Source: OPTICAL MATERIALS EXPRESS Volume: 13  Issue: 5  Pages: 1189-1200  Article Number: 484289  DOI: 10.1364/OME.484289  Published: MAY 1 2023 

 

Abstract: A dynamically reconfigurable metasurface grating is proposed in this work based on the phase change material Ge2Sb2Te5 (GST). The metasurface grating keeps as the 0 degrees polarizer that allows only x-polarized light to pass when the GST is in the crystalline state, and switches to the 90 degrees polarizer (only y-polarized light passes through) while the GST transforms into the amorphous state. Furthermore, the circular polarization dichroism could be achieved using a double-layer metasurface consisting of this dynamic grating and a large broadband plasmonic quarter-wave plate. We can expect to achieve fully polarized detection with the ultra-high spatial resolution using only three components. In addition, we can obtain the largest bandwidth (300 nm) of the full Stokes large-image-element to date in the near infrared band by using the six-image-element technique with the crystalline phase GST. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

 

Accession Number: WOS:000994163300001

 

ISSN: 2159-3930