AIP Conference Proceedings, 2014The new steady state of the gas – thermo-optical pressure difference is considered. This condition occurs in the gas that is in a closed capillary in the field of resonant laser radiation and a temperature gradient. The pressure difference at the ends of the capillary is determined by the interaction of three fluxes – thermal creep, the light-induced ...
I. V. Chermyaninov, V. G. Chernyak
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Optical Piston Temperature in an internal combustion engine
SAE International Journal of Engines, 2011In the last ten year the mechanical power output of car engine increased significantly. This result has been possible especially through new injection systems that brought to an optimization of the combustion (direct injection, common rail) and to an improvement of the turbo charging.
SENATORE, ADOLFO +2 more
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High-fill-factor adaptive optics mirrors with independent piston, tip and tilt controls
, 2006 Dennis S. Greywall
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Phase separation and droplet nucleation induced by an optical piston
Physical Review E, 1994no ...
Delville, J. P. +3 more
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The optical piston in a capillary cell with open ends
Journal of Physics B: Atomic, Molecular and Optical Physics, 1988The authors present measurements of the time evolution of the spatial density distribution of Na atoms in an argon buffer gas, inside a capillary cell with open ends. The entrance of the capillary is irradiated with a laser beam that fills its cross section, so that light-induced drift occurs. For sufficiently high intensity, a steep front may build up,
H G C Werij, J. P. Woerdman, G Nienhuis
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Applied Optics, 2020
Piston diagnosing approaches based on neural networks have shown great success, while a few methods are heavily dependent on the imaging target of the optical system. In addition, they are inevitably faced with the interference of submirrors.
Mei Hui +5 more
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Piston diagnosing approaches based on neural networks have shown great success, while a few methods are heavily dependent on the imaging target of the optical system. In addition, they are inevitably faced with the interference of submirrors.
Mei Hui +5 more
semanticscholar +1 more source
Dynamics of the Optical Piston
1985Recently we have demonstrated a semipermeable optical piston [1] using the principle of light-induced drift (LID) [2]. In the present work,new experimental results on the dynamics of the optical piston are reported and compared with theory. The basic idea of LID and the optical piston is as follows.
Jos E. M. Haverkort +4 more
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