Berry Phase Control of Curved Grating Metasurfaces
Abstract
common effect is nonlinear offset current. Experiment has verifi ed photon drag effect when polarized light acted on a deformed grating with a
centrally symmetric structure. In the present study, a deformed grating metasurface is proposed, from which the Berry phase response is calculated through numerical simulations. Then, the Berry phase effect of the overall structure is theoretically explained and characterized in terms
of the photon drag effect, by calculating the overall optical force and photovoltage in the metasurface. For Berry phase control by different
structural parameters, such as the radian of the bending curve in the grating structure, we demonstrate that the local as well as overall Berry
phases can be combined to achieve maximum control on fl exibly regulating the magnitude and direction of Berry-phase photovoltage.
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DOI: http://dx.doi.org/10.70711/frim.v3i11.7650
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