Doppler-free two-photon spectroscopy of Yb atoms and efficient generation of a cascade of two photons at 611.3 nm and 555.8 nm

Minsoo Song, Duseong Yoon, Tai Hyun Yoon

Research output: Contribution to journalArticle

Abstract

We performed high-resolution Doppler-free two-photon spectroscopy of Yb atoms in an effusive atomic beam and generated a cascade of two photons at 611.3 nm (idler) and 555.8 nm (signal) with a narrow bandwidth of 37 MHz. Efficient population transfer from the ground state (6s21S0) to the upper state (6s7s 1S0), where direct transition at 291.1 nm is dipole forbidden, was achieved through a resonant two-photon excitation enhanced by the electromagnetically-induced transparency mediated by the intermediate state (6s6p 1P1). From the upper state, a cascade of two photons in sequence was emitted via the spin triplet state (6s23P1). Numerical calculations of the density matrix equations taking into account the residual Doppler effect and strong driving fields explain quantitatively the experimental results for the dependences of the idler and the signal beam intensities on the various parameters of the driving fields. We report on the generation of a cascade of two photons with fluxes at the level of a few times 106 photons/s detected at a solid angle of 0.01 sr.

Original languageEnglish
JournalJournal of the Korean Physical Society
Volume59
Issue number41
DOIs
Publication statusPublished - 2011 Oct 14

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cascades
photons
spectroscopy
atoms
Doppler effect
atomic beams
atomic energy levels
dipoles
bandwidth
ground state
high resolution
excitation

Keywords

  • Correlated two-photon generation
  • Doppler-free two-photon spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Doppler-free two-photon spectroscopy of Yb atoms and efficient generation of a cascade of two photons at 611.3 nm and 555.8 nm",
abstract = "We performed high-resolution Doppler-free two-photon spectroscopy of Yb atoms in an effusive atomic beam and generated a cascade of two photons at 611.3 nm (idler) and 555.8 nm (signal) with a narrow bandwidth of 37 MHz. Efficient population transfer from the ground state (6s21S0) to the upper state (6s7s 1S0), where direct transition at 291.1 nm is dipole forbidden, was achieved through a resonant two-photon excitation enhanced by the electromagnetically-induced transparency mediated by the intermediate state (6s6p 1P1). From the upper state, a cascade of two photons in sequence was emitted via the spin triplet state (6s23P1). Numerical calculations of the density matrix equations taking into account the residual Doppler effect and strong driving fields explain quantitatively the experimental results for the dependences of the idler and the signal beam intensities on the various parameters of the driving fields. We report on the generation of a cascade of two photons with fluxes at the level of a few times 106 photons/s detected at a solid angle of 0.01 sr.",
keywords = "Correlated two-photon generation, Doppler-free two-photon spectroscopy",
author = "Minsoo Song and Duseong Yoon and Yoon, {Tai Hyun}",
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language = "English",
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AU - Song, Minsoo

AU - Yoon, Duseong

AU - Yoon, Tai Hyun

PY - 2011/10/14

Y1 - 2011/10/14

N2 - We performed high-resolution Doppler-free two-photon spectroscopy of Yb atoms in an effusive atomic beam and generated a cascade of two photons at 611.3 nm (idler) and 555.8 nm (signal) with a narrow bandwidth of 37 MHz. Efficient population transfer from the ground state (6s21S0) to the upper state (6s7s 1S0), where direct transition at 291.1 nm is dipole forbidden, was achieved through a resonant two-photon excitation enhanced by the electromagnetically-induced transparency mediated by the intermediate state (6s6p 1P1). From the upper state, a cascade of two photons in sequence was emitted via the spin triplet state (6s23P1). Numerical calculations of the density matrix equations taking into account the residual Doppler effect and strong driving fields explain quantitatively the experimental results for the dependences of the idler and the signal beam intensities on the various parameters of the driving fields. We report on the generation of a cascade of two photons with fluxes at the level of a few times 106 photons/s detected at a solid angle of 0.01 sr.

AB - We performed high-resolution Doppler-free two-photon spectroscopy of Yb atoms in an effusive atomic beam and generated a cascade of two photons at 611.3 nm (idler) and 555.8 nm (signal) with a narrow bandwidth of 37 MHz. Efficient population transfer from the ground state (6s21S0) to the upper state (6s7s 1S0), where direct transition at 291.1 nm is dipole forbidden, was achieved through a resonant two-photon excitation enhanced by the electromagnetically-induced transparency mediated by the intermediate state (6s6p 1P1). From the upper state, a cascade of two photons in sequence was emitted via the spin triplet state (6s23P1). Numerical calculations of the density matrix equations taking into account the residual Doppler effect and strong driving fields explain quantitatively the experimental results for the dependences of the idler and the signal beam intensities on the various parameters of the driving fields. We report on the generation of a cascade of two photons with fluxes at the level of a few times 106 photons/s detected at a solid angle of 0.01 sr.

KW - Correlated two-photon generation

KW - Doppler-free two-photon spectroscopy

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