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Journal Article

Femtosecond Pulse Sequences Used for Optical Manipulation of Molecular Motion

A. M. Weiner, D. E. Leaird, Gary P. Wiederrecht and Keith A. Nelson
Science
New Series, Vol. 247, No. 4948 (Mar. 16, 1990), pp. 1317-1319
Stable URL: http://www.jstor.org/stable/2873719
Page Count: 3
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Femtosecond Pulse Sequences Used for Optical Manipulation of Molecular Motion
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Abstract

Optical control over elementary molecular motion is enhanced with timed sequences of femtosecond (10$^{-15}$ second) pulses produced by pulse-shaping techniques. Appropriately timed pulse sequences are used to repetitively drive selected vibrations of a crystal lattice, in a manner analogous to repetitively pushing a child on a swing with appropriate timing to build up a large oscillation amplitude. This process corresponds to repetitively "pushing" molecules along selected paths in the lattice. Amplification of selected vibrational modes and discrimination against other modes are demonstrated. Prospects for more extensive manipulation of molecular and collective behavior and structure are clearly indicated.

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