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Updated: May 9, 2025
10:33
An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
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Enantioselective Se lattices for stable chiroptoelectronic processing media
Junyoung Kwon1,2, Jae Bum Jeon1, Min Gu Lee1
1Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.
Nature Communications
|May 3, 2025
Summary
Atomic chiral selenium nanorod films offer a stable, efficient solution for detecting circularly polarized light (CPL) across a wide spectrum. This breakthrough advances CPL sensing for quantum computing and spintronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Chiroptoelectronic devices are vital for quantum computing, spin optical communications, and magnetic recording.
- Conventional circularly polarized light (CPL)-sensing materials suffer from limited efficiency and low stability, hindering widespread adoption.
- There is a need for advanced materials with enhanced performance and durability for CPL detection.
Purpose of the Study:
- To introduce atomic chiral selenium (Se) nanorod (NR) films as novel broadband CPL detectors.
- To leverage the intrinsic chirality and stability of Se nanocrystals for improved CPL sensing.
- To explore the chiroptical activity of large-area Se NR films using incident circular polarization (ICP)-Raman optical activity (ROA).
Main Methods:
- Fabrication of large-area atomic chiral Se NR films.
- Characterization of CPL detection capabilities across UV to SWIR spectrum.
- Utilizing ICP-Raman optical activity (ROA) mapping to analyze chiroptical properties.
- Assessing the stability of Se NR films under ambient conditions.
Main Results:
- Se NR films demonstrated broadband CPL detection from UV to SWIR.
- Achieved a high responsivity dissymmetry factor of up to 0.4.
- Exhibited excellent stability, maintaining performance for over 13 months under ambient conditions.
- ICP-ROA mapping provided insights into the chiroptical activity of 2D chiral materials.
Conclusions:
- Atomic chiral Se NRs are promising materials for efficient and stable broadband CPL detection.
- These Se NR films have potential applications in chiral photonic synapses, chiral spin devices, and CPL-sensitive photocatalysts.
- ICP-ROA mapping is an effective technique for analyzing 2D chiral materials.
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