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Published on: September 2, 2017
Lithographically-featured photonic microparticles of colloidal assemblies
Su Yeon Lee1, Shin-Hyun Kim, Chul-Joon Heo
1National Creative Research Initiative Center for Integrated Optofluidic Systems and Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305-701, Korea.
Physical Chemistry Chemical Physics : PCCP
|August 10, 2010
Summary
Researchers developed a novel method to create composite and porous photonic crystal microparticles using self-assembly and photolithography. This technique allows for tunable photonic bandgaps in microparticles for advanced optical applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Photonic crystal microparticles offer unique optical properties.
- Fabricating complex microparticle structures remains challenging.
Purpose of the Study:
- To present a new strategy for fabricating composite and porous photonic crystal microparticles.
- To demonstrate control over photonic bandgap properties.
Main Methods:
- Combined colloidal self-assembly with photolithography for microparticle fabrication.
- Utilized silica/SU-8 composite structures and controlled embedding above glass transition temperature.
- Created porous microparticles by dissolving silica, and bilayered structures for dual bandgaps.
Main Results:
- Successfully fabricated silica/SU-8 composite microparticles with tunable photonic bandgaps.
- Achieved enhanced reflectivity in porous microparticles due to high refractive index contrast.
- Demonstrated the ability to create bilayered microparticles with two distinct photonic bandgaps.
Conclusions:
- The developed strategy is promising for creating advanced photonic crystal microparticles.
- Tunable bandgaps and enhanced reflectivity open possibilities for optical devices.
- The method allows for precise control over microparticle structure and optical properties.
