Mr. Takuji Kotani Profile

Takuji Kotani

at Fukoku Bussan Co Ltd

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Proceedings Article | 5 March 2021 Presentation + Paper

Flexible waveguides composed of PDMS based elastomer by pen-drawing technique for printable optics

K. Nakakubo, H. Inoue, H. Yoshioka, K. Morita, T. Kotani, Y. Oki

Proceedings Volume 11682, 116820J (2021) https://doi.org/10.1117/12.2582700

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Super-PDMS with solvent dispersibility promises flexible PDMS-based waveguides in both the cladding and the core. The PDMS can fabricate a micro ~ submicron scale structure easily like waveguide by wet process, as oppose to conventional PDMS which uses imprinting to create microstructures. The refractive index of the PDMS is about 0.1 higher than that of conventional one. Super PDMS solutions dispersed in 1,2 dichloroethane solvent maintained transparent crystals in spontaneous drying after drawing, even at a high concentration of 15 wt.%. A flexible PDMS waveguide with a conventional PDMS cladding and a super PDMS core propagated light even with a waveguide bend radius of 2.5 mm, which is smaller than the minimum bend radius of a typical optical fiber.

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