Open AccessEnhanced Raman Scattering for Probing Near‐Field Distribution in All‐Dielectric Nanostructures
Author(s) -
Zograf George,
Baryshnikova Kseniia,
Petrov Mihail,
Makarov Sergey
Publication year - 2021
Publication title -
advanced photonics research
Language(s) - English
Resource type - Journals
ISSN - 2699-9293
DOI - 10.1002/adpr.202000139
Subject(s) - nanophotonics , raman scattering , dielectric , cathodoluminescence , near and far field , materials science , excitation , scattering , near field scanning optical microscope , nanostructure , raman spectroscopy , optics , light scattering , polarization (electrochemistry) , field (mathematics) , optoelectronics , local field , near field optics , nanotechnology , physics , optical microscope , condensed matter physics , chemistry , luminescence , scanning electron microscope , mathematics , quantum mechanics , pure mathematics
Resonant all‐dielectric nanophotonic structures have recently demonstrated enhancement of light emission and localization of near‐fields outside and inside the nanoresonators of various functionality. However, probing of the near‐field is still a time‐consuming and challenging procedure, requiring near‐field optical microscopy or cathodoluminescence approaches. On the contrary, inherent light emission such as Raman scattering from all‐dielectric nanostructures can provide important information on their resonant properties. Herein, probing of near‐field spatial distribution around a silicon trimer qualitatively using far‐field excitation of Raman scattering is demonstrated. The geometry of a single excitation and collection objective with lateral scanning is implemented. With this technique, switching near‐field distribution in the silicon trimer by changing the polarization of the incident light is observed. The full‐wave numerical simulations support the observed experimental results. It is believed that such an approach will be useful for near‐field probing of various all‐dielectric resonant nanostructures with a simple far‐field optical scheme.