Circular Polarized Light Emission in Chiral Inorganic Nanomaterials

Chiral inorganic nanostructures strongly interact with photons changing their polarization state. The resulting circularly polarized light emission (CPLE) has cross‐disciplinary importance for a variety of chemical/biological processes and is essential for development of chiral photonics. However, t...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2023-08, Vol.35 (34), p.e2108431-n/a
Main Authors: Jiang, Shuang, Kotov, Nicholas A.
Format: Article
Language:English
Subjects:
Biological activity
Biosensors
chiral nanostructures
Circular polarization
Information storage
Light emission
Materials science
Microparticles
mirror asymmetry
Nanoclusters
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Perovskites
photonics
Polarized light
scattering
Spintronics
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Summary:Chiral inorganic nanostructures strongly interact with photons changing their polarization state. The resulting circularly polarized light emission (CPLE) has cross‐disciplinary importance for a variety of chemical/biological processes and is essential for development of chiral photonics. However, the polarization effects are often complex and their interpretation is dependent on the several structural parameters of the chiral nanostructure. CPLE in nanostructured media has multiple origins and several optical effects are typically convoluted into a single output. Analyzing CPLE data obtained for nanoclusters, nanoparticles, nanoassemblies, and nanocomposites from metals, chalcogenides, perovskite, and other nanostructures, it is shown here that there are several distinct groups of nanomaterials for which CPLE is dominated either by circularly polarized luminescence (CPL) or circularly polarized scattering (CPS); there are also many nanomaterials for which they are comparable. The following points are also demonstrated: 1) CPL and CPS contributions involve light−matter interactions at different structural levels; 2) contribution from CPS is especially strong for nanostructured microparticles, nanoassemblies, and composites; and 3) engineering of materials with strongly polarized light emission requires synergistic implementation of CPL and CPS effects. These findings are expected to guide development of CPLE materials in a variety of technological fields, including 3D displays, information storage, biosensors, optical spintronics, and biological probes. The circularly polarized light emission (CPLE) of chiral nanomaterials has cross‐disciplinary importance for fundamental sciences and technologies. Two size‐ and organization‐dependent contributions to CPLE are analyzed: circularly polarized luminescenceand circularly polarized scattering. Synergistic integration of luminescence and scattering outputs allows for high spectral purity and strong polarization rotation, which is demonstrated for inorganic nanomaterials with multiscale chirality.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.202108431