Bichromatic UV detection system for atomically-resolved imaging of ions

authored by

T. Nordmann, S. Wickenhagen, M. Doležal, T. E. Mehlstäubler

Abstract

We present a compact bichromatic imaging system, located outside of the vacuum chamber of a trapped ion apparatus that collects the fluorescence of 230.6 and 369.5 nm photons simultaneously on a shared electron-multiplying charge-coupled device (EMCCD) camera. The system contains two lens doublets, consisting of a sphere and an asphere. They provide a numerical aperture of 0.45 and 0.40 at 230.6 and 369.5 nm, respectively, and enable spatially resolved state detection with a large field of view of 300 μm for long ¹¹⁵In⁺/¹⁷²Yb⁺ Coulomb crystals. Instead of diffraction-limited imaging for one wavelength, the focus in this system is on simultaneous single-ion resolved imaging of both species over a large field, with special attention to the deep UV wavelength (230.6 nm) and the low scattering rate of In⁺ ions. The introduced concept is applicable to other dual-species applications.

Organisation(s)

Institute of Quantum Optics
Laboratory of Nano and Quantum Engineering
QuantumFrontiers
CRC 1227 Designed Quantum States of Matter (DQ-mat)

External Organisation(s)

National Metrology Institute of Germany (PTB)
Asphericon GmbH
Czech Metrology Institute

Type

Article

Journal

Review of scientific instruments

Volume

94

ISSN

0034-6748

Publication date

06.2023

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Instrumentation

Electronic version(s)

https://doi.org/10.48550/arXiv.2302.02489 (Access: Open)
https://doi.org/10.1063/5.0145409 (Access: Closed)