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Enhancement of surface second harmonic generation with waveguides.

H A Haus, G A Reider

|June 5, 2010

Summary

This study introduces a novel waveguide structure capable of boosting second harmonic generation by five orders of magnitude. The design utilizes a grating for phase matching, potentially manufactured in doped quartz for enhanced nonlinear optical applications.

Area of Science:

Nonlinear Optics
Materials Science
Photonics

Background:

Second harmonic generation (SHG) is a key nonlinear optical process for frequency conversion.
Enhancing SHG efficiency in thin films and surface layers remains a significant challenge.
Waveguide structures offer potential for improved light confinement and interaction length.

Purpose of the Study:

To propose and theoretically investigate a novel waveguide structure for significantly enhancing second harmonic generation.
To achieve efficient phase matching for SHG within the waveguide.
To explore material possibilities for fabricating the proposed waveguide.

Main Methods:

Proposal of a waveguide structure incorporating a grating for phase matching.
Analysis of the waveguide's capability to enhance second harmonic generation.

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Consideration of material fabrication, specifically doped quartz.

Main Results:

The proposed waveguide structure demonstrates the potential to enhance second harmonic generation by up to 5 orders of magnitude.
Phase matching is effectively achieved through the integrated grating structure.
The waveguide material can be fabricated from doped quartz.

Conclusions:

The developed waveguide structure offers a promising route to dramatically improve nonlinear optical frequency conversion efficiency.
Grating-assisted phase matching is a viable strategy for enhancing SHG in waveguide devices.
Doped quartz presents a feasible material for the fabrication of these high-performance nonlinear optical waveguides.