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We have investigated the terahertz (THz) emission from lithium ternary chalcopyrite crystals illuminated by 1560-nm femtosecond pump laser pulses. Monocyclic THz emission and narrowband THz emission from the coherent phonons in LiInSe2 and LiGaSe2 were observed at 2.87 and 3.45 THz, respectively.
Semi-empirical calculations successfully predicted the terahertz (THz) absorption spectrum associated with intra- and intermolecular interactions in 1,4-dihydroxynaphthalene. Results are in excellent agreement with spectroscopy data in the 0.5-6 THz region using GaP wave THz source.
We report the room temperature terahaertz (THz) transmission spectroscopy measurements of mono-and di-substituted hydroxynaphthalenes in the 0.5-to 6-THz region using a GaP THz wave generator. Several absorption peaks were observed and ascribed to be the fundamental vibrational modes of each of the isomers which were also validated by ab initio calculations. The absorption peak at 4 THz is attributed...
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