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Gold cauldrons as efficient candidates for plasmonic tweezers
Mohammad Ali Khosravi1, Abolfazl Aqhili1, Shoaib Vasini2
1Nano Plasmo-Photonic Research Group, Faculty of ECE, Tarbiat Modares University, Tehran, 14115-111, Iran.
Scientific Reports
|November 10, 2020
Summary
Gold cauldrons act as efficient plasmonic tweezers, trapping particles with localized fields. Their clustered arrangement significantly enhances optical trap stiffness for advanced optophoresis applications.
Area of Science:
- Nanophotonics
- Plasmonics
- Optical Tweezers
Background:
- Plasmonic tweezers offer precise particle manipulation.
- High field localization is crucial for efficient trapping.
- Gold nanostructures are promising for plasmonic applications.
Purpose of the Study:
- To investigate gold cauldrons as plasmonic tweezers.
- To analyze the trapping capabilities of single and clustered gold cauldrons.
- To evaluate their potential in lab-on-a-chip optophoresis.
Main Methods:
- Simulations of plasmon-induced optical trap stiffness.
- Experimental investigation using conventional optical tweezers.
- Analysis of field localization and plasmonic forces.
Main Results:
- Gold cauldrons demonstrate high field localization and efficient particle trapping.
- Localized plasmonic fields enhance optical trap stiffness.
- Clustered cauldrons show pronounced additive plasmonic effects and direct tweezing.
Conclusions:
- Gold cauldrons are effective plasmonic tweezers, especially in clusters.
- They offer enhanced trap stiffness and direct plasmonic tweezing.
- Their low-cost fabrication makes them suitable for optophoresis.
