optics logo
09.04.2014 Von: Ulrike Bauer-Buzzoni

Atom lens without chromatic aberrations

Dr. Maxim A. Efremov Institut für Quantenphysik, Universität Ulm

A crucial element of the toolbox for atom optics is a lens to focus atom waves. Such an atom lens plays an important role in the realm of atom lithography, especially nowadays for a multitude of technological applications. For this reason, many theoretical suggestions and their realizations in experiments have been made using laser fields. However, most of these realizations suffer from chromatic aberrations.

In this talk I discuss our proposal for a lens that is free of this type of aberration by using a special combination of light waves [1]. Our lens is the atom-optics analog of a conventional achromatic lens. In our scheme a two-level atom interacts with a near-resonant standing light wave formed by two running waves of slightly different wave vectors, and a far-detuned running wave propagating perpendicularly to the standing wave. We show that within the Raman-Nath approximation and for an adiabatically slow atom-light interaction, the phase acquired by the atom is independent of the incident atomic velocity, resulting in the reduced chromatic aberrations. 

[1] M.A. Efremov, P.V. Mironova, and W.P. Schleich, Phys. Rev. A 87, 023604 (2013)

Wednesday, April 9, 2013, 11 a.m.

Lecture room 435, Günther-Scharowsky-Str. 1