I came across a Fibre Optic SPR sensor used with a phone and I was trying to figure out what thickness they used for their sensing region.
https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-23-13-17179&id=321178
They did not mention the thickness so I went into their references and saw one paper mention that the thickness of the silver coated sensing region on the fibre optic has to be at least 300 nm. Compared to prism SPR its very large probably since we are trying to reflect the signal. But I wanted to be sure about the thickness used for the coating before getting it fabricated.
you can see the following links:
1. https://core.ac.uk/download/pdf/155243792.pdf
2. https://www.proquest.com/docview/2535570650
3. https://d-nb.info/1101347619/34
4. https://www.nature.com/articles/s41598-021-89396-w?proof=t+target%3D
5. Article Gold Thickness Dependence of SPR-Based Hetero-Core Structure...
6. Article Investigation of cladding thicknesses on silver SPR based si...
Grunwald, B., and G. Holst. "Fibre optic refractive index microsensor based on white-light SPR excitation." Sensors and Actuators A: Physical 113, no. 2 (2004): 174-180.
Nirmal Pol
I'd be carefully looking at the patents and patent applications. These often contain vital and useful practical information. For example, the attached. A simple patent search using 'Fibre (or Fiber) Optic SPR sensing' will help.
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