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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 6 — Jun. 1, 2008
  • pp: 1046–1050

Excited-state absorption spectra for optically forbidden f f transitions in an Eu 3 + : Y 2 SiO 5 crystal and Eu 3 + aqueous solution

Shigeto Iwai, Masanori Tanaka, Masaharu Mitsunaga, Takayoshi Kobayashi, and Eiji Tokunaga  »View Author Affiliations


JOSA B, Vol. 25, Issue 6, pp. 1046-1050 (2008)
http://dx.doi.org/10.1364/JOSAB.25.001046


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Abstract

Extremely small transmission change spectra due to 4 f 4 f transitions in a rare-earth ion Eu 3 + in a crystal and in an aqueous solution were measured, to the best of our knowledge, for the first time. By multichannel double-lock-in pump-probe spectroscopy, photoluminescence (PL) and difference transmission spectra were simultaneously recorded for an Eu 3 + : Y 2 SiO 5 crystal with broadband lamp light sources for both the pump and the probe. A very weak transmission change signal hidden behind a 1–2 orders of magnitude more intense PL background signal was readily extracted. By comparing the transmission decrease due to the excited-state absorption (ESA) and the transmission increase due to the ground-state depletion it was found in the crystal that the oscillator strengths for the f f transitions to the same final states are of the same order of magnitude for both the spin-allowed transitions from D 0 5 in the ESA and the spin-forbidden transitions from F 0 7 in the ground-state absorption (GSA). In addition, crystal-field split f f transitions that have been hidden by the intense charge-transfer band in the GSA were revealed.

© 2008 Optical Society of America

OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(160.5690) Materials : Rare-earth-doped materials
(210.4810) Optical data storage : Optical storage-recording materials
(300.6420) Spectroscopy : Spectroscopy, nonlinear

ToC Category:
Spectroscopy

History
Original Manuscript: March 5, 2008
Manuscript Accepted: April 2, 2008
Published: May 27, 2008

Citation
Shigeto Iwai, Masanori Tanaka, Masaharu Mitsunaga, Takayoshi Kobayashi, and Eiji Tokunaga, "Excited-state absorption spectra for optically forbidden f-f transitions in an Eu3+:Y2SiO5 crystal and Eu3+ aqueous solution," J. Opt. Soc. Am. B 25, 1046-1050 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-6-1046

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