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)
Physikalisch-Technische Bundesanstalt PTB
Asphericon GmbH
Czech Metrology Institute (CMI)
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)