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An accurate control of the surface wave using transformation optics
1School of Electronic Engineering and Computer Science. Queen Mary University of London, London E1 4NS, UK.
Optics Express
|April 27, 2012
Summary
This study demonstrates controlling surface waves using transformation optics. The technique guides waves around obstacles and along uneven surfaces without scattering, applicable to higher frequencies and other modes.
Area of Science:
- Electromagnetics and Wave Propagation
- Metamaterials and Transformation Optics
Background:
- Surface waves are crucial for microwave applications but are sensitive to interface irregularities and obstacles.
- Controlling surface wave propagation is essential for designing advanced microwave devices and systems.
Purpose of the Study:
- To investigate and demonstrate effective control of surface waves at microwave frequencies.
- To propose and validate a transformation optics-based technique for manipulating surface wave propagation.
- To analyze surface wave behavior around geometric obstacles and along uneven interfaces.
Main Methods:
- Utilizing transformation optics principles to design field manipulation strategies.
- Analyzing eigenmode properties of surface waves to understand their behavior.
- Simulating and analyzing surface wave propagation along uneven interfaces with triangular obstructions.
- Investigating surface wave circumvention of metallic rhombus-shaped obstacles.
Main Results:
- Surface waves are successfully guided along an uneven interface without scattering into the air.
- Surface waves effectively circumvent a metallic rhombus obstacle without creating a shadow, demonstrating cloaking.
- The proposed transformation optics technique provides accurate field manipulation for surface waves.
Conclusions:
- Transformation optics offers an efficient method for controlling surface waves at microwave frequencies.
- The technique is robust, guiding surface waves around complex obstacles and interfaces.
- This approach is extendable to higher frequencies and other electromagnetic modes.
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