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Proceedings Paper

Polymeric waveguide biosensors with Bragg gratings
Author(s): Min-Cheol Oh; Kyung-Jo Kim; Jae-Hyun Lee; Kwang-Nak Koh
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Paper Abstract

Biophotonic sensors based on polymer waveguide with Bragg reflection grating are demonstrated in this work. Waveguide Bragg reflectors were designed by using the effective index method and the transmission matrix method. The grating pattern was formed by exposing laser interference pattern on a photoresist. On top of the inverted rib waveguide, the grating was inscribed into the core layer by the O2 plasma etching. In order to perform the bio-molecule detection experiment, a calixarene molecule was self-assembled on top of thin Au film deposited on the waveguide Bragg reflector. To measure the response of the sensor, several PBS solutions with different concentrations of potassium ion from 1 pM to 100 μM were dropped on the sensor surface. The shift of Bragg reflection wavelength was observed from the PBS solution with lowest potassium concentration, 1 pM.

Paper Details

Date Published: 14 September 2006
PDF: 7 pages
Proc. SPIE 6331, Linear and Nonlinear Optics of Organic Materials VI, 63310S (14 September 2006); doi: 10.1117/12.678251
Show Author Affiliations
Min-Cheol Oh, Pusan National Univ. (South Korea)
Kyung-Jo Kim, Pusan National Univ. (South Korea)
Jae-Hyun Lee, Pusan National Univ. (South Korea)
Kwang-Nak Koh, Pusan National Univ. (South Korea)

Published in SPIE Proceedings Vol. 6331:
Linear and Nonlinear Optics of Organic Materials VI
Robert A. Norwood, Editor(s)

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