Dynamic optical chirality based on liquid-crystal-embedded nano-cilia photonic structures

Area of Science:

• Photonics
• Materials Science
• Nanotechnology

Background:

• Artificial chiral photonic structures exhibit stronger chiroptical responses than natural chiral molecules.
• Current chiral structures typically have fixed optical properties post-fabrication, limiting dynamic applications.

Purpose of the Study:

• To develop an active optical chirality strategy for dynamic chiroptical responses.
• To create a tunable chiroptical metalens for controlling circularly polarized light.

Main Methods:

• Fabrication of a dual chiral framework using nano-kirigami and self-organization.
• Integration of cilia structures and cholesteric liquid crystal (LC).

Main Results:

• Achieved dynamic and wide-ranging chiroptical responses at the nanoscale.
• Demonstrated amplification, elimination, and reversal of circular dichroism.
• Constructed a thermally tunable chiroptical metalens with a focusing switch for circularly polarized light.

Conclusions:

• The proposed cilia-LC framework offers a novel approach to active optical chirality.
• This technique enables dynamic control over chiroptical properties with potential in imaging, encryption, displays, and sensors.