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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 31,
  • Issue 21,
  • pp. 3374-3380
  • (2013)

Robust Design by Antioptimization for Parameter Tolerant GaAs/AlOx High Contrast Grating Mirror for VCSEL Application

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Abstract

A GaAs/AlO $_x$ high contrast grating structure design which exhibits a 99.5% high reflectivity for a 425 nm large bandwidth is reported. The high contrast grating (HCG) structure has been designed in order to enhance the properties of mid-infrared VCSEL devices by replacing the top Bragg mirror of the cavity. A robust optimization algorithm has been implemented to design the HCG structure not only as an efficient mirror but also as a robust structure against the imperfections of fabrication. The design method presented here can be easily adapted for other HCG applications at different wavelengths.

© 2013 IEEE

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