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

doi:10.1109/TASC.2003.812529

THz radiation properties of Tl₂Ba₂CaCu₂O_8+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 journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

Previously, we found the resonant THz wave radiation from c-axis oriented underdoped Tl₂Ba₂CaCu₂O_8+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 language	English
Pages (from-to)	3730-3732
Number of pages	3
Journal	IEEE Transactions on Applied Superconductivity
Volume	13
Issue number	2 III
DOIs	https://doi.org/10.1109/TASC.2003.812529
Publication status	Published - Jun 2003
Externally published	Yes
Event	2002 Applied Superconductivity Conference - Houston, TX, United States Duration: Aug 4 2002 → Aug 9 2002

Keywords

Femtosecond laser pulse
High-T superconductor
Terahertz radiation
TlBaCaCuO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/TASC.2003.812529

Cite this

@article{e4d90aad303642ef8501ee0951560c00,

title = "THz radiation properties of Tl2Ba2CaCu2O8+δ thin films excited by femtosecond laser pulses",

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.",

keywords = "Femtosecond laser pulse, High-T superconductor, Terahertz radiation, TlBaCaCuO",

author = "Yukihiro Tominari and Toshihiko Kiwa and Hironaru Murakami and Masayoshi Tonouchi and Henrik Schneidewind and Hagen Wald and Paul Seidel",

note = "Funding Information: Manuscript received August 5, 2002. This work was supported in part by a Grant-in-Aid for Scientific Research (B) no. 12450146 and no. 13555107 from the Japan Society for the Promotion of Science, and on project no. 14655121 from Japan Society for the Promotion of Science, and by the Murata Science Foundation.; 2002 Applied Superconductivity Conference ; Conference date: 04-08-2002 Through 09-08-2002",

year = "2003",

month = jun,

doi = "10.1109/TASC.2003.812529",

language = "English",

volume = "13",

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T1 - THz radiation properties of Tl2Ba2CaCu2O8+δ thin films excited by femtosecond laser pulses

AU - Tominari, Yukihiro

AU - Kiwa, Toshihiko

AU - Murakami, Hironaru

AU - Tonouchi, Masayoshi

AU - Schneidewind, Henrik

AU - Wald, Hagen

AU - Seidel, Paul

N1 - Funding Information: Manuscript received August 5, 2002. This work was supported in part by a Grant-in-Aid for Scientific Research (B) no. 12450146 and no. 13555107 from the Japan Society for the Promotion of Science, and on project no. 14655121 from Japan Society for the Promotion of Science, and by the Murata Science Foundation.

PY - 2003/6

Y1 - 2003/6

N2 - 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.

AB - 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.

KW - Femtosecond laser pulse

KW - High-T superconductor

KW - Terahertz radiation

KW - TlBaCaCuO

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