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Updated: Aug 28, 2025
07:03
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
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Chiral Rashba Ferroelectrics for Circularly Polarized Light Detection
Chang-Chun Fan1, Xiang-Bin Han1, Bei-Dou Liang1
1Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, 211189, China.
Advanced Materials (Deerfield Beach, Fla.)
|September 21, 2022
Summary
Researchers developed 2D chiral perovskite ferroelectrics for enhanced direct detection of circularly polarized light (CPL). These materials show improved CPL distinguishability, paving the way for advanced chiroptics and spintronics applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Optoelectronics
Background:
- Direct detection of circularly polarized light (CPL) is difficult due to material limitations and unclear structure-property links, hindering light helicity discrimination.
- Perovskite ferroelectric semiconductors offer a promising avenue for CPL detection by integrating chirality.
Purpose of the Study:
- To develop and investigate 2D chiral perovskite ferroelectrics for enhanced direct CPL detection.
- To elucidate the interplay of lattice, photon, charge, spin, and orbit in improving CPL detection performance.
Main Methods:
- Fabrication and characterization of 2D chiral perovskite ferroelectric devices.
- Utilizing the bulk photovoltaic effect for switchable, self-powered CPL detection.
- Employing density functional theory (DFT) calculations and circularly polarized light-excited photoluminescence (CPL-PL) measurements.
Main Results:
- A pair of 2D chiral perovskite ferroelectrics demonstrated enhanced CPL detection with an asymmetric factor of 0.20 at 430 nm, doubling the performance of pure chiral counterparts.
- The chirality-transfer-induced chiral-polar ferroelectric phase enhanced photoactive sublattice asymmetry.
- The enhanced performance is attributed to the Rashba-Dresselhaus effect, stemming from bulk inversion asymmetry and strong spin-orbit coupling, evidenced by a large Rashba coefficient.
Conclusions:
- The developed 2D chiral perovskite ferroelectrics show significant potential for direct CPL detection.
- These findings offer new insights into chiral Rashba ferroelectric semiconductors for chiroptics and spintronics.
- The study highlights the importance of interplay between material properties and light interaction for advanced optoelectronic devices.
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