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Extending nonlinear coherent quantum control with intense terahertz pulses

C. Lange, T. Maag, A. Bayer, S. Baierl, M. Hohenleutner, Dieter Schuh, Dominique Bougeard, R. Huber, Martin Mootz, John E. Sipe, S. W. Koch, M. Kira

Published Oct 19, 2016• 0 citations
Publisher
DOI
10.1117/2.1201608.006634

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Abstract We theoretically investigate molecular vibrational dynamics driven by intense and broadband terahertz (THz) pulses. The light–nuclei interaction is derived from a fully quantum-mechanical minimal coupling Hamiltonian to analyse the direct excitation of vibrational modes by the THz pulses. We show that for diatomic molecules a ‘vibrational moment’ can be defined in a manner similar to the dipole moment and that it has non-zero values only for heteronuclear diatomic molecules. Taking ultra-cold heteronuclear diatomic molecules as examples, we show that vibrational-mode excitation by THz pulse irradiation occurs in an almost stepwise manner, especially for low vibrational modes. A coherent control method using a frequency-controlled THz pulse sequence is also proposed.
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