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Proceedings Paper

Micromolded U-shaped PDMS optical waveguide for biosensing applications
Author(s): Nirmal Punjabi; Anjali Khatri; Soumyo Mukherji
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Paper Abstract

Integrated optical waveguide sensors are usually fabricated using materials like silicon, silica, SU-8, etc. Their fabrication requires clean room processes which are expensive and time-consuming. We demonstrated the fabrication of PDMS based optical waveguide in non-cleanroom environment using soft lithography technique. A master-mold was fabricated using Acralyn. PDMS polymer was chosen for waveguide fabrication, as it provides low refractive index contrast in the sensing region. These PDMS waveguides were found to be 5-times more sensitive than SU-8 waveguides. High sensitivity along with mechanical robustness and ease of fabrication of PDMS waveguides provides a promising and versatile platform for biosensor application.

Paper Details

Date Published: 15 October 2013
PDF: 4 pages
Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 89241W (15 October 2013); doi: 10.1117/12.2031384
Show Author Affiliations
Nirmal Punjabi, Indian Institute of Technology Bombay (India)
Anjali Khatri, Indian Institute of Technology Bombay (India)
Soumyo Mukherji, Indian Institute of Technology Bombay (India)

Published in SPIE Proceedings Vol. 8924:
Fourth Asia Pacific Optical Sensors Conference
Minghong Yang; Dongning Wang; Yun-Jiang Rao, Editor(s)

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