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MO: Fachverband Molekülphysik

MO 22: Femtosecond Spectroscopy IV

MO 22.3: Vortrag

Donnerstag, 17. März 2011, 15:00–15:15, TOE 317

Pump-Dump CARS: Realization of Laser Driven Molecular Logic Gates — •Mehdi Mohammad Kazemi, Mahesh Namboodiri, and Arnulf Materny — Center of Functional Materials and Nanomolecular Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany

Optically driven molecular switches are of great interest. Multi-photon interactions have been used in order to realize a logic gate. The order of the nonlinear process decides about the complexity of the component, and the pulse duration as well as molecular dynamics parameters about its response time. The possibility to use a stimulated Raman excitation (two laser pulses) with subsequent coherent anti-Stokes Raman scattering (CARS, four-photon process) for the implementation of a three-bit gate (“Toffoli gate”) is discussed. There, vibrational modes of the molecules are switched on and off by the different laser pulses. By a proper combination, all possible gates (AND, OR, etc.) can be constructed. With the help of femtosecond laser pulses, an interplay of CARS probing and initial pump excitation and dump de-excitation is possible on suited molecular systems.