Terahertz emission from lithium ternary chalcopyrite crystals

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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 LiInSe 2 and LiGaSe 2 were observed at 2.87 and 3.45 THz, respectively.

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