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Updated: Jun 7, 2026
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Chiral emission from chirotopic nanostructures
Yawei Wu1,2, Zhenyu Wang1, Zihan Wu1
1Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, China.
Nature Communications
|June 5, 2026
Summary
Researchers relaxed design constraints for chiral photonics by using local chirality in achiral materials, known as chirotopicity. This enables enhanced light emission from nanoparticles and dyes, validating a 50-year-old concept.
Area of Science:
- Photonics
- Materials Science
- Physical Chemistry
Background:
- Chiral photon emission typically requires mirror asymmetry in materials, limiting dichroic material design.
- The concept of chirotopicity, or local chirality in achiral materials, was hypothesized but lacked experimental validation for optical effects.
Purpose of the Study:
- To demonstrate that chirotopicity can relax symmetry restrictions in chiral photonics.
- To show that photonic nanostructures can enhance and localize chirotopic fields.
- To investigate the emission of light from achiral luminophores within these fields.
Main Methods:
- Utilizing photonic nanostructures to create and control local chirotopic fields.
- Engulfing achiral luminophores within these engineered chirotopic fields.
- Measuring luminescence dissymmetry factors of the emitted light.
Main Results:
- Achiral materials, when structured, can exhibit local chirality (chirotopicity).
- Photonic nanostructures localized and enhanced left- and right-handed chirotopic fields.
- Achiral luminophores emitted intense, highly elliptic light with dissymmetry factors up to 1.65 and -1.58.
Conclusions:
- The study validates the concept of chirotopicity for optical applications.
- Chirotopicity enables the design of novel chiral photonic devices without traditional symmetry constraints.
- This approach offers a new pathway for controlling light-matter interactions in chiral photonics.
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