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Optics Letters

Optics Letters


  • Vol. 14, Iss. 14 — Jul. 15, 1989
  • pp: 725–727

Alkali D-line absorption in the luminescence spectrum of solid–fluid interfaces under high-intensity laser excitation

K. M. Yoo and R. R. Alfano  »View Author Affiliations

Optics Letters, Vol. 14, Issue 14, pp. 725-727 (1989)

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Photoluminescence spectra from the high-Tc superconductor YBa2Cu3O7−x, the semiconductor GaAs, and GaP under intense picosecond laser excitation were studied with their surfaces exposed to different alkali solutions. Strong absorption of D lines of neutral-alkali atoms was observed in these spectra. These absorption lines indicate that free ground-state alkali atoms were formed by recombination of the sublimated alkali ions with photoelectrons through various processes.

© 1989 Optical Society of America

Original Manuscript: January 23, 1989
Manuscript Accepted: May 3, 1989
Published: July 15, 1989

K. M. Yoo and R. R. Alfano, "Alkali D-line absorption in the luminescence spectrum of solid–fluid interfaces under high-intensity laser excitation," Opt. Lett. 14, 725-727 (1989)

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