I want to demonstrate the phenomenon of standing wave in a dielectric ring.
It is quite simple that if the circumference of the ring equals an integral number of light wavelengths, there will be a standing wave in the ring.
So I built a cylinder as the dielectric ring, PML layer and Air layer. (You can find the attachment1)
Then I define a circular polarized light in “Electric Field” boundary condition of Ex=exp(j*emw.k0*z), Ey=exp(j*(emw.k0*z+pi/2)), which is inserted into the cylinder.
But the result is too strange, because a half integral number of wavelength appears. (You can find the attachment2).
Please note that the two spots stand for one wavelength.
It is quite simple that if the circumference of the ring equals an integral number of light wavelengths, there will be a standing wave in the ring.
So I built a cylinder as the dielectric ring, PML layer and Air layer. (You can find the attachment1)
Then I define a circular polarized light in “Electric Field” boundary condition of Ex=exp(j*emw.k0*z), Ey=exp(j*(emw.k0*z+pi/2)), which is inserted into the cylinder.
But the result is too strange, because a half integral number of wavelength appears. (You can find the attachment2).
Please note that the two spots stand for one wavelength.