Atom lens without chromatic aberrations

TL;DR

This paper introduces an atom lens design that minimizes chromatic aberrations by using a specific atom-light interaction scheme, ensuring velocity-independent phase shifts under certain approximations.

Contribution

It presents a novel atom lens concept utilizing a near-resonant standing wave and a perpendicular far-detuned wave to reduce chromatic aberrations in atomic focusing.

Findings

Focal length and spot size are calculated for the proposed lens.

The phase shift is shown to be velocity-independent under the Raman-Nath approximation.

The scheme enables chromatic aberration reduction in atom optics.

Abstract

We propose a lens for atoms with reduced chromatic aberrations and calculate its focal length and spot size. 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 perpendicular 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.