Analysis of Casimir forces with window functions: Kramers-Kronig general approach for real measured dielectric data

O. Shpak, G. Palasantzas*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
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In this work we describe how the window method, which has been used with ideal Kramers-Kroning (K-K) consistent dielectric functions, is affected by real optical data where some degree of K-K inconsistency is always present. Analysis using measured data of the frequency-dependent dielectric function for gold and phase-change materials shows that the window method can in some cases amplify the errors introduced in the calculation of the Casimir force due to K-K inconsistency instead of minimizing them. The latter indicates that caution is required for the proper choice of the window function for dielectric data analysis and Casmir force calculations.

Original languageEnglish
Article number044501
Pages (from-to)044501-1-044501-4
Number of pages4
JournalPhysical Review A
Issue number4
Publication statusPublished - 5-Oct-2011

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