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Graphene based resonance structure to enhance the optical pressure between two planar surfaces
Optics Express
|February 3, 2016
Summary
This study developed a novel graphene-based resonance structure to significantly boost optical pressure for dielectric samples. The optimized design achieved over a five-fold increase in optical pressure, enabling advanced optical applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Enhancing optical pressure is crucial for applications like optical tweezers and sensing.
- Conventional resonance structures have limitations in achieving high optical forces.
Purpose of the Study:
- To theoretically analyze and optimize a graphene-based resonance structure for enhanced optical pressure.
- To investigate the impact of material properties and thicknesses on optical pressure.
Main Methods:
- Numerical simulations were performed to analyze a resonance structure comprising graphene layers, a metal film, and MgF2 on a high-index prism.
- Optimization of graphene layers, metal film thickness, and MgF2 layer thickness was conducted.
- The influence of different metals and sample thicknesses was numerically investigated.
Main Results:
- Optical pressure increased by more than five orders of magnitude compared to conventional structures.
- The highest optical pressure was achieved with 10 graphene layers on a 29-nm gold film and 650 nm MgF2 at 633nm wavelength.
- The structure demonstrated significant potential for enhancing optical forces.
Conclusions:
- The proposed graphene-based resonance structure offers a substantial enhancement in optical pressure.
- This advancement opens new avenues for optical tweezers, nanomechanical devices, and surface plasmon-based sensing and imaging.
