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Coupled-wave formalism for optical waveguiding by transverse Bragg reflection.

|November 21, 2007

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A new theory explains optical waveguiding using Bragg reflection, predicting specific channel widths for photonic crystals. This research offers analytic expressions for waveguiding properties.

Area of Science:

Optics and Photonics
Condensed Matter Physics

Background:

Optical waveguiding is crucial for integrated photonics.
Photonic bandgap crystals offer unique light manipulation properties.

Purpose of the Study:

To develop a theoretical formalism for optical waveguiding via Bragg reflection.
To analyze waveguiding in line defects of photonic bandgap crystals.

Main Methods:

Development of a theoretical framework for Bragg reflection waveguiding.
Derivation of analytic expressions for modal profiles, dispersion, and attenuation.
Application of the theory to line defects in photonic bandgap crystals.

Main Results:

Analytic expressions for optical field profiles, dispersion, and attenuation are derived.

Related Experiment Videos

Waveguiding in photonic crystal line defects is analyzed as a specific case.

Quantized allowed widths for the guiding channel are predicted.

Conclusions:

The presented formalism accurately describes optical waveguiding through Bragg reflection.
The theory predicts fundamental properties of waveguiding in photonic crystal defects.
This work provides a basis for designing novel photonic devices.