3 papers
cond-mat.mtrl-sci2025
Temperature-Dependent Dielectric Function of Calcium Fluoride
T. Das, D. Alam, C. A. Ullrich +1
The optical properties of calcium fluoride (fluorspar, CaF2) are mainly determined by a strongly temperature-dependent giant infrared (IR) peak, and a series of nearly temperature-…
cond-mat.mtrl-sci2025
Coupled Oscillators and Dielectric Function
T. Das, C. A. Ullrich, U. D. Jentschura
A generalized Sellmeier model, also referred to as the Lorentz-Dirac model, has been used for the description of the dielectric function of a number of technologically important ma…
cond-mat.other2023
Retardation Effects in Atom-Wall Interactions
T. Das, C. A. Ullrich, U. D. Jentschura
The onset of retardation effects in atom-wall interactions is studied. It is shown that the transition range from the 1/z^3 short-range (van der Waals) interaction to the 1/z^4 lon…