Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 28: Quantum information: Atoms and ions IV

Q 28.1: Talk

Tuesday, March 18, 2014, 14:00–14:15, UDL HS3038

Rydberg spectroscopy using optical and electrical read out in thermal vapor cells — •Renate Daschner, Daniel Barredo, Robert Löw, Harald Kübler, and Tilman Pfau — 5. Physikalisches Institut, Universität Stuttgart, Germany

Rydberg atoms in a thermal vapor are discussed as promising candidates for the realisation of quantum devices such as single photon sources or single photon subtractors. We present a very sensitive and scalable method to measure the population of highly excited Rydberg states in a thermal vapor cell of rubidium atoms. For this application a cell with structured electrodes and a sealing method based on anodic bonding was invented. The large DC Stark shift of Rydberg atoms provides a possibility to induce transmission or absorption in the medium. Rydberg spectroscopy can be done either by measuring the optical transmission [1] or the Rydberg ionization current [2]. This technique is compatible with state of the art fabrication methods of thin film electronics offering both scalability and miniaturization. Future prospects are arrays of individually addressable sites with integrated electronics e.g. for signal amplification. Modern materials like graphene or doped diamond can improve the properties of the electrodes e.g. transmission and conductivity.

[1] Daschner, R., et al., "Fabrication and characterization of an electrically contacted vapor cell", Opt. Lett. 37, 2271 (2012)

[2] Barredo, D.,et al., "Electrical read out for coherent phenomena involving Rydberg atoms in thermal vapor cells" Phys. Rev. Lett. 110, 123002 (2013)