Hi.
I have been calculating the absorption and scattering cross section from a gold nanoparticle in air correctly using the example in the model exchange:
www.comsol.com/community/exchange/215/
However when I change the medium from air to water I am seeing extremely high scattering in the forward direction of the particle to a level which cannot be accurate. To specify the water I simply change the relative permittivity to 1.7689 (from n=1.33^2) set the permeability as 1 and keep the electrical conductivity as comsol states. Does anybody know where I may be going wrong?
Also as a side question, should the thickness of the medium affect the results as I am seeing large variations depending on what I set it as?
Thanks in advance,
Josh
I have been calculating the absorption and scattering cross section from a gold nanoparticle in air correctly using the example in the model exchange:
www.comsol.com/community/exchange/215/
However when I change the medium from air to water I am seeing extremely high scattering in the forward direction of the particle to a level which cannot be accurate. To specify the water I simply change the relative permittivity to 1.7689 (from n=1.33^2) set the permeability as 1 and keep the electrical conductivity as comsol states. Does anybody know where I may be going wrong?
Also as a side question, should the thickness of the medium affect the results as I am seeing large variations depending on what I set it as?
Thanks in advance,
Josh