- #1
minerva
- 93
- 6
Consider a metal such as Al.
How do we look up or determine the relative permittivity of the metal?
Suppose we have some known incident frequency, say about c/500nm for visible light.
We can look up the bulk plasma frequency (3.7 PHz for Al), can it be calculated from that?
For context, what I want to calculate is the desired hole diameter and geometry as a function of the desired filter centre wavelength, in a nanoscale plasmonic hole-grid structure like this.
https://www.intechopen.com/books/pl...ce-plasmon-polaritons-in-cmos-digital-imaging
We know the metal thickness, want to design the appropriate hole spacing and diameter, know the metal chosen, and know the permittivity of the substrate (glass etc) material.
How do we look up or determine the relative permittivity of the metal?
Suppose we have some known incident frequency, say about c/500nm for visible light.
We can look up the bulk plasma frequency (3.7 PHz for Al), can it be calculated from that?
For context, what I want to calculate is the desired hole diameter and geometry as a function of the desired filter centre wavelength, in a nanoscale plasmonic hole-grid structure like this.
https://www.intechopen.com/books/pl...ce-plasmon-polaritons-in-cmos-digital-imaging
We know the metal thickness, want to design the appropriate hole spacing and diameter, know the metal chosen, and know the permittivity of the substrate (glass etc) material.