Refractive-index dispersion of garnet films derived from accurate measurement of film thickness
- 15 August 1978
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 33 (4) , 291-293
- https://doi.org/10.1063/1.90342
Abstract
Refractive‐index dispersion of magnetic garnet films of composition (YSmLuCa)3(GeFe)5O12 is reported in a wavelength range of 0.55–1.5 μ. The dispersion was calculated from the film’s optical interference data and thickness value which was accurately determined by the technique of thin‐film optical waveguide measurement. The calculated index values at the interference fringe locations were fitted to a two‐term Sellmeier formulation. The accuracy was estimated to be better than 0.3%.Keywords
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