Abstract
Otto configuration attenuated total reflection (ATR) measurements of the excitation of surface plasmons in the infrared have been carried out on YBCO films deposited on MgO (100) substrates. The dielectric constants for YBCO at 3.392 μm are determined to be -10+15i for c-axis material. The anisotropic nature of the cuprate is seen from films with other orientations: nearly a-axis material has constants of 4.0+7.0i. It is thus not metallic in its optical response along the c-axis which lies parallel to the substrate plane. Ellipsometric measurements in the visible on c-axis material point to a maximum surface plasmon energy of 1 eV.
Original language | English |
---|---|
Pages (from-to) | 943-946 |
Number of pages | 4 |
Journal | Journal of Superconductivity |
Volume | 7 |
Issue number | 6 |
DOIs | |
Publication status | Published - Dec 1994 |
Keywords
- YBCO
- attenuated total reflection
- ellipsometry
- optical constants
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Physics and Astronomy (miscellaneous)