4.6 Article

Boosting Light Collection Efficiency of Optical Fibers Using Metallic Nanostructures

Journal

ACS PHOTONICS
Volume 6, Issue 3, Pages 691-698

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.8b01560

Keywords

fiber optics; plasmonics; light collection; nanoparticles; fiber probe

Funding

  1. Thuringian State - European Regional Development Fund (ERDF) [2015FGI0011, 2015-0021]
  2. Chinese Scholarship Council [201509110107]

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Optical fibers represent one of the most important photonic components with applications in numerous fields; however, their performance with respect to light collection at large incident angles is severely limited. Here, we show that arrays of metallic nanodots located on the end faces of regular step index fibers allow addressing incoupling angles up to 80 at high efficiencies, representing a regime in which bare fibers fail to operate. The experimental demonstrations including lithographic implementation and optical characterization supported by corresponding numerical simulations and a toy model reveal the feasibility and potential of the concept of nanostructure-enhanced fiber incoupling, which is compatible with other types of nanostructures and can lead to significant improvements, particularly in the fields of bioanalytics and quantum technologies.

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