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

作者：Shpak O; Pa****ntzas G^*

来源：Physical Review A, 2011, 84(4): 044501.

DOI：10.1103/PhysRevA.84.044501

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.

• 出版日期2011-10-5