Photoexcited carrier relaxation in a-axis oriented YBa2Cu3O7-δ thin films measured by femtosecond time-resolved spectroscopy

Chih-Wei Luo; M. H. Chen; Kaung-Hsiung Wu; Jiunn-Yuan Lin; Jenh-Yih Juang; T. M. Uen; Y. S. Gou

doi:10.1016/S0921-4534(02)02587-X

Photoexcited carrier relaxation in a-axis oriented YBa₂Cu₃O_7-δ thin films measured by femtosecond time-resolved spectroscopy

Chih-Wei Luo^*, M. H. Chen, Kaung-Hsiung Wu, Jiunn-Yuan Lin, Jenh-Yih Juang, T. M. Uen, Y. S. Gou

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

The photoexcited carrier relaxation dynamics in a-axis oriented YBa₂Cu₃O_7-δ (YBCO) thin films has been investigated by femtosecond time-resolved spectroscopy. Distinct responses along b-axis (CuO₃ chain) and c-axis of YBCO have been separated by the polarization-dependent femtosecond pump-probe measurements. It is found that the transient reflectivity (ΔR/R) curves for the electric field E of the polarized light parallel to the b- or c-axes of the a-axis oriented YBCO film (E∥b or E∥c) are significantly different. The opening of superconducting gap in CuO₃ chain was obviously observed from the measurements of the ΔR/R curves for E∥b at temperatures below T_c. However, the ΔR/R curves for E∥c did not exhibit the similar characteristics.

Original language	American English
Pages (from-to)	477-478
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02587-X
State	Published - May 2003
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 20 Aug 2002 → 27 Aug 2002

Keywords

Femtosecond time-resolved spectroscopy
Photoexcited carrier relaxation
Transient reflectivity
a-axis oriented YBaCuO

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10.1016/S0921-4534(02)02587-X

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title = "Photoexcited carrier relaxation in a-axis oriented YBa2Cu3O7-δ thin films measured by femtosecond time-resolved spectroscopy",

abstract = "The photoexcited carrier relaxation dynamics in a-axis oriented YBa2Cu3O7-δ (YBCO) thin films has been investigated by femtosecond time-resolved spectroscopy. Distinct responses along b-axis (CuO3 chain) and c-axis of YBCO have been separated by the polarization-dependent femtosecond pump-probe measurements. It is found that the transient reflectivity (ΔR/R) curves for the electric field E of the polarized light parallel to the b- or c-axes of the a-axis oriented YBCO film (E∥b or E∥c) are significantly different. The opening of superconducting gap in CuO3 chain was obviously observed from the measurements of the ΔR/R curves for E∥b at temperatures below Tc. However, the ΔR/R curves for E∥c did not exhibit the similar characteristics.",

keywords = "Femtosecond time-resolved spectroscopy, Photoexcited carrier relaxation, Transient reflectivity, a-axis oriented YBaCuO",

author = "Chih-Wei Luo and Chen, {M. H.} and Kaung-Hsiung Wu and Jiunn-Yuan Lin and Jenh-Yih Juang and Uen, {T. M.} and Gou, {Y. S.}",

year = "2003",

month = may,

doi = "10.1016/S0921-4534(02)02587-X",

language = "American English",

volume = "388-389",

pages = "477--478",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

note = "proceedings of the 23rd international conference on low temper ; Conference date: 20-08-2002 Through 27-08-2002",

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TY - JOUR

T1 - Photoexcited carrier relaxation in a-axis oriented YBa2Cu3O7-δ thin films measured by femtosecond time-resolved spectroscopy

AU - Luo, Chih-Wei

AU - Chen, M. H.

AU - Wu, Kaung-Hsiung

AU - Lin, Jiunn-Yuan

AU - Juang, Jenh-Yih

AU - Uen, T. M.

AU - Gou, Y. S.

PY - 2003/5

Y1 - 2003/5

N2 - The photoexcited carrier relaxation dynamics in a-axis oriented YBa2Cu3O7-δ (YBCO) thin films has been investigated by femtosecond time-resolved spectroscopy. Distinct responses along b-axis (CuO3 chain) and c-axis of YBCO have been separated by the polarization-dependent femtosecond pump-probe measurements. It is found that the transient reflectivity (ΔR/R) curves for the electric field E of the polarized light parallel to the b- or c-axes of the a-axis oriented YBCO film (E∥b or E∥c) are significantly different. The opening of superconducting gap in CuO3 chain was obviously observed from the measurements of the ΔR/R curves for E∥b at temperatures below Tc. However, the ΔR/R curves for E∥c did not exhibit the similar characteristics.

AB - The photoexcited carrier relaxation dynamics in a-axis oriented YBa2Cu3O7-δ (YBCO) thin films has been investigated by femtosecond time-resolved spectroscopy. Distinct responses along b-axis (CuO3 chain) and c-axis of YBCO have been separated by the polarization-dependent femtosecond pump-probe measurements. It is found that the transient reflectivity (ΔR/R) curves for the electric field E of the polarized light parallel to the b- or c-axes of the a-axis oriented YBCO film (E∥b or E∥c) are significantly different. The opening of superconducting gap in CuO3 chain was obviously observed from the measurements of the ΔR/R curves for E∥b at temperatures below Tc. However, the ΔR/R curves for E∥c did not exhibit the similar characteristics.

KW - Femtosecond time-resolved spectroscopy

KW - Photoexcited carrier relaxation

KW - Transient reflectivity

KW - a-axis oriented YBaCuO

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U2 - 10.1016/S0921-4534(02)02587-X

DO - 10.1016/S0921-4534(02)02587-X

M3 - Conference article

AN - SCOPUS:4243382868

SN - 0921-4534

VL - 388-389

SP - 477

EP - 478

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

T2 - proceedings of the 23rd international conference on low temper

Y2 - 20 August 2002 through 27 August 2002

ER -

Photoexcited carrier relaxation in a-axis oriented YBa₂Cu₃O_7-δ thin films measured by femtosecond time-resolved spectroscopy

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Keywords

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