fdtdpc
Newbie level 2
frequency dependent refractive index comsol
Hi,
I am trying to solve the electromagnetic field of a 60 nm silver cylinder in a 2D scattered field RF module of COMSOL, and I have the optical properties like refractive index (n+i*k) which depend on wavelength considered, i.e. from 300 nm to 800 nm.
What I have dong is listed below:
(1) I edit two file named Agn.txt and Agk.txt, which contain the refractive index (n, k) at different wavelength from 300 nm to 800 nm.
(2) I define two functions named Agn and Agk by interpolation using data from Agn.txt and Agk.txt.
(3) I specify the material properties in term of refractive index as Agn(lambda_rfweh)+i* Agk(lambda_rfweh)
But the result is different with what I calculated using discrete n+i*k values at that wavelength. My question is
What is error from?
What is the best possible way I can incorporate the refractive index (n+i*k) for different wavelength (300-800 nm.) in scattered field problem?
Thanks so much!
Fuyi
Hi,
I am trying to solve the electromagnetic field of a 60 nm silver cylinder in a 2D scattered field RF module of COMSOL, and I have the optical properties like refractive index (n+i*k) which depend on wavelength considered, i.e. from 300 nm to 800 nm.
What I have dong is listed below:
(1) I edit two file named Agn.txt and Agk.txt, which contain the refractive index (n, k) at different wavelength from 300 nm to 800 nm.
(2) I define two functions named Agn and Agk by interpolation using data from Agn.txt and Agk.txt.
(3) I specify the material properties in term of refractive index as Agn(lambda_rfweh)+i* Agk(lambda_rfweh)
But the result is different with what I calculated using discrete n+i*k values at that wavelength. My question is
What is error from?
What is the best possible way I can incorporate the refractive index (n+i*k) for different wavelength (300-800 nm.) in scattered field problem?
Thanks so much!
Fuyi