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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.
Min-Cheol Oh,Kyung-Jo Kim,Jae-Hyun Lee, andKwang-Nak Koh
"Polymer waveguide biosensors with Bragg gratings", Proc. SPIE 6331, Linear and Nonlinear Optics of Organic Materials VI, 63310S (14 September 2006); https://doi.org/10.1117/12.678251
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Min-Cheol Oh, Kyung-Jo Kim, Jae-Hyun Lee, Kwang-Nak Koh, "Polymeric waveguide biosensors with Bragg gratings," Proc. SPIE 6331, Linear and Nonlinear Optics of Organic Materials VI, 63310S (14 September 2006); https://doi.org/10.1117/12.678251