Crystallization of silica opals onto patterned silicon wafer

Jianhui Ye; Rudolf Zentel; Sanna Arpiainen; Jouni Ahopelto; Fredrik Jonsson; Sergei G. Romanov; Clivia Sotomayor Torres

doi:10.1117/12.661660

18 April 2006 Crystallization of silica opals onto patterned silicon wafer

Jianhui Ye, Rudolf Zentel, Sanna Arpiainen, Jouni Ahopelto, Fredrik Jonsson, Sergei G. Romanov, Clivia Sotomayor Torres

Proceedings Volume 6182, Photonic Crystal Materials and Devices III (i.e. V); 61821U (2006) https://doi.org/10.1117/12.661660
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

We report on fabrication of high quality opaline photonic crystals from large silica spheres, self-assembled in hydrophilic trenches of silicon wafers by using a drawing apparatus with a combination of stirring. The achievements here reported comprise a spatial selectivity of opal crystallization without special treatment of the wafer surface, a filling of the trenches up to the top, leading to a spatially uniform film thickness, particularly an absence of cracks within the size of the trenches, and finally a good three-dimensional order of the opal lattice even in trenches with a complex confined geometry, verified using optical measurements. The opal lattice was found to match the pattern precisely in width as well as depth, providing an important step towards applications of opals in integrated optics. The influence of substrate structure on crystallization is also discussed.

Citation Download Citation

Jianhui Ye, Rudolf Zentel, Sanna Arpiainen, Jouni Ahopelto, Fredrik Jonsson, Sergei G. Romanov, and Clivia Sotomayor Torres "Crystallization of silica opals onto patterned silicon wafer", Proc. SPIE 6182, Photonic Crystal Materials and Devices III (i.e. V), 61821U (18 April 2006); https://doi.org/10.1117/12.661660

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KEYWORDS

Crystals

Optical spheres

Silica

Semiconducting wafers

Silicon

Reflectivity

Scanning electron microscopy

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