High-Resolution Imaging and Optical Control of Bose-Einstein Condensates in an Atom Chip Magnetic Trap

TL;DR

This paper presents a novel high-resolution imaging and optical control system for Bose-Einstein condensates using a specialized atom chip that combines magnetic trapping with optical access, enabling advanced manipulation and imaging of ultracold atoms.

Contribution

The work introduces a combined silicon and glass atom chip design that allows high-resolution imaging and optical control of Bose-Einstein condensates in a magnetic trap, with holographic light patterning for multi-region condensate creation.

Findings

Achieved in-trap imaging resolution of 2.5 microns.

Generated up to four Bose-Einstein condensates simultaneously.

Demonstrated optical slicing of magnetic traps using holography.

Abstract

A high-resolution projection and imaging system for ultracold atoms is implemented using a compound silicon and glass atom chip. The atom chip is metalized to enable magnetic trapping while glass regions enable high numerical aperture optical access to atoms residing in the magnetic trap about 100 microns below the chip surface. The atom chip serves as a wall of the vacuum system, which enables the use of commercial microscope components for projection and imaging. Holographically generated light patterns are used to optically slice a cigar-shaped magnetic trap into separate regions; this has been used to simultaneously generate up to four Bose-condensates. Using fluorescence techniques we have demonstrated in-trap imaging resolution down to 2.5 microns