Phys. Rev. Lett. 81, 4592–4595 (1998)Sensitive Electric Field Measurement by Fluorescence-Dip Spectroscopy of Rydberg States of Atomic HydrogenReceived 27 July 1998; published in the issue dated 23 November 1998 Fluorescence-dip spectroscopy based on an optical double resonance is used to probe the Stark splitting in highly excited Rydberg states of atomic hydrogen. After Doppler-free two-photon excitation to n = 3, fluorescence at Balmer α is observed. When the radiation of a second laser is tuned over the resonance between n = 3 and a Rydberg state, the Stark splitting manifests itself as a series of dips in the Balmer- α fluorescence intensity. Rydberg states up to n = 55 can be identified. The minimum detectable electric field is 5V/cm. This is about an order of magnitude more sensitive than other laser-induced fluorescence techniques. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.4592
DOI:
10.1103/PhysRevLett.81.4592
PACS:
32.60.+i
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