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A multi-layer vertically stacked all sol-gel fabrication technique on bulk silicon is proposed to realize vertical coupling from planar waveguides to 3-dimensional structures. The all sol-gel fabricat...ion technique realizes the capability to stack ZnO sol-gel core layer and SiO_2 sol-gel cladding and core separation layers. A major issue with sol-gel based fabrication is the appearance of cracks on the sol-gel layer, and these were improved by a slow cooling process of 1°C/min after 500°C temperature annealing in addition to a SiO_2 surface cleaning using photoresist remover. As a result, a multi-layer vertically stacked structure with a ZnO core layer thickness of 300 nm and SiO_2 cladding/core separation layer thickness of 1.5 μm was successfully fabricated on bulk Si.続きを見る
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Mendeley出力
