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Updated: May 24, 2025

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Ferroelectric Tunable Nonvolatile Polarization Detection Based on 2H α-In2Se3
Tengzhang Liu1,2, Xin Huang2,3, Zhuoxuan Han2
1State Key Laboratory of Radio Frequency Heterogeneous Integration, College of Electronics and Information Engineering, Shenzhen University, Shenzhen 518060, China.
This study introduces a tunable polarization photodetector using 2H α-In2Se3. The ferroelectric semiconductor field-effect transistor (FeS-FET) offers nonvolatile polarization modulation for enhanced light detection capabilities.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Two-dimensional (2D) materials offer unique properties for polarization photodetectors.
- Current photodetectors lack polarization tunability, limiting device versatility.
Purpose of the Study:
- To explore a nonvolatile ferroelectric tunable polarization photodetector based on 2H α-In2Se3.
- To demonstrate ferroelectric modulation of polarization sensitivity.
Main Methods:
- Fabrication of 2H α-In2Se3 ferroelectric semiconductor field-effect transistors (FeS-FETs).
- Investigation of ferroelectric modulation of photoelectric response under 650 nm illumination.
Main Results:
- Achieved an on/off ratio of 10^3 for the FeS-FET.
- Demonstrated a maximum optical responsivity of 75 A/W and detectivity of 1.46 × 10^10 jones.
- Tuned dichroic ratios from 1.74 to 3 via ferroelectric polarization switching, with linear tunability observed.
Conclusions:
- 2H α-In2Se3 is a promising material for polarization detection.
- Nonvolatile ferroelectric modulation offers a new approach for tunable polarization photodetectors.
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