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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Reflectionless evanescent-wave amplification by two dielectric planar waveguides: erratum.

Mankei Tsang¹, Demetri Psaltis

¹Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125, USA.

|December 15, 2006

Summary

This Erratum corrects previous findings on dielectric slabs. Reflectionless evanescent-wave amplification is achievable under specific conditions in two dielectric planar waveguides.

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Area of Science:

Optics and Photonics
Waveguide Theory

Background:

Previous work suggested zero reflection coefficient for two dielectric slabs at single-waveguide resonance.
This assertion requires correction based on a more rigorous derivation.

Purpose of the Study:

To correct the assertion regarding the reflection coefficient of two dielectric slabs.
To derive the accurate conditions for achieving reflectionless evanescent-wave amplification.

Main Methods:

Revisiting the theoretical derivation for the reflection coefficient of coupled dielectric waveguides.
Analyzing the conditions for resonance in a two-slab waveguide system.

Main Results:

The total reflection coefficient does not approach zero at single-waveguide resonance.
Correct conditions for achieving reflectionless evanescent-wave amplification have been identified.

Conclusions:

The previous conclusion regarding zero reflection was inaccurate.
Reflectionless evanescent-wave amplification is possible in two-dielectric planar waveguides under specific derived conditions.