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Anisotropic Photonic Microobjects with Dual Stopbands Formed from Single Photonic Dispersion and Their Application
Penghui Li1, Yuandu Hu1,2,3,4, Zhenzhong Yang4
1Department of Materials Science and Engineering, School of Physics Science and Engineering, Beijing Jiaotong University, Beijing 100044, China.
ACS Applied Materials & Interfaces
|February 25, 2025
Summary
Researchers developed a simpler method to create Janus photonic microobjects with dual stopbands using microfluidics. This technique allows for precise control and functionalization, enabling applications in display and anticounterfeiting technologies.
Area of Science:
- Photonics
- Microfluidics
- Materials Science
Background:
- Janus photonic microobjects possess anisotropic shapes and tunable optical properties, making them valuable for various applications.
- Traditional fabrication methods for these microobjects are complex and time-consuming.
Purpose of the Study:
- To propose an easy and effective method for fabricating Janus photonic microobjects with dual stopbands.
- To enable the creation of microobjects from a single stream of photonic components.
Main Methods:
- Utilizing a microfluidic device to create bullet-like, single-stopband photonic microobjects via microchannel confinement.
- Regulating microobject size and shape by adjusting the continuous phase flow rate.
- Selectively etching one region of the microobject after protecting another with polystyrene (PS) film or silicone tubing.
Main Results:
- Successfully fabricated Janus photonic microobjects with dual stopbands.
- Demonstrated precise control over the protection and etching positions, allowing for varied segmental combinations.
- Observed a porous structure in the etched region, suitable for further functionalization (e.g., fluorescence).
Conclusions:
- The developed microfluidic approach simplifies the fabrication of Janus photonic microobjects.
- The resulting microobjects exhibit strong information-encoding capabilities.
- These microobjects show promise for applications in advanced displays and anticounterfeiting measures.
