Open AccessHigh-efficiency terahertz pulse generation via optical rectification by suppressing stimulated Raman scattering process
Author(s) -
Masaya Nagai,
Eiichi Matsubara,
Masaaki Ashida
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.006509
Subject(s) - optical rectification , terahertz radiation , raman scattering , optics , materials science , bandwidth limited pulse , energy conversion efficiency , pulse (music) , pulse shaping , excitation , femtosecond pulse shaping , optoelectronics , ultrashort pulse , terahertz spectroscopy and technology , raman spectroscopy , nonlinear optics , laser , physics , quantum mechanics , detector
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.