Published May 4, 2022 | Version v1
Journal article Open

Holographic Manipulation of Nanostructured Fiber Optics Enables Spatially-Resolved, Reconfigurable Optical Control of Plasmonic Local Field Enhancement and SERS

Creators

  • 1. Istituto Italiano di Tecnologia, Center for Biomolecular Nanotechnologies, Arnesano, LE 73010, Italy
  • 2. Dipartimento di Ingegneria Elettrica e dell'Informazione, Politecnico di Bari, Bari, 70125 Italy
  • 3. Instituto Cajal, CSIC, Ave Doctor Arce, Madrid, 28002 Spain
  • 4. Center for Biomolecular Nanotechnologies, Istituto Italiano di Tecnologia, Arnesano LE, 73010 Italy Dipartimento di Ingegneria Dell'Innovazione, Università del Salento, Lecce, 73100 Italy

Description

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 benefit from nanostructured fiber optics. Fortunately, harnessing the interaction between plasmonic modes on the fiber tip and the full set of guided modes can bring this technology to a next generation progress. Here, the intrinsic wealth of information of guided modes is exploited to spatiotemporally control the plasmonic resonances of the coupled system. This concept is shown by employing dynamic phase modulation to structure both the response of plasmonic MMFs on the plasmonic facet and their response in the corresponding Fourier plane, achieving spatial selective field enhancement and direct control of the probe's work point in the dispersion diagram. Such a conceptual leap would transform the biomedical applications of holographic endoscopic imaging by integrating new sensing and manipulation capabilities.

Notes

L.C. and Fi.P. contributed equally to this work. M.D.V. and Fe.P. jointly supervised and are co-last authors of this work. L.C., D.Z., L.M.P., C.C., M.D.V., and Fe.P. acknowledge European Union's Horizon 2020 Research and Innovation Program under Grant Agreement No. 828972. Fi.P., A.B., and Fe.P. acknowledge European Research Council under the European Union's Horizon 2020 Research and Innovation Program under Grant Agreement No. 677683. Fi.P., M.D.V., and Fe.P. acknowledge European Union's Horizon 2020 Research and Innovation Program under Grant Agreement No 101016787. M.P. and M.D.V. acknowledge European Research Council under the European Union's Horizon 2020 Research and Innovation Program under Grant Agreement No. 692943. M.P., Fe.P., and M.D.V. acknowledge U.S. National Institutes of Health (Grant No. 1UF1NS108177-01). M.D.V. acknowledges U.S. National Institutes of Health (Grant No. U01NS094190). Open Access Funding provided by Istituto Italiano di Tecnologia within the CRUI-CARE Agreement.

Files

Small - 2022 - Collard - Holographic Manipulation of Nanostructured Fiber Optics Enables Spatially‐Resolved Reconfigurable.pdf

Files (3.3 MB)

Additional details

Related works

Is identical to
10.1002/smll.202200975 (DOI)

Funding

European Commission
MODEM – Multipoint Optical DEvices for Minimally invasive neural circuits interface 677683
European Commission
BrainBIT – All-optical brain-to-brain behaviour and information transfer 692943
European Commission
DEEPER – DEEP BRAIN PHOTONIC TOOLS FOR CELL-TYPE SPECIFIC TARGETING OF NEURAL DISEASES 101016787
National Institutes of Health
Controlling the spatial extent of light-based monitoring and manipulation of neural activity in vivo 1UF1NS108177-01
European Commission
NanoBRIGHT – BRInGing nano-pHoTonics into the brain 828972