Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 21: Precision Spectroscopy of Atoms and Ions II (with A)
Q 21.4: Talk
Tuesday, March 24, 2015, 12:00–12:15, M/HS1
Microwave Electrometry with Rydberg Atoms in a Vapor Cell — •Harald Kübler1,2, Jonathan A. Sedlacek1, Haoquan Fan1, Santosh Kumar1, Renate Daschner2, Robert Löw2, Tilman Pfau2, and James p. Shaffer1 — 1Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, 440 W. Brooks St. Norman, Oklahoma 73019, USA — 25. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart Germany
Quantum based standards of length and time as well as measurements of other useful physical quantities, ex. magnetic fields, are important because quantum systems, like atoms, show clear advantages for providing stable and uniform measurements. We demonstrate a new method for measuring microwave electric fields based on quantum interference in a Rubidium atom. Using a bright resonance prepared within an electromagnetically induced transparency window we are able to achieve a sensitivity of 30 µ V cm−1√Hz−1 with a modest setup [1]. This method can be used for vector electrometry with a precision below 1∘ [2] and microwave field imaging with a sub-wavelength resolution [3]. Furthermore we show first results on exploiting the dispersive features of the system.
[1] J.A. Sedlacek, et al. Nature Physics 8, 819 (2012)
[2] J.A. Sedlacek, et al. Phys. Rev. Lett. 111, 063001 (2013)
[3] H. Q. Fan, et al. Opt. Lett. 39, 3030-3033 (2014)