Abstract

Photoluminescence spectra from the high-T_c superconductor YBa₂Cu₃O_7−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

Use of x-ray absorption spectroscopy in electronic structure studies of high-Tc superconducting oxides

L. Soderholm and G. L. Goodman
J. Opt. Soc. Am. B 6(3) 483-489 (1989)

Extensive study of the optical spectra for high-temperature superconducting oxides and their related materials from the infrared to the vacuum-ultraviolet energy region

S. Tajima, H. Ishii, T. Nakahashi, T. Takagi, S. Uchida, M. Seki, S. Suga, Y. Hidaka, M. Suzuki, T. Murakami, K. Oka, and H. Unoki
J. Opt. Soc. Am. B 6(3) 475-482 (1989)

Ellipsometric measurements of high-Tc compounds

M. Garriga, J. Humlíček, J. Barth, R. L. Johnson, and M. Cardona
J. Opt. Soc. Am. B 6(3) 470-474 (1989)

Dependence of the infrared absorption on oxygen deficiency in the YBa₂Cu₃O₇₋y superconducting system

G. Ruani, C. Taliani, R. Zamboni, D. Cittone, and F. C. Matacotta
J. Opt. Soc. Am. B 6(3) 409-414 (1989)

Solid-state XeF(D → X) laser at 286 nm

A. I. Katz, J. Feld, and V. A. Apkarian
Opt. Lett. 14(9) 441-443 (1989)