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Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Published on: April 4, 2017

Polarization controllable plasmonic focusing based on nanometer holes.

Xiaoqing Lu¹, Xiangyu Zeng¹, Haoran Lv¹

¹Shandong Provincial Key Laboratory of Optics and Photonic Device & School of Physics and Electronics, Shandong Normal University, Jinan 250014, People's Republic of China.

|December 18, 2019

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Two novel plasmonic lenses utilize phase compensation for precise light focusing. These nanohole array structures offer tunable multi-foci capabilities, advancing integrated optics applications.

Area of Science:

Photonics and Nanotechnology
Optics and Photonics

Background:

Surface plasmon polaritons (SPPs) enable sub-wavelength light manipulation.
Plasmonic lenses offer miniaturization potential for optical systems.

Purpose of the Study:

To propose two novel plasmonic lens designs based on phase compensation.
To investigate their focusing performance and polarization dependence.

Main Methods:

Design and theoretical analysis of nanohole arrays for phase compensation.
Numerical simulations and experimental verification of focusing properties.

Main Results:

Two types of plasmonic lenses with four sets of nanohole arrays were designed.
Phase compensation through separation and rotation achieves desired focal spots.

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First type yields two or four foci; second type offers two controllable foci.

Demonstrated polarization-dependent focusing characteristics.

Conclusions:

The proposed plasmonic lenses exhibit versatile focusing functionalities.
Their tunable multi-foci capabilities are suitable for optical switches and logic devices.
These structures hold promise for advancing integrated optics.