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Chirality

Chirality

Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...

Chirality in Nature

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Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.

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Updated: Oct 2, 2025

Fabricating Metamaterials Using the Fiber Drawing Method

Fabricating Metamaterials Using the Fiber Drawing Method

Published on: October 18, 2012

Terahertz Chiral Metamaterials Enabled by Textile Manufacturing.

Peng Wang^1,2, Rui Hu^1,2, Xiaotian Huang^1,2

¹Hubei Engineering and Technology Research Center for Functional Fiber Fabrication and Testing, Wuhan Textile University, Wuhan, 430200, China.

Advanced Materials (Deerfield Beach, Fla.)

|February 26, 2022

Summary

Researchers developed inexpensive microstructures for terahertz (THz) polarization control using textile manufacturing. This novel approach leverages yarn twisting to create chiral metamaterials with strong chiroptical responses for THz wave photonics.

Keywords:

chirality metamaterials terahertz textile manufacturing

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Last Updated: Oct 2, 2025

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Area of Science:

Photonics and Metamaterials
Terahertz (THz) Wave Technology
Materials Science

Background:

Developing effective terahertz (THz) polarization components is crucial for THz wave photonics.
Existing THz polarization devices often require complex, micrometer-scale fabrication techniques.
Natural materials lack strong interactions with THz radiation, hindering device development.

Purpose of the Study:

To demonstrate a novel, easily fabricated chiral metamaterial for THz polarization control.
To explore the use of textile manufacturing for creating THz metadevices.
To achieve strong chiroptical responses at THz frequencies.

Main Methods:

A two-step textile manufacturing approach was employed.
Microhelical strings were created through yarn twisting.
Chiral metamaterials were fabricated using these microstructures.

Main Results:

Chiral metamaterials exhibiting strong chiroptical responses at THz frequencies were successfully fabricated.
Chiral-selective transmission and pronounced optical activity were experimentally verified.
The THz properties originated directly from the yarn-twisting enabled microhelical strings.

Conclusions:

Textile manufacturing offers a scalable and cost-effective method for creating THz metamaterials.
This approach bypasses the need for traditional microfabrication techniques for THz polarization control.
The integration of meta-atom design and textile technology promises new metadevices for comprehensive THz radiation manipulation.