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Perfect lens with not so perfect boundaries
P C Ingrey1, K I Hopcraft, O French
1School of Mathematical Sciences, University of Nottingham, University Park, England. pmxpi@nottingham.ac.uk
Optics Letters
|April 3, 2009
Summary
Manufacturing imperfect left-handed media interfaces can be improved. Analytical calculations show diffuse boundaries in perfect lenses create field localizations, affecting evanescent mode recovery and mimicking increased losses.
Area of Science:
- Electromagnetism and Materials Science
- Optics and Photonics
Background:
- Manufacturing left-handed media often results in imperfect interfaces due to unavoidable defects and parameter variations.
- These imperfections can significantly impact the performance of optical devices, particularly those relying on precise wave manipulation.
Purpose of the Study:
- To analytically calculate electromagnetic wave propagation through a perfect lens with diffuse boundaries.
- To investigate the formation of field localizations within these diffuse boundary layers.
- To quantify the lens's ability to recover evanescent modes in the presence of boundary imperfections.
Main Methods:
- Analytical calculation of electromagnetic wave propagation.
- Modeling of diffuse boundaries in a perfect lens.
- Analysis of field localization phenomena.
- Quantification of evanescent mode recovery.
Main Results:
- Field localizations are generated within the diffuse boundary layers of the lens.
- The presence of diffuse boundaries affects the recovery of evanescent modes.
- The diffuse layer's impact is qualitatively similar to a lens exhibiting increased optical losses.
Conclusions:
- Diffuse boundaries in perfect lenses introduce localized fields and degrade evanescent mode recovery.
- The observed effects are analogous to increased losses, highlighting a key challenge in manufacturing such optical components.
- Understanding these phenomena is crucial for designing and fabricating functional left-handed media devices.
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