Material Models

Lorentz-Drude Model in Frequency Domain

It has been shown [1] that a complex dielectric function for some metals and surface plasmas can be expressed in the following form: This form separates explicitly the intraband effects (usually referred to as free electron effects) from interband effect (usually referred to as bound-electron effects). The intraband part εfr ( ω ) of the dielectric function…

Lorentz-Drude Model in Time Domain

The Lorentz-Drude model in (43) is in the frequency domain. However, FDTD is a time domain method and therefore would be suitable for broadband simulations. We need to transform (43) to time domain so that FDTD can handle the fullwave-analysis for the Lorentz-Drude material. This transformation to time domain is accomplished by using the Polarization…

References

[1] Aleksandar D. Rakic, Aleksandra B. Djurisic, et. al., “Optical Properties of Metallic Films for Vertical – Cavity Optoelectronic Devices”. 1998 Optical Society of America, August, Vol. 37, No. 22, Applied Optics, pp. 5271-5283. [2] M. I. Markovic and A. D. Rakic, ” Determination of reflection coefficients of laser light of wavelength from the surface of aluminum…