Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 39: Posters: Quantum Optics and Photonics III
Q 39.21: Poster
Wednesday, March 11, 2020, 16:30–18:30, Empore Lichthof
Towards a strontium Rydberg laser for quantum simulation with tweezer arrays — •Thies Plassmann, Shayne Bennetts, Alex Urech, Benjamin Pasquiou, Robert Spreeuw, and Florian Schreck — Institue of Physics, University of Amsterdam, Amsterdam, The Netherlands
We are developing a broadly tunable CW UV-laser system for exciting Rydberg states in strontium atoms. Arrays of single atoms in tweezer traps using Rydberg states for long-range interactions has proven to be a powerful platform for quantum simulation and computation. The rich internal structure of fermionic strontium combined with the second valence electron in alkaline-earth atoms offers exciting new possibilities. However, generating Rydberg states via the metastable 3P0,1,2 intermediate states requires an ultraviolet wavelength around 319 nm. Furthermore, exploiting the whole 3P0,1,2 manifold requires a tunability of 22 THz, a linewidth of 100 kHz and around 0.25 W of power. This poses a challenge in terms of laser design.
We will describe our progress towards developing such a laser system. Our tunable laser architecture, based on [1], begins with 1.58-µ m and 1.07-µ m external cavity diode lasers followed by 5-W fiber amplifiers. Sum frequency generation in PPLN generates a 638-nm output, which is then doubled to 319 nm with a resonant BBO cavity. By stabilizing to an atomic-referenced optical transfer cavity we hope to reach linewidths around 100 kHz.
[1] E. M. Bridge et al. Opt. Express 24, 2281 (2016).