Observation of giant Goos-Hanchen and angular shifts at designed metasurfaces.

ABSTRACT: Metasurfaces with sub-wavelength features are useful in modulating the phase, amplitude or polarization of electromagnetic fields. While several applications are reported for light manipulation and control, the sharp phase changes would be useful in enhancing the beam shifts at reflection from a metasurface. In designed periodic patterns on metal film, at surface plasmon resonance, we demonstrate Goos-Hanchen shift of the order of 70 times the incident wavelength and the angular shifts of several hundred microradians. We have designed the patterns using rigorous coupled wave analysis (RCWA) together with S-matrices and have used a complete vector theory to calculate the shifts as well as demonstrate a versatile experimental setup to directly measure the shifts. The giant shifts demonstrate

SUBMITTER: Yallapragada VJ 

PROVIDER: S-EPMC4725830 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature