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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
Published on: September 5, 2017
Plasmonic wave plate based on subwavelength nanoslits
Eng Huat Khoo1, Er Ping Li, Kenneth B Crozier
1School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA. khooeh@ihpc.a-star.edu.sg
Optics Letters
|July 5, 2011
Summary
We developed a novel plasmonic nanoslit wave plate that efficiently converts light polarization. This thin, subwavelength device accurately shifts light phase by λ/4, enabling linear-to-circular light conversion.
Area of Science:
- Optics and Photonics
- Plasmonics
- Nanotechnology
Background:
- Wave plates are crucial optical components for manipulating light polarization.
- Traditional wave plates can be bulky and difficult to integrate into miniaturized optical systems.
Purpose of the Study:
- To propose and analyze a novel quarter-wave plate based on perpendicular nanoslits.
- To demonstrate the device's ability to convert linear polarization to circular polarization and vice versa.
Main Methods:
- Fabrication of a plasmonic wave plate using nanoslits.
- Theoretical analysis using a semianalytical model.
- Numerical simulations using the finite difference time domain (FDTD) method.
Main Results:
- The proposed device consists of two perpendicular nanoslits with a phase difference of λ/4.
- The plasmonic nanoslit wave plate exhibits a thin profile and subwavelength lateral dimensions.
- Semianalytical predictions for phase shift show excellent agreement with FDTD simulations.
Conclusions:
- The nanoslit-based wave plate is a viable and efficient component for polarization control.
- The device offers miniaturization potential for integrated optical systems.
- The validated semianalytical model provides a reliable tool for designing such plasmonic devices.
