Abstract
Recent advances in Surface Plasmon Resonance (SPR) technologies have shown the possibility of transmission enhancement of localized modes propagating through sub-diffraction wide slits and apertures, resulting in the strong near-field focusing of metallic planar nanostructures. This work presents a new approach to the fabrication of high-resolution near-field optical probes using 3D lithography in combination with numerical finite difference time domain (FDTD) simulations. A narrow 500 nm depth of field focus area was observed both by numerical analysis and near field scanning optical microscopy (NSOM) measurements. Further research and optimization are planned in order to achieve subwavelength focal regions and increased signal intensities.
Highlights
We demonstrated the 3D concept of plasmonic MRZ structure on the polymer-metal
We demonstrated the 3D concept of plasmonic MRZ structure on the polymer-metal basis with strong near-field transmission enhanced by surface plasmon resonance
The basis with strong near-field transmission enhanced by surface plasmon resonance
Summary
Citation: Micek, P.; Pudis, D.; Gaso, P.; Durisova, J.; Jandura, D. MicroringZone Structure for Near-Field Probes.Coatings 2021, 11, 1363. https://doi.org/10.3390/coatings11111363Academic Editor: Rafael TaboryskiReceived: 30 September 2021Accepted: 30 October 2021Published: 5 November 2021Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.Licensee MDPI, Basel, Switzerland.Attribution (CC BY) license (https://
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