Journal article
Near-Field Observation of Guided-Mode Resonances on a Metasurface via Dielectric Nanosphere Excitation
Goethe University Frankfurt1
St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO)2
Department of Photonics Engineering, Technical University of Denmark3
Metamaterials, Department of Photonics Engineering, Technical University of Denmark4
Department of Applied Mathematics and Computer Science, Technical University of Denmark5
Cyber Security, Department of Applied Mathematics and Computer Science, Technical University of Denmark6
We study laser-induced guided-mode resonances on an ultrathin anisotropic metallic metasurface using direct near-field mapping. Coupling of the incident light to the guided-mode resonances is provided by a resonant laser-printed silicon nanosphere placed on the metasurface using nanomanipulation under electron-beam supervision.
To visualize the propagation of the guided modes, we employ scattering-type scanning near-field optical microscopy in the near-infrared region (850 nm). The guided-mode resonances excited by the nanosphere demonstrate vanishing anisotropy due to weak confinement at the metasurface/air interface. We also extract the wavenumber of the observed modes through Fourier transformation of the measured near-field maps and find it to be in good agreement with numerical calculations.
| Language: | English |
|---|---|
| Publisher: | American Chemical Society |
| Year: | 2018 |
| Pages: | 4238-4243 |
| ISSN: | 23304022 |
| Types: | Journal article |
| DOI: | 10.1021/acsphotonics.8b00900 |
| ORCIDs: | Malureanu, Radu , Lavrinenko, Andrei , Bogdanov, Andrey , 0000-0001-8221-4720 , 0000-0002-4246-7747 and 0000-0002-3701-9528 |
anisotropy guided-mode resonance metasurface nano-optics s-SNOM surface waves
