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Circular dichroism of a tilted U-shaped nanostructure
Optics Letters
|July 15, 2017
Summary
Researchers developed a novel tilted U-shaped nanostructure (TUSN) for enhanced circular dichroism (CD) signals. This cost-effective fabrication method simplifies creating tilted nanostructures for sensing applications.
Area of Science:
- Plasmonic sensing
- Analytical chemistry
- Biological detection
Background:
- Circular dichroism (CD) is crucial for biological detection, analytical chemistry, and plasmonic sensing.
- Tilted 3D nanostructures can generate CD signals, but their fabrication is challenging and costly.
Purpose of the Study:
- To develop a cost-effective method for fabricating tilted nanostructures.
- To investigate the mechanism behind enhanced CD signals in tilted nanostructures.
Main Methods:
- Fabrication of a tilted U-shaped nanostructure (TUSN) on a polystyrene (PS) nanosphere using glancing angle deposition.
- Utilizing a SiO2 sheet to tilt one branch of the U-shaped nanostructure.
Main Results:
- Successful fabrication of TUSN on PS nanospheres.
- Demonstrated enhancement of CD signals with increasing SiO2 sheet thickness due to increased phase difference.
Conclusions:
- The study presents a viable method for fabricating tilted nanostructures.
- The findings elucidate the mechanism of CD signal enhancement in TUSN, paving the way for future research.
