Related Experiment Video
Updated: Mar 15, 2026
11:10
Fabrication and Operation of a Nano-Optical Conveyor Belt
Published on: August 26, 2015
12.1K
Near-field focus steering along arbitrary trajectory via multi-lined distributed nanoslits
Gun-Yeal Lee1, Seung-Yeol Lee1, Hansik Yun1
1National Creative Research Center for Active Plasmonics Application Systems, Inter-University Semiconductor Research Center and School of Electrical and Computer Engineering, Seoul National University, Gwanak-Gu Gwanakro 1, Seoul 08826, Korea.
Scientific Reports
|September 14, 2016
Summary
Researchers developed a tunable plasmonic lens to steer surface plasmon polariton (SPP) signals. This innovation allows continuous control of light foci by adjusting polarization, advancing nano-scale optical device development.
Area of Science:
- * Nanophotonics and Plasmonics
- * Optical Engineering
- * Materials Science
Background:
- * Growing demand for nano-scale optical devices that surpass the diffraction limit.
- * Interest in modulating near-field signals for advanced applications.
- * Limitations in current methods for controlling plasmonic foci.
Purpose of the Study:
- * To propose and demonstrate a novel tunable plasmonic lens.
- * To enable continuous steering of surface plasmon polariton (SPP) foci.
- * To introduce a new method for manipulating near-field signals.
Main Methods:
- * Design of a multi-lined nanoslit array structure.
- * Tilting individual nanoslit arrays to achieve polarization sensitivity.
- * Adjusting nanoslit size to balance SPP amplitudes.
- * Tuning SPP focal length by altering incident polarization state.
Main Results:
- * Demonstrated continuous tunability of plasmonic foci.
- * Achieved smooth variation of SPP focal points with incident linear polarization.
- * Enabled polarization-controlled steering of SPP signals.
- * Provided a novel degree of freedom in near-field multiplexing.
Conclusions:
- * The proposed tunable plasmonic lens offers unprecedented control over SPP signals.
- * This technology facilitates active SPP modulation for various nano-devices.
- * Potential applications include near-field imaging, optical tweezing, and integrated nano-optics.
