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Molecular Science
Vol. 5 (2011) No. 1 P A0039



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Intense (1012-1013 W/cm2) phase-controlled laser fields consisting of a fundamental light and a second-harmonic light induce the directionally asymmetric tunneling ionization and the resultant orientation-selective molecular ionization. It is demonstrated that orientation-selective molecular ionization induced by phase-controlled ω + 2ω laser fields reflects the geometric structure of the highest occupied molecular orbital. This method was robust, being free of both laser wavelength and pulse-duration constraints, and thus can be applied to a wide range of molecules.

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