LRSP resonance enhanced spatial and angular Goos–Hanchen shift and Imbert–Fedorov shift for Gaussian beam, Laguerre–Gaussian beam and Bessel beam

Abstract

A new theoretical approach towards the composite effect of spatial and angular Goos–Hanchen (GH) shift and Imbert–Fedorov (IF) shift for the Gaussian beam, Laguerre–Gaussian beam and Bessel beam with long range surface plasmon (LRSP) resonance is observed, designed and simulated through the variation of incident angle at a wavelength of 1550nm where the four layered Kreschmann–Rather geometry comprises a ZnSe prism, a liquid crystal layer of E44 and two metal layers of silver. To the best of our knowledge several articles have been devoted, separately considering the Gaussian beam, Laguerre–Gaussian beam and Bessel beam without considering the effect of spatial and angular GH shift and IF shift whereas the exact output beam position can only be identified with the composite effect of these shifts. The investigation of these spatial and angular shifts for Gaussian beam and different orders of Laguerre–Gaussian beam are calculated and represented where these lateral shifts increase with the increment of the modes and further these lateral shifts for Bessel beam have also been analyzed. With this new approach various avenues expedite the way of futuristic applications in the field of fine tuning in optical switching with the accurate beam position using different beams.