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Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

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Second-order parametric interactions in 1-D photonic-crystal microcavity structures.

Mohammed F Saleh¹, Luca Dal Negro, Bahaa E Saleh

¹Department of Electrical and Computer Engineering, Boston University, Boston, MA 02215, USA. mohsaleh@bu.edu

|June 11, 2008

Summary

We developed a generalized model for photonic structures, revealing enhanced nonlinear interactions and an exponential dependence of second harmonic generation efficiency on layer count. This model also suggests optical parametric amplification devices can function as optical switches.

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Area of Science:

Photonics
Nonlinear Optics
Materials Science

Background:

Second-order parametric interactions are crucial for nonlinear optical devices.
Photonic-crystal microcavity (PCM) structures offer unique light confinement properties.
Understanding wave behavior and pump depletion is essential for device optimization.

Purpose of the Study:

To develop a generalized model for studying second-order parametric interactions in 1-D multilayered photonic structures.
To assess the performance of parametric devices within PCM structures.
To investigate the influence of wave localization and pump depletion on nonlinear interactions.

Main Methods:

Development of a generalized theoretical model.
Inclusion of collinear oblique waves and partial pump depletion in the model.
Analysis of wave localization effects in multilayered photonic structures.
Assessment of parametric device performance in PCM structures.

Main Results:

Dramatic enhancement of nonlinear interactions observed at localized wave frequencies.
Demonstration of exponential dependence of second harmonic generation (SHG) conversion efficiency on the number of layers.
Resonance-like dependence of optical parametric amplification (OPA) gain on pump intensity.
Identification of potential for OPA devices to function as optical switches due to gain behavior.

Conclusions:

The developed model accurately predicts enhanced nonlinear phenomena in multilayered photonic structures.
Wave localization significantly boosts nonlinear interaction efficiency.
The observed gain behavior in OPA suggests a novel application as an optical switch.
The findings provide insights for designing advanced photonic devices with tailored nonlinear responses.