We manipulate terahertz (THz) waveforms by optical rectification in nonlinear optical crystals using a pair of temporally separated femtosecond pulses. Two single-cycle THz pulses coherently control rotational transitions in gas-phase HCl molecules. Continuously tunable narrowband THz pulses are generated in a fanned-out, periodically poled lithium niobate crystal. The shape of the multicycle THz pulses is controlled by adjusting the relative time delay and intensity between the two optical pulses.
© 2006 Optical Society of America
W. C. Hurlbut, B. J. Norton, N. Amer, and Yun-Shik Lee, "Manipulation of terahertz waveforms in nonlinear optical crystals by shaped optical pulses," J. Opt. Soc. Am. B 23, 90-93 (2006)