Femtosecond reflection spectroscopy in La1.5Sr 0.5CoO4

T. Egawa, Y. Okimoto, R. Fukaya, Ken Onda, T. Ishikawa, S. Y. Koshihara, A. Isayama, T. Sasagawa

Research output: Contribution to journalArticle

Abstract

Ultrafast optical response has been investigated using fs laser system on a perovskite-type cobalt oxide, La1.5Sr0.5CoO4. After the photoirradiation at room temperature, the time profile of relative change of reflectance (ΔR/R) shows a sudden change within the pulse duration (≈ 150 fs) and decays with a lifetime of ≈ 330 fs. The sign of ΔR/R after the photoexcitation is positive in the mid-infrared region (at 0.50 eV) while negative in the visible energy region (at 2.0 eV), implying photoinduced change of the electronic structure after the photoexcitation.

Original languageEnglish
Pages (from-to)307-309
Number of pages3
JournalActa Physica Polonica A
Volume121
Issue number2
DOIs
Publication statusPublished - Jan 1 2012

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photoexcitation
cobalt oxides
spectroscopy
pulse duration
electronic structure
reflectance
life (durability)
decay
room temperature
profiles
lasers
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Egawa, T., Okimoto, Y., Fukaya, R., Onda, K., Ishikawa, T., Koshihara, S. Y., ... Sasagawa, T. (2012). Femtosecond reflection spectroscopy in La1.5Sr 0.5CoO4 Acta Physica Polonica A, 121(2), 307-309. https://doi.org/10.12693/APhysPolA.121.307

Femtosecond reflection spectroscopy in La1.5Sr 0.5CoO4 . / Egawa, T.; Okimoto, Y.; Fukaya, R.; Onda, Ken; Ishikawa, T.; Koshihara, S. Y.; Isayama, A.; Sasagawa, T.

In: Acta Physica Polonica A, Vol. 121, No. 2, 01.01.2012, p. 307-309.

Research output: Contribution to journalArticle

Egawa, T, Okimoto, Y, Fukaya, R, Onda, K, Ishikawa, T, Koshihara, SY, Isayama, A & Sasagawa, T 2012, 'Femtosecond reflection spectroscopy in La1.5Sr 0.5CoO4 ', Acta Physica Polonica A, vol. 121, no. 2, pp. 307-309. https://doi.org/10.12693/APhysPolA.121.307
Egawa T, Okimoto Y, Fukaya R, Onda K, Ishikawa T, Koshihara SY et al. Femtosecond reflection spectroscopy in La1.5Sr 0.5CoO4 Acta Physica Polonica A. 2012 Jan 1;121(2):307-309. https://doi.org/10.12693/APhysPolA.121.307
Egawa, T. ; Okimoto, Y. ; Fukaya, R. ; Onda, Ken ; Ishikawa, T. ; Koshihara, S. Y. ; Isayama, A. ; Sasagawa, T. / Femtosecond reflection spectroscopy in La1.5Sr 0.5CoO4 In: Acta Physica Polonica A. 2012 ; Vol. 121, No. 2. pp. 307-309.
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