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Proceedings Paper

Single-Atom Detection By One-Photon And Two-Photon Sonres
Author(s): J. A. Gelbwachs; C. F. Klein; J. E. Wessel
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Paper Abstract

Saturated Optical Nonresonance Emission Spectroscopy (SONRES) has been applied to metallic vapor detection. Using one-photon cw excitation less than 0. 2 atoms of sodium have been detected in the laser interaction volume with an ambient pressure environment. The method has been applied to the ultraviolet transitions of nickel and platinum using pulsed excitation sources, achieving detection limits less than 100 atoms in the detection volume for an ambient pressure high temperature environment. Resonance enhanced two-photon excitation has also been investigated for atomic detection applications. Experiments demonstrate that the two-photon method can be expected to achieve ultimate detection limits of 10-3 atoms in the laser interaction volume, approaching the theoretical limit of the one-photon SONRES method. The two-photon method provides optimum performance at low pressure and furnishes the sub-Doppler resolution required for highly selective isotope analysis.

Paper Details

Date Published: 5 December 1977
PDF: 5 pages
Proc. SPIE 0113, Advances in Laser Spectroscopy I, (5 December 1977); doi: 10.1117/12.955603
Show Author Affiliations
J. A. Gelbwachs, The Aerospace Corporation (United States)
C. F. Klein, The Aerospace Corporation (United States)
J. E. Wessel, The Aerospace Corporation (United States)

Published in SPIE Proceedings Vol. 0113:
Advances in Laser Spectroscopy I
Ahmed H. Zewail, Editor(s)

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