Results 331 to 340 of about 4,473,381 (352)

Optically active doped xerogel

Journal of Non-Crystalline Solids, 1992
Abstract Using the sol-gel process, organic dye molecules have been trapped and individually encaged in a solid xerogel matrix. These doping molecules were aligned by a focussed femtosecond laser pulse, thus creating a local birefringence. The molecule alignment is permanent. An optical memory matrix is thus experimentally achieved.
Canva, Michael, Georges, Patrick, Le Saux, Gilles, Brun, Alain, Chaput, Frédéric, Boilot, Jean-Pierre   +5 more
openaire   +3 more sources

Active optics for space applications: an ESA perspective

Astronomical Telescopes and Instrumentation, 2014
Active optics for Space is relatively new field that takes advantage of lessons learnt on ground, and together with the tighter constrains of space environment it allows operation of larger mirrors apertures for space telescopes and better image quality.
A. Zuccaro Marchi, P. Hallibert, J. Pereira do Carmo, E. Wille   +3 more
semanticscholar   +1 more source

Life on the edge: measuring linewidths

Applied Optics, 1988
How to measure the width of lines on a semiconductor photomask is a classic example of how NBS responds to industrial needs. The problem came to the attention of NBS researchers when a commercial standards maker sought measurements to check his linewidth standards against NBS standards.
openaire   +8 more sources

The racemization of an optically active sulfilimine and optically active aminosulfonium salts

Tetrahedron, 1974
Abstract The racemization of an optically active sulfilimine and optically active aminosulfonium salts was kinetically measured. The mechanism of the racemization of optically active sulfilimine (−)-1 has been established. The activation parameters for the racemization of (−)-1 and (−)-7 were calculated. A plausible pathway for the decomposition of (−
D. Darwish, S.K. Datta
openaire   +2 more sources

Optical activity in multihelicoidal optical fibers

Physical Review A, 2015
We have studied optical activity in optical fibers that possess multihelical distribution of the refractive index profile. We have demonstrated through an analytical treatment that the effect of optical activity is caused by asymmetric spin-dependent influence of the spin-orbit interaction on the coupling between the fundamental mode and the higher ...
Constantin N. Alexeyev, B. P. Lapin, Maxim A. Yavorsky, Giovanni Milione   +3 more
openaire   +2 more sources

Resonance optical activity in multihelicoidal optical fibers

Optics Letters, 2016
We have studied the effect of optical activity (OA) in optical fibers with multihelical distribution of refractive index profiles near the resonance wavelength, at which the conversion of an incident Gaussian beam into an optical vortex (and vice versa) takes place.
Maxim A. Yavorsky, B. P. Lapin, Constantin N. Alexeyev   +2 more
openaire   +3 more sources

Optical Activity

1989
Both in low and high molecular weight compounds optical activity can be observed only in chiral molecules. Analysis of the chirality of a molecule or macromolecule can be made by looking at its symmetry properties. Very simply, a molecule is chiral if all its allowed conformations lack reflection symmetry elements.
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Laser and optics activities at CREOL

Journal of Laser Applications, 1994
CREOL is an interdisciplinary institute with a mission to foster and support research and education in the optical and laser sciences and engineering. CREOL’s principal members are its 21 faculty. The faculty are encouraged and supported in developing, maintaining, and expanding innovative and sponsored research programs, especially ones which are ...
openaire   +3 more sources

Organogelators with Nonlinear Optical activity

2016
International ...
Marco, Ana-Belén, Aparicio, Fatima, Faour, Lara, Iliopoulos, Konstantinos, Sahraoui, Bouchta, Gindre, Denis, Franco, Santiago, Andreu, Raquel, Canevet, David, Sallé, Marc   +9 more
openaire   +5 more sources

Optical activity of hematin a

Biochemical and Biophysical Research Communications, 1967
Fook Choy Yong, Tsoo E. King
openaire   +3 more sources