Two-step photoionization of cold atoms by two-color evanescent-light waves and application to atom detection with high spatial resolution

Kazuhiro Yamamoto, Haruhiko Ito, Kouki Totsuka, Tomohiro Sato

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We consider a new scheme of optically ionizing atoms with 10-nm-order spatial resolution. In this method, two-color near-field lights are generated on a narrow slit illuminated by two-color evanescent lights via total-internal reflection of two-wavelength light beams. In order to illustrate the feasibility, we first obtain the ionization cross section from two-step photionization of cold Rb atoms by two-color evanescent lights on a plane surface of a prism. Then, we numerically estimate the ionization efficiency as a function of the slit width using Bethe formula. The scheme is useful for detecting ground-state atoms under less perturbation by scattered light.

Original languageEnglish
Pages (from-to)692-695
Number of pages4
JournalOptics Communications
Volume265
Issue number2
DOIs
Publication statusPublished - Sep 15 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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