About this Research Topic
Vector field of light usually refers to the shaping of light in the spatial degrees of freedom including amplitude, phase, and polarization. In recent years, there has been a rapid increase of exploration in vector field of light due to its various applications across multiple fields, such as enhanced optical trapping, microscopy, communications bandwidth and security, etc. The use of vector field of light in meta-optics has demonstrated unique advantages as compared to linearly polarized beam. It can selectively enhance the coupling to specific multipolar resonances and modes of interest. This unique feature of vector field can provide stronger ability to manipulate light at the nanoscale, holding a promising platform for enhancing multipolar light-matter interactions in nanostructures. One aim in nonlinear nanophotonics is to explore different approaches to enhance the nonlinear interactions of light with materials and devices, such as structuring nanomaterials in different shapes, including dielectric nanoparticles, plasmonic nanostructures, photonic crystals, etc. Vector field of light has emerged as a promising tool to propel the nonlinear nanophotonics field through optical beam engineering on the multipolar resonances and modes.
Optical resonant nanostructures, including individual nanoparticles, metasurfaces and metammaterials etc., can support various multipolar Mie resonances (by high-refractive-index dielectric materials) or plasmonic resonances (metal materials). Vector beam provides a powerful tool for exciting some specific resonances or modes with high coupling efficiency. Applying vector field of light in the nonlinear nanophotonics fields expected to bring new opportunities for nonlinear optics applications, including harmonic generation, wave mixing, all-optical switching. Furthermore, shaping nonlinear light also lead to the realization of vector field generation based on nonlinear optical processes. It has the advantage of background-free detection as the harmonics are generated at different frequencies compared to the pump.
The Research Topic aims at giving a view of the state-of-the-art research of utilising vector field in nonlinear nanophotonics science, applying vector field of light in the nonlinear nanophotonics field to explore different materials structuring by nonlinear light-matter interactions, novel nonlinear nanomaterial investigation techniques, enhancing nonlinear light-matter interactions.
The potential topics include, but not limited to the following:
• Vector beam excited nonlinear optics: nonlinear harmonic generation and nonlinear radiation from optically resonant nanostructures.
• Vectorial nonlinear optical generation.
• Nonlinear optical emission control with vector beams.
• Vectorial nonlinear microscopy.
• Nonlinear optical processes and applications with vector beams.
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