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15 March 2016 Multi-parameter optimization of monolithic high-index contrast grating reflectors
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Proceedings Volume 9757, High Contrast Metastructures V; 97570D (2016)
Event: SPIE OPTO, 2016, San Francisco, California, United States
Conventional High-index Contrast Gratings (HCG) consist of periodically distributed high refractive index stripes surrounded by low index media. Practically, such low/high index stack can be fabricated in several ways however low refractive index layers are electrical insulators of poor thermal conductivities. Monolithic High-index Contrast Gratings (MHCGs) overcome those limitations since they can be implemented in any material with a real refractive index larger than 1.75 without the need of the combination of low and high refractive index materials. The freedom of use of various materials allows to provide more efficient current injection and better heat flow through the mirror, in contrary to the conventional HCGs. MHCGs can simplify the construction of VCSELs, reducing their epitaxial design to monolithic wafer with carrier confinement and active region inside and etched stripes on both surfaces in post processing. We present numerical analysis of MHCGs using a three-dimensional, fully vectorial optical model. We investigate possible designs of MHCGs using multidimensional optimization of grating parameters for different refractive indices.
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Magdalena Marciniak, Marcin Gebski, Maciej Dems, Michał Wasiak, and Tomasz Czyszanowski "Multi-parameter optimization of monolithic high-index contrast grating reflectors", Proc. SPIE 9757, High Contrast Metastructures V, 97570D (15 March 2016);

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