Abstract

Strong electric and magnetic fields in the terahertz frequency range are required for many applications, including particle acceleration, molecular orientation, and terahertz streaking techniques. The strongest fields are currently generated by optical rectification of ultrashort laser pulses in nonlinear crystals. Multiphoton absorption is considered as one of the main factors that limits the optical pump intensity. It leads to a depletion of the pump pulse and photogeneration of free carriers that absorb terahertz radiation.

© 2019 Japan Society of Applied Physics, The Optical Society (OSA)

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