Abstract

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

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