The low- (0.1-2 THz) and mid-frequency (2-20 THz) bands of the THz range can be accessed by optical rectification (OR) in LiNbO3 (LN) [1] and organic crystals [2], respectively. The low -frequency band is optimally fitting for acceleration of charged particle beams. However, further increasing the THz pulse energy and field strength is challenging.

© 2019 IEEE

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