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Phys Rev Lett. 2011 Oct 14;107(16):163603. Epub 2011 Oct 12.

Molecular orientation and alignment by intense single-cycle THz pulses.

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Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.


Intense single-cycle THz pulses resonantly interacting with molecular rotations are shown to induce field-free orientation and alignment under ambient conditions. We calculate and measure the degree of both orientation and alignment induced by the THz field in an OCS gas sample, and correlate between the two observables. The data presents the first observation of THz-induced molecular alignment in the gas phase.

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