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Monolithic high-index contrast grating: a material independent high-reflectance VCSEL mirror. 2015

M Gębski, and M Dems, and A Szerling, and M Motyka, and L Marona, and R Kruszka, and D Urbańczyk, and M Walczakowski, and N Pałka, and A Wójcik-Jedlińska, and Q J Wang, and D H Zhang, and M Bugajski, and M Wasiak, and T Czyszanowski

In this paper we present an extensive theoretical and numerical analysis of monolithic high-index contrast grating, facilitating simple manufacture of compact mirrors for very broad spectrum of vertical-cavity surface-emitting lasers (VCSELs) emitting from ultraviolet to mid-infrared. We provide the theoretical background explaining the phenomenon of high reflectance in monolithic subwavelength gratings. In addition, by using a three-dimensional, fully vectorial optical model, verified by comparison with the experiment, we investigate the optimal parameters of high-index contrast grating enabling more than 99.99% reflectance in the diversity of photonic materials and in the broad range of wavelengths.

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