THz radiation properties of Tl2Ba2CaCu2O8+δ thin films excited by femtosecond laser pulses

Yukihiro Tominari, Toshihiko Kiwa, Hironaru Murakami, Masayoshi Tonouchi, Henrik Schneidewind, Hagen Wald, Paul Seidel

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Previously, we found the resonant THz wave radiation from c-axis oriented underdoped Tl2Ba2CaCu2O8+δ (Tl-2212) thin films by femtosecond laser pulse illumination under magnetic field. The properties of the resonant THz wave were well explained by the Josephson plasma resonance phenomenon. In the present study, the THz radiation properties were investigated for an overdoped Tl-2212 thin films. The amplitudes of THz waveform radiated under a bias current condition is much smaller than those of previous sample, while any trace of resonant THz signals could not be observed under magnetic field. These experimental results indicate the possibility that the initial THz wave radiated by ultrafast modulation in eddy-current around the vortices has an important role to excite the collective mode oscillation.

Original languageEnglish
Pages (from-to)3730-3732
Number of pages3
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2 III
DOIs
Publication statusPublished - Jun 2003
Externally publishedYes

Fingerprint

Ultrashort pulses
Radiation
Thin films
plasma resonance
radiation
thin films
pulses
eddy currents
magnetic fields
Magnetic fields
lasers
electromagnetic radiation
waveforms
Bias currents
illumination
vortices
Eddy currents
modulation
oscillations
Vortex flow

Keywords

  • Femtosecond laser pulse
  • High-T superconductor
  • Terahertz radiation
  • TlBaCaCuO

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

THz radiation properties of Tl2Ba2CaCu2O8+δ thin films excited by femtosecond laser pulses. / Tominari, Yukihiro; Kiwa, Toshihiko; Murakami, Hironaru; Tonouchi, Masayoshi; Schneidewind, Henrik; Wald, Hagen; Seidel, Paul.

In: IEEE Transactions on Applied Superconductivity, Vol. 13, No. 2 III, 06.2003, p. 3730-3732.

Research output: Contribution to journalArticle

Tominari, Yukihiro ; Kiwa, Toshihiko ; Murakami, Hironaru ; Tonouchi, Masayoshi ; Schneidewind, Henrik ; Wald, Hagen ; Seidel, Paul. / THz radiation properties of Tl2Ba2CaCu2O8+δ thin films excited by femtosecond laser pulses. In: IEEE Transactions on Applied Superconductivity. 2003 ; Vol. 13, No. 2 III. pp. 3730-3732.
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