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Optical design of reflectionless complex media by finite embedded coordinate transformations
Marco Rahm1, Steven A Cummer, David Schurig
1Center for Metamaterials and Integrated Plasmonics, Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA. marco.rahm@duke.edu
Physical Review Letters
|March 21, 2008
Summary
This study introduces finite coordinate transformations for controlling electromagnetic fields, enabling novel devices like reflectionless beam shifters and splitters with unusual wave behavior.
Area of Science:
- Electromagnetism
- Optics
- Materials Science
Background:
- Transformation optics provides a novel method for controlling electromagnetic fields.
- Existing transformation optical structures, like invisibility cloaks, are typically reflectionless and do not disturb transmitted waves.
Purpose of the Study:
- To expand the capabilities of transformation optics by introducing finite, embedded coordinate transformations.
- To design and demonstrate new transformation optical devices that can steer or focus electromagnetic waves.
Main Methods:
- Development of finite, embedded coordinate transformations within transformation optics.
- Application of these transformations to design novel optical devices.
- Verification of device performance using 2D full-wave electromagnetic simulations.
Main Results:
- Demonstration of a parallel beam shifter and a beam splitter utilizing the new transformation method.
- Confirmation that the designed devices are inherently reflectionless.
- Observation of unusual electromagnetic behavior in the designed devices.
Conclusions:
- Finite, embedded coordinate transformations represent a significant expansion of transformation optics.
- This method allows for the creation of reflectionless devices that steer and focus electromagnetic waves.
- The developed devices exhibit unique electromagnetic properties, validated by simulations.
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