title: Terahertz difference-frequency generation by tilted amplitude front excitation.
abstract: To circumvent a velocity mismatch between optical pump and terahertz waves in electro-optic crystals, we propose to use dual-wavelength optical beams tilted with respect to their planes of equal amplitude. The tilt is achieved by transmission of a dual-wavelength laser beam through a diffraction grating placed on the crystal boundary. The proposed technique extends optical rectification of tilted-front femtosecond laser pulses to difference-frequency generation with longer (nanosecond) pulses. Our analysis of the technique for LiNbO(3) pumped at 1.3 μm and GaAs pumped at 1.55 μm shows its efficiency.
authors.affiliation: University of Nizhny Novgorod, Nizhny Novgorod 603950, Russia. bakunov@rf.unn.ru
authors.forename: M I
authors.initials: MI
authors.lastname: Bakunov
authors.forename: M V
authors.initials: MV
authors.lastname: Tsarev
authors.forename: E A
authors.initials: EA
authors.lastname: Mashkovich
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State; D055053:Terahertz Radiation