Hello, dear researchers, some researchers do not believe that we can detect the near field or evanescent field using a far field microscopy but some believe that in some directions polarization field vector can sustain its near-field polarization status and can come out to the far field. I want to ask that, is that right? if we impinge light with some angle on the sample can there be some possibilities that we can get near field signals on the far field. Recently I have got some of the ripples (high-frequency signals in the far field for azimuthal angle case when I used the dark field source). How can I quantitively or qualitatively identify those near field signals on the detectors? What are the directions on which we can say that there are higher possibilities of detecting near field on the far field region ? if they are non-propagating field then why I get them on far field? I am confused. Can anyone help me to solve this puzzle, how can we interpret this theory?
Thanks, Sir Behnam Farid, according to the Emily wolf "in some special directions for example x=0, y=0, and z=0. the evanescent field contributes to the far field but these special directions are of no physical significance, being just mathematical oddities, for
in the case that it is just considered that the field cannot have different behavior along some directions from that in others, because it is spherically symmetric". Can you explain this point???
Thanks, Sir Behnam Farid, the references are as attached. There are two types of the researchers in this regard.
one says that Evanescent contributes to the Far Field (M.Xiao) (the reference is also as attached)
other classes of the scientists (Emily Wolf , C. J. R. SHEPPARD etc.) say no, they are not I am quite confused in this regard, in fact, they comment to each other. I have looked into the literature, It seems they are fighting with each other. And these papers and comments have been published in famous journals like Optics Letters, Journal of modern Physics, JOSA etc.
@Behnam Farid, Sir, Thanks a lot for your really informative and useful comments. Sir, actually I am using a polarization modulation technique (far-field super-resolution) which images the particle in the form of polarization parameters such as Stokes, phase shift, and azimuthal angle. when I applied Dark-field PIMI (the technique name...https://www.osapublishing.org/oe/abstract.cfm?uri=oe-22-17-20446) to a nanosphere it gives me the ripples in the x=0 direction in the case of azimuthal angle image even after 2 microns after the center of the particle (450 nm radius--working wavelength was 532 nm) . from the results I may assume that in this direction the polarization status remains to preserve even in far field whereas in another direction there are no ripples has been found. I did not understand what is the reason behind this??? That is why I am curious to know about that can in a far-field polarization super resolution modulation technique , polarization signals remain to preserve their status even in the far-field.
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