optical second-harmonic generation

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• Second harmonic generation — (SHG; also called frequency doubling) is a nonlinear optical process, in which photons interacting with a nonlinear material are effectively combined to form new photons with twice the energy, and therefore twice the frequency and half the… …   Wikipedia

• Surface second harmonic generation — is a method for probing interfaces in atomic and molecular systems. In second harmonic generation (SHG), the light frequency is doubled, essentially converting two photons of the original beam of energy E into a single photon of energy 2 E as it… …   Wikipedia

• Second harmonic imaging microscopy — (SHIM) is based on a nonlinear optical effect known as second harmonic generation (SHG). SHIM has been established as a viable microscope imaging contrast mechanism for visualization of cell and tissue structure and function. A second harmonic… …   Wikipedia

• Harmonic generation — Perturbative Harmonic Generation Perturbative Harmonic Generation is a process where by laser lightof frequency ω and photon energy ħω can be usedto generate new frequencies of light. The newly generatedfrequencies are integer multiples of the… …   Wikipedia

• Optical autocorrelation — Classification of the different kinds of optical autocorrelation. In optics, various autocorrelation functions can be experimentally realized. The field autocorrelation may be used to calculate the spectrum of a source of light, while the… …   Wikipedia

• Optical frequency multiplier — An optical frequency multiplier is a nonlinear optical device, in which photons interacting with a nonlinear material are effectively combined to form new photons with greater energy, and thus higher frequency (and shorter wavelength). Two types… …   Wikipedia

• Optical rectification — Electro optic rectification (EOR) (also referred to as optical rectification) is a non linear optical process which consists in the generation of a quasi DC polarization in a non linear medium at the passage of an intense optical beam. For… …   Wikipedia

• Optical tweezers — (originally called single beam gradient force trap ) are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch… …   Wikipedia

• Organic nonlinear optical materials — Organic materials are expected to have relatively strong nonlinear optical properties due to delocalized electrons at π − π* orbitals. This expectation explains extensive search for better NLO materials among organic crystals. L arginine maleate… …   Wikipedia

• 3D optical data storage — is the term given to any form of optical data storage in which information can be recorded and/or read with three dimensional resolution (as opposed to the two dimensional resolution afforded, for example, by CD). [ Three Dimensional Optical Data …   Wikipedia

• Frequency-resolved optical gating — Frequency Resolved Optical Gating, plus couramment désigné par son acronyme FROG, est une méthode de mesure des impulsions lumineuses ultra brèves (de l ordre de la femtoseconde) par auto corrélation. Son principe repose sur un montage de type… …   Wikipédia en Français