2020/06/10 by Shan Zhu, Yanyan Cao, Yangyang Fu +4
Engineering · Materials Science · Physics and Astronomy · #Absorption (acoustics) #Advanced Antenna and Metasurface Technologies #Bifunctional #Metamaterials and Metasurfaces Applications #Plasmonic and Surface Plasmon Research #Reconfigurability #Retroreflector #Scattering #Terahertz radiation #Vanadium dioxide #Wavefront #physics.app-ph #physics.optics
paper · pdf · doi:10.1364/ol.394164
Accepted by Optics Letters
openalex publication_date 2020/06/10 · arxiv created 2020/06/18 · openalex created_date 2020/06/25 · arxiv updated 2020/08/26 · openalex updated_date 2026/08/05
Here we make use of vanadium dioxide ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">V</mml:mi> <mml:mi mathvariant="normal">O</mml:mi> </mml:mrow> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> </mml:math> ) to design a bifunctional metasurface working at the same targeted frequency. With the increase of temperature, the functionality of the designed metasurface can switch from a multichannel retroreflector to a perfect absorber, caused by the phase transition of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">V</mml:mi> <mml:mi mathvariant="normal">O</mml:mi> </mml:mrow> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> </mml:math> from insulator to conductor. Different from traditional bifunctional metasurfaces designed by simple composition of two functionalities, our proposed bifunctional metasurface is based on the interaction between two functionalities. The device shows good potential for the combination of wavefront manipulation and optical absorption, therefore providing a promising approach for switchable detection and antidetection devices.