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Related Experiment Video

Updated: Jun 3, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

Bidirectional surface wave splitters excited by a cylindrical wire.

Yong Jin Zhou¹, Quan Jiang, Tie Jun Cui

¹State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing, 210096, China.

|March 30, 2011

Summary

This summary is machine-generated.

Researchers developed novel bidirectional surface wave splitters using a cylindrical wire and grating structures. These devices efficiently guide electromagnetic waves in opposite directions at microwave and terahertz frequencies, validated by simulations and experiments.

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Area of Science:

Electromagnetics and Wave Propagation
Metamaterials and Nanophotonics

Background:

Surface waves offer efficient waveguiding but controlling their directionality is challenging.
Existing bidirectional splitters often rely on complex structures or subwavelength slits.

Purpose of the Study:

To propose and validate a novel bidirectional surface wave splitter design.
To introduce a new coupling mechanism between a cylindrical wire and surface gratings.
To demonstrate the splitter's functionality at both microwave and terahertz frequencies.

Main Methods:

Design and fabrication of bidirectional surface wave splitters.
Utilizing a cylindrical wire as the excitation source.
Employing surface gratings with tailored depths for wave confinement and direction control.
Modeling using the finite integral time-domain method.
Experimental verification at microwave frequencies.

Main Results:

The proposed splitter effectively guides electromagnetic waves in opposite directions.
Experimental results closely match simulation predictions for microwave frequencies.
The design is successfully extended and modeled for terahertz frequencies, confirming its validity.

Conclusions:

The novel coupling mechanism enables efficient bidirectional surface wave splitting.
The proposed structure offers a viable solution for directional control of surface waves.
The demonstrated tunability across microwave and terahertz frequencies highlights its versatility.