Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2005-03-23
Rev. Sci. Instrum. 76, 083108 (2005)
Physics
Condensed Matter
Other Condensed Matter
10 pages, 7 figures
Scientific paper
10.1063/1.1979470
A universal method of extraction of the complex dielectric function $\epsilon(\omega)=\epsilon_{1}(\omega)+i\epsilon_{2}(\omega)$ from experimentally accessible optical quantities is developed. The central idea is that $\epsilon_{2}(\omega)$ is parameterized independently at each node of a properly chosen anchor frequency mesh, while $\epsilon_{1}(\omega)$ is dynamically coupled to $\epsilon_{2}(\omega)$ by the Kramers-Kronig (KK) transformation. This approach can be regarded as a limiting case of the multi-oscillator fitting of spectra, when the number of oscillators is of the order of the number of experimental points. In the case of the normal-incidence reflectivity from a semi-infinite isotropic sample the new method gives essentially the same result as the conventional KK transformation of reflectivity. In contrast to the conventional approaches, the proposed technique is applicable, without readaptation, to virtually all types of linear-response optical measurements, or arbitrary combinations of measurements, such as reflectivity, transmission, ellipsometry {\it etc.}, done on different types of samples, including thin films and anisotropic crystals.
No associations
LandOfFree
Kramers-Kronig constrained variational analysis of optical spectra does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Kramers-Kronig constrained variational analysis of optical spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kramers-Kronig constrained variational analysis of optical spectra will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-134527