difference frequency generation

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• Two-photon absorption — (TPA) is the simultaneous absorption of two photons of identical or different frequencies in order to excite a molecule from one state (usually the ground state) to a higher energy electronic state. The energy difference between the involved… …   Wikipedia

• FASOR — Saltar a navegación, búsqueda Para el vector utilizado para representar una onda, véase fasor. En física del láser, FASOR es el acrónimo del inglés Frequency Addition Source of Optical Radiation (Fuente de Radiación Óptica por Suma de… …   Wikipedia Español

• Summenfrequenzspektroskopie — Die Summenfrequenzspektroskopie (SFS, englisch sum frequency spectroscopy, auch sum frequency generation spectroscopy, SFGS, vibrational sum frequency spectroscopy, VSFS, oder sum frequency vibrational spectroscopy, SFVS, genannt) ist… …   Deutsch Wikipedia

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