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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
Multichannel photonic devices based on tristable polymer-stabilized cholesteric textures.
Yu-Cheng Hsiao1, Chien-Tsung Hou, Victor Ya Zyryanov
1Department of Physics, Chung Yuan Christian University, Chung-Li 32023, Taiwan.
Optics Express
|November 24, 2011
Summary
This study presents an electrically tunable photonic device using a hybrid photonic crystal (PC) and polymer-stabilized cholesteric texture (PSCT) structure. The device offers switchable wavelengths and tunable intensity, enabling efficient, polarizer-free optical applications.
Area of Science:
- Photonics
- Materials Science
- Condensed Matter Physics
Background:
- One-dimensional photonic crystals (PCs) offer unique light manipulation properties.
- Polymer-stabilized cholesteric textures (PSCT) exhibit tunable optical characteristics.
- Integrating PCs with PSCT can lead to novel photonic functionalities.
Purpose of the Study:
- To demonstrate an electrically tunable photonic device.
- To utilize a hybrid photonic crystal (PC) and polymer-stabilized cholesteric texture (PSCT) structure.
- To achieve switchable wavelengths and tunable intensity in a defect mode.
Main Methods:
- Fabrication of a one-dimensional photonic crystal (PC) with a polymer-stabilized cholesteric texture (PSCT) defect layer.
- Application of frequency-modulated voltage pulses to control the photonic device.
- Characterization of wavelength switching and intensity tuning capabilities.
Main Results:
- The hybrid PC/PSCT device exhibits electrically switchable defect mode wavelengths among three stable states.
- Optical intensity is tunable across multiple metastable states.
- The device operates without a polarizer and shows optical tristability.
Conclusions:
- An electrically controllable multichannel photonic device with switchable wavelengths and tunable intensity is proposed.
- The device's optical tristability in defect modes can reduce power consumption.
- This technology holds promise for advanced optical applications requiring precise control.
