Precision measurement of phase-dependent resonance fluorescence spectra


Journal Article

We measure phase-dependent fluorescence spectra for an elementary system: long-lived coherently driven two-level atoms in an atomic beam. Phase-dependent fluorescence spectra measure quadrature noise in the atomic radiation field. These noise spectra are obtained using a homodyne detection scheme that suppresses excess noise by subtracting signals from two identically prepared atomic samples. Noise spectra are obtained for atomic radiation which is in phase [Formula Presented] and out of phase [Formula Presented] with a resonant driving field, as well as [Formula Presented] out of phase with an off-resonant driving field. The measured phase-dependent fluorescence spectra are much richer than ordinary fluorescence spectra, and exhibit many novel features. Particularly interesting are phase-dependent noise spectra for off-resonant excitation. These strikingly exhibit direct manifestations of time ordering, which appear as large differences between the measured [Formula Presented] and [Formula Presented] quadrature noise spectra. The measured noise spectra are in excellent agreement in magnitude and shape with the results of a quantum treatment using no free parameters. © 1998 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Zhao, HZ; Lu, ZH; Bacon, AM; Wang, LJ; Thomas, JE

Published Date

  • January 1, 1998

Published In

Volume / Issue

  • 57 / 2

Start / End Page

  • 1427 - 1447

Electronic International Standard Serial Number (EISSN)

  • 1094-1622

International Standard Serial Number (ISSN)

  • 1050-2947

Digital Object Identifier (DOI)

  • 10.1103/PhysRevA.57.1427

Citation Source

  • Scopus