Optical polarizabilities of large molecules measured in near-field interferometry

Details Optical polarizabilities of large molecules measured in near-field interferometry Optical polarizabilities of large molecules measured in near-field interferometry

2007-08-24

arxiv.org/abs/0708.3320v1

Appl. Phys. B 89, 469-473 (2007)

Physics

Quantum Physics

5 pages, 3 Figures

Scientific paper

10.1007/s00340-007-2873-6

We discuss a novel application of matter wave interferometry to characterize the scalar optical polarizability of molecules at 532 nm. The interferometer presented here consists of two material absorptive gratings and one central optical phase grating. The interaction of the molecules with the standing light wave is determined by the optical dipole force and is therefore directly dependent on the molecular polarizability at the wavelength of the diffracting laser light. By comparing the observed matter-wave interference contrast with a theoretical model for several intensities of the standing light wave and molecular velocities we can infer the polarizability in this first proof-of-principle experiment for the fullerenes C60 and C70 and we find a good agreement with literature values.

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