Perovskite metasurfaces with large superstructural chirality

Guankui Long, Giorgio Adamo, Jingyi Tian, Maciej Klein, Harish N. S. Krishnamoorthy, Elena Feltri, Hebin Wang and Cesare Soci ()
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Guankui Long: Nanyang Technological University
Giorgio Adamo: Nanyang Technological University
Jingyi Tian: Nanyang Technological University
Maciej Klein: Nanyang Technological University
Harish N. S. Krishnamoorthy: Nanyang Technological University
Elena Feltri: Nanyang Technological University
Hebin Wang: Nankai University
Cesare Soci: Nanyang Technological University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Recent attempts to synthesize hybrid perovskites with large chirality have been hampered by large size mismatch and weak interaction between their structure and the wavelength of light. Here we adopt a planar nanostructure design to overcome these limitations and realize all-dielectric perovskite metasurfaces with giant superstructural chirality. We identify a direct spectral correspondence between the near- and the far- field chirality, and tune the electric and magnetic multipole moments of the resonant chiral metamolecules to obtain large anisotropy factor of 0.49 and circular dichroism of 6350 mdeg. Simulations show that larger area metasurfaces could yield even higher optical activity, approaching the theoretical limits. Our results clearly demonstrate the advantages of nanostructrure engineering for the implementation of perovskite chiral photonic, optoelectronic, and spintronic devices.

Date: 2022
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DOI: 10.1038/s41467-022-29253-0

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