title: High-efficiency terahertz pulse generation via optical rectification by suppressing stimulated Raman scattering process.
abstract: We experimentally demonstrate high-efficiency terahertz pulse generation via optical rectification in LiNbO3. The spectral broadening of an excitation pulse via the stimulated Raman scattering process coincides with high-efficiency terahertz pulse generation, which enhances undesired stretching of the excitation pulse owing to the very high group velocity dispersion in LiNbO3. We avoid this by the bandwidth control of the excitation pulse and achieve the highest reported efficiency of 0.21% for energy conversion into a THz pulse.
authors.affiliation: Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan. mnagai@mp.es.osaka-u.ac.jp
authors.forename: Masaya
authors.initials: M
authors.lastname: Nagai
authors.forename: Eiichi
authors.initials: E
authors.lastname: Matsubara
authors.forename: Masaaki
authors.initials: M
authors.lastname: Ashida
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*