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Related Concept Videos

Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
Chirality in Nature02:30

Chirality in Nature

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. The...

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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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Reconfigurable ferroelectric chiral nanostructures enable fast-switchable optical spatial differentiation.

Wen Chen1, Dong Zhu1, Su-Nan Chen1

  • 1National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.

Light, Science & Applications
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

A novel reconfigurable ferroelectric nanostructure enables dynamic optical spatial differentiation. This fast-switching technology offers reconfigurable control for applications in microscopy and artificial intelligence.

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Area of Science:

  • Photonics and Nanotechnology
  • Computational Imaging

Background:

  • Analog spatial differentiation is a key computational paradigm.
  • Optical methods offer high speed and low power for tasks like data compression and computer vision.
  • Existing optical differentiators are typically static, lacking reconfigurable functions.

Purpose of the Study:

  • To propose and demonstrate a reconfigurable space-variant ferroelectric chiral nanostructure.
  • To enable dynamic control over optical differentiation functions.
  • To achieve ultra-short response times for optical differentiation.

Main Methods:

  • Fabrication of a reconfigurable space-variant ferroelectric chiral nanostructure.
  • Utilizing external electric field polarity switching to control differentiation.
  • Testing the nanostructure for 1st-order/2nd-order spatial differentiation and bright-field imaging.

Main Results:

  • Achieved active selection of differentiation orders and imaging with response times as low as 62 μs.
  • Successfully identified edges of biological cells and intensity objects.
  • Demonstrated high reliability and reversibility over 1.8 million cycles and 200 days.

Conclusions:

  • The proposed ferroelectric nanostructure offers dynamic and reconfigurable optical spatial differentiation.
  • This technology shows potential for applications in neuromorphic photonics, biomedical microscopy, and artificial intelligence.
  • Advances in ferroelectric nanostructure design are highlighted.