ENZ metamaterial for ultra high sub-diffractional resolution micoscopy
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Greetings, I have asked this question some time ago, however I got covid so was not able to answer to emails and the thread got locked (support.lumerical.com/hc/requests/89138). I try to model a hyperbolic layered metamaterial consisting of silver and SiO2 layer. In the simulation I represent this metamaterial by a bulk effective material with corresponding anisotropic permittivity. I managed to model my Hyberbolic metamaterial and sufficiently introduce the model into the FDTD. Herein I include the permittivity of the metamaterial. You can clearly see that near the 360 nm wavelength the material exhibit Epsilon near zero (ENZ) behavior.
I guess that the diffraction is so strong that it does not propagate long and the efficiency is very low. You may still find some focus by use of log scale.
In addition, You mentioned that you used two slits but the figures in the paper seems to have some confined field propagation:
The mode from the waveguides might not have so strong diffraction.
BTW: Please also check the material property and see it it is what you imported.
Hello again, I trtied everything you mentioned, the materials are okay, I implemented two waveguides to address the high diffraction efficiency of the diffracting sources. In the epsilon-near-zero regime (358-361 nm) the profile looks like this
Which does not look like anything in the former mentioned study.
I managed to obtain the before discussed behavior. Thanks for the advice, the log-scale was not needed in the end.
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