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Near-Field Topology-Optimized Superchiral Metasurfaces for Enhanced Chiral Sensing.

Zhongjun Jiang¹, Soyaib H Sohag¹, You Zhou¹

¹Department of Physics and Optical Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States.

|January 16, 2026

Summary

This summary is machine-generated.

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Researchers developed an inverse design framework to optimize nanophotonic platforms for enhanced chiral detection. This method achieves significant chiral enhancement and precise hotspot placement for sensitive enantioselective analysis.

Area of Science:

Photonics
Chirality
Nanotechnology

Background:

Chiral detection is crucial for pharmaceuticals and biology.
Current nanophotonic chiral sensing has limitations in enhancement and control.

Purpose of the Study:

To introduce an inverse design framework for optimizing superchiral near fields in nanostructures.
To enable enhanced enantioselective analysis and chiral sensing.

Main Methods:

Utilizing an inverse design framework to optimize freeform achiral metasurfaces.
Achieving customized chiral hotspot placement within nanostructures.

Main Results:

An 820-fold chiral density enhancement was achieved.
Ultrasensitive detection of chiral analytes and quantitative readout of enantiomeric excess were demonstrated.

Keywords:

chiral sensing circular dichroism metasurfaces superchiral field topology optimization

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Conclusions:

The framework enables precise control over superchiral fields for advanced chiral sensing.
This approach is compatible with various spin-based photonic materials for applications in valleytronics and topological photonics.