Theoretical and experimental investigation of surface plasmon resonance (SPR) assisted radially sheared interference
imaging using a birefringent lens having two longitudinally shifted focal points has been reported. As Wolllaston prism
can introduce lateral shear between the two mutual orthogonal polarizations of radially sheared pattern, Moiré-like
pattern is produced at overlapping region of those patterns. Brief theory and experimental demonstration of coherent and
incoherent Moiré fringe generation has been done. Surface plasmon resonance (SPR) mediated Moiré pattern has been
demonstrated which can be further utilized for other nanophotonic applications.
Moiré pattern, produced by the overlapping of two radially sheared beams emerging from two longitudinally shifted
focal points of a birefringent lens has been experimentally demonstrated. Coherent and incoherent Moiré patterns are
generated with and without analyzer. Birefringent samples like mica sheets with opposite crystal axis to that of the
birefringent lens modulate the Moiré pattern. Mica sheet of different thicknesses have been used to demonstrate the
effect of thickness on phase retardation, hence on fringe pattern. Experimentally birefringence has been calculated by
fringe analysis and compared with theoretically simulated birefringence.