Tunable Narrow-band THz Generation by Type-II DFG with Linearly Chirped Optical Pulses in ZnTe

Narrowband THz pulses were produced via type-II DFG in ZnTe, where two linearly-chirped and orthogonally-polarized broadband near-IR pulses were employed. We tuned the central frequency by adjusting the time delay between the two optical pulses.