Observation of below-gap plasmon excitations in superconducting YBa2Cu3O7 films

F. J. Dunmore; D. Z. Liu; H. D. Drew; S. Das Sarma; Qi Li; D. B. Fenner

doi:10.1103/PhysRevB.52.R731

Observation of below-gap plasmon excitations in superconducting YBa2Cu3O7 films

F. J. Dunmore, D. Z. Liu, H. D. Drew, S. Das Sarma, Qi Li, D. B. Fenner

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Abstract

Finite-wave-vector collective plasmon resonances have been observed in far-infrared transmission measurements on superconducting YBa2Cu3O7 films. An Al grating is used to couple IR radiation to collective two-dimensional plasma modes. The plasmon dispersion, measured by using different grating periods, spans the frequency range of the energy gap. The strengths of the plasma resonances weaken as the temperature approaches Tc from below. The results are analyzed using a grating coupler theory that includes the hybridization of the plasmons with the diffraction modes.

Original language	English (US)
Pages (from-to)	R731-R734
Journal	Physical Review B
Volume	52
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.52.R731
State	Published - 1995

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1103/PhysRevB.52.R731

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title = "Observation of below-gap plasmon excitations in superconducting YBa2Cu3O7 films",

abstract = "Finite-wave-vector collective plasmon resonances have been observed in far-infrared transmission measurements on superconducting YBa2Cu3O7 films. An Al grating is used to couple IR radiation to collective two-dimensional plasma modes. The plasmon dispersion, measured by using different grating periods, spans the frequency range of the energy gap. The strengths of the plasma resonances weaken as the temperature approaches Tc from below. The results are analyzed using a grating coupler theory that includes the hybridization of the plasmons with the diffraction modes.",

author = "Dunmore, {F. J.} and Liu, {D. Z.} and Drew, {H. D.} and {Das Sarma}, S. and Qi Li and Fenner, {D. B.}",

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T1 - Observation of below-gap plasmon excitations in superconducting YBa2Cu3O7 films

AU - Dunmore, F. J.

AU - Liu, D. Z.

AU - Drew, H. D.

AU - Das Sarma, S.

AU - Li, Qi

AU - Fenner, D. B.

PY - 1995

Y1 - 1995

N2 - Finite-wave-vector collective plasmon resonances have been observed in far-infrared transmission measurements on superconducting YBa2Cu3O7 films. An Al grating is used to couple IR radiation to collective two-dimensional plasma modes. The plasmon dispersion, measured by using different grating periods, spans the frequency range of the energy gap. The strengths of the plasma resonances weaken as the temperature approaches Tc from below. The results are analyzed using a grating coupler theory that includes the hybridization of the plasmons with the diffraction modes.

AB - Finite-wave-vector collective plasmon resonances have been observed in far-infrared transmission measurements on superconducting YBa2Cu3O7 films. An Al grating is used to couple IR radiation to collective two-dimensional plasma modes. The plasmon dispersion, measured by using different grating periods, spans the frequency range of the energy gap. The strengths of the plasma resonances weaken as the temperature approaches Tc from below. The results are analyzed using a grating coupler theory that includes the hybridization of the plasmons with the diffraction modes.

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JO - Physical Review B

JF - Physical Review B

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Observation of below-gap plasmon excitations in superconducting YBa2Cu3O7 films

Abstract

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