In this paper we introduce the concept of tunable chiral mirror and provide an experimental evidence of its implementation. A chiral mirror, i.e., a device which reflects circularly polarized light of a single handedness without inverting it, has been synthesized by numerical optimization of a metasurface composed of non-centrosymmetric meta-atoms. Operation has been targeted to the telecommunication wavelength through a judicious rescaling and reshaping of the meta-atom geometry. Embedding an electrochromic material (V2O5) in the layer stack, dynamical reconfiguration of the chiral mirror has been achieved, with a theoretical modulation depth of more than 35 dB. Reconfiguration is self-holding and reversible, showing that electrochromism in V2O5could prove to be a powerful tool to modulate the response of complex beam shaping and polarization handling metasurface-based ultrathin photonic components.
A dynamically tunable chiral mirror enabled by electrochromic metasurfaces operating at telecommunication wavelengths
Zanotto, Simone;Morichetti, Francesco;Melloni, Andrea
2017-01-01
Abstract
In this paper we introduce the concept of tunable chiral mirror and provide an experimental evidence of its implementation. A chiral mirror, i.e., a device which reflects circularly polarized light of a single handedness without inverting it, has been synthesized by numerical optimization of a metasurface composed of non-centrosymmetric meta-atoms. Operation has been targeted to the telecommunication wavelength through a judicious rescaling and reshaping of the meta-atom geometry. Embedding an electrochromic material (V2O5) in the layer stack, dynamical reconfiguration of the chiral mirror has been achieved, with a theoretical modulation depth of more than 35 dB. Reconfiguration is self-holding and reversible, showing that electrochromism in V2O5could prove to be a powerful tool to modulate the response of complex beam shaping and polarization handling metasurface-based ultrathin photonic components.File | Dimensione | Formato | |
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A Dynamically Tunable Chiral Mirror Enabled by electrochromic metasurfaces operating at telecommunication wavelengths.pdf
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