Results 281 to 290 of about 275,683 (312)

Second-harmonic generation of polarization singularities

Optics Letters, 2002
Second-harmonic generation was studied theoretically for the vector singularities (daisy modes) of linearly polarized light and for the elliptic singularities (C points) of elliptically polarized light. Topological charge doubling for C points and daisy modes, similar to that found for vortices, was found.
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Second Harmonic Generation in Powder Laser

CLEO/Europe Conference on Lasers and Electro-Optics, 1998
A laser-like emission from powders of solid state luminophosphors was reported in a number of publications, see for example Refs. [1,2]. A dramatic narrowing of Nd emission line (4F3/2-4I11/2) in powders of Nd doped laser materials is observed when the pumping energy exceeds some critical threshold value.
M. A. Noginov, S. U. Egarievwe, N. Noginova, J. C. Wang, H. J. Caulfield   +4 more
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Second Harmonic Generation in Optical Fibers

Optical Society of America Annual Meeting, 1990
Intensive investigation has followed the surprising observation of self-organized second-harmonic generation (SHG) in optical fibers. It is now known that an alternating χ(2) grating has formed in the fiber. The grating grows by mixing of the fundamental and harmonic waves so SHG gratings can be formed quickly by seeding with a coherent second-harmonic
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Optimization of second-harmonic generation microscopy

Micron, 2001
We describe the principles and characteristics of second-harmonic generation imaging (SHGI) and explore various methods for optimization of the technique. Second-harmonic imaging is optimized for ultrashort laser pulses, high numerical aperture microscope objectives, a highly sensitive non-descanned large area detector, pseudo-phase-matching, and ...
R, Gauderon, P B, Lukins, C J, Sheppard
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Second Harmonic Generation in Inclusion Complexes

Journal of Inclusion Phenomena, 1984
Second harmonic generation in inclusion complexes between dimethyl β-cyclodextrin and nitroaniline derivatives having a non-centrosymmetric crystal structure occurs.
Satoru Tomaru, Sakae Zembutsu, Masao Kawachi, Morio Kobayashi   +3 more
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Near-field second-harmonic generation

Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2004
Near-field microscopy of second-harmonic generation combines high surface sensitivity of the nonlinear optical process and high spatial resolution of the near-field optics. It enables investigation of nonlinear optical phenomena at the nanoscale and provides an opportunity to develop a highly sensitive optical technique for materials characterization ...
Anatoly V, Zayats, Igor I, Smolyaninov
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Second-Harmonic Generation

1991
In optical second-harmonic generation coherent optical radiation of frequency 2ω is generated, through the use of a medium with the appropriate nonlinear susceptibility, from incident coherent optical radiation of frequency ω. For the process to take place efficiently, the phase matching condition (colinear geometry) $$ k(2\omega ) = 2k(\omega ) $$
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Oscillations and quantized second-harmonic generation

Physical Review A, 1988
We investigate quantum-mechanical second-harmonic generation for parameters such that classical electrodynamics predicts oscillations. Specifically we calculate the Q distribution function in a Gaussian approximation about the classical limit cycle. In the classical limit initial rapid collapse of the Q distribution into the neighborhood of the limit ...
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Milliwatt terahertz harmonic generation from topological insulator metamaterials

Light: Science and Applications, 2022
Klaas-Jan Tielrooij, David Saleta Reig, Alexander Block   +2 more
exaly  

Second-Harmonic Generation

2022
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