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Integration of plasmonic nanostructures with fiber‐optics‐based neural probes enables label‐free detection of molecular fingerprints via surface‐enhanced Raman spectroscopy (SERS), and it represents a fascinating technological horizon to investigate brain function. However, developing neuroplasmonic probes that can interface with deep brain regions with minimal invasiveness while providing the sensitivity...
Neurochemical Detection
In article number 2200902, Di Zheng, Massimo De Vittorio, Ferruccio Pisanello, and co‐workers present a surface‐enhanced Raman scattering (SERS)‐active probe based on a tapered optical fiber decorated with sub‐10 nm‐gap gold nanoislands, which is designed for neurochemical detection. Through‐fiber measurements show the fabricated device can detect neurotransmitters down to...
Plasmonics
In article number 2200975, Liam Collard, Massimo De Vittorio, Ferruccio Pisanello, and co‐workers use wavefront engineering to harness the resonant properties of plasmonic nanostructures on the tip of a multimode fiber and spotlight specific resonances across the dispersion diagram to enable spatially‐resolved surface enhanced Raman spectroscopy and reconfigurable beam steering. [Cover...
Integration of plasmonic structures on step‐index optical fibers is attracting interest for both applications and fundamental studies. However, the possibility to dynamically control the coupling between the guided light fields and the plasmonic resonances is hindered by the turbidity of light propagation in multimode fibers (MMFs). This pivotal point strongly limits the range of studies that can...
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