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5 March 2021 Highly-scalable fabrication of photonic crystal fiber-tip refractive index sensors
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Abstract
We developed a method to easily transfer optical structures from a semiconductor substrate to a fiber-tip facet without the need for glues and preserving the pristine or functionalized condition of the structure surface. An opening is etched on the back of the fabrication wafer and the structure is suspended via breakable support. The transfer is achieved by mechanical contact with the fiber facet. Using a photonic crystal structure designed for high vertical coupling at the Gamma point a reflectance fiber-tip sensor with refractive index sensitivity of 120 nm/RIU has been assembled and could be further functionalized for application in biosensing.
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© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Luca Picelli, Anne van Klinken, Gustav G. Lindgren, Kaylee D. Hakkel, Francesco M. Pagliano, Petrus J. van Veldhoven, Rob W. van der Heijden, and Andrea Fiore "Highly-scalable fabrication of photonic crystal fiber-tip refractive index sensors", Proc. SPIE 11695, High Contrast Metastructures X, 116950B (5 March 2021); https://doi.org/10.1117/12.2577630
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