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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Time-explicit simulation of wave interaction in optical waveguide crossings at large angles.

S T Chu, S K Chaudhuri, J W Lit

|August 12, 2010

Summary

This study simulates wave interactions in optical waveguide crossings using the finite-difference time-domain method. It reveals power distribution and flow, offering insights into switching behavior and radiation origins.

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Area of Science:

Photonics and Wave Optics
Computational Electromagnetics

Background:

Optical waveguide crossings are fundamental components in integrated photonic circuits.
Understanding wave propagation and power distribution at large crossing angles is crucial for device design and performance.

Purpose of the Study:

To simulate and analyze wave interaction in optical waveguide crossings at large angles.
To investigate power distribution characteristics and flow dynamics within these structures.
To gain insights into the switching behavior and radiation mechanisms.

Main Methods:

Utilized the time-explicit finite-difference time-domain (FDTD) method.
Simulated wave propagation by time stepping discretized Maxwell's curl equations.
Extracted guided-mode amplitudes from total field data to determine power distribution.

Main Results:

Obtained detailed power distribution characteristics at large-angle optical waveguide crossings.
Visualized the physical picture of power flow within the intersection.
Identified the origins of radiation and analyzed switching behavior.

Conclusions:

The FDTD method effectively simulates complex wave interactions in waveguide crossings.
The analysis provides valuable insights into the physics governing power transfer and loss mechanisms.
Results aid in the design of efficient and high-performance optical switching devices.