Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 276, Issue -, Pages 62-67Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2018.04.017
Keywords
Goos-Hanchen shift; Bloch surface waves; Optical sensor
Funding
- National Natural Science Foundation of China (NSFC) [61775009, 61505145, 61521091, 61435002, 61205078]
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A novel and simple sensing scheme based on the giant Goos-Hanchen shift enhanced by the excitation of the Bloch surface wave in a truncated one-dimensional photonic crystal structure is proposed and experimentally demonstrated. The significantly enhanced Goos-Hanchen shift is directly measured by a position sensitive detector and the following amplifier. The bulk refractive index sensitivity of the sensor is investigated by utilizing sodium chloride solutions and glycerol solutions with different concentrations as test samples. The results show that the Goos-Hanchen shift sensor has a superior sensitivity of 2.0*10(-9) RIU/nm, which outperforms the SPR enhanced Goos-Hanchen shift sensors. (C) 2018 Elsevier B.V. All rights reserved.
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