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Investigation of dipole emission near a dielectric metasurface using a dual-tip scanning near-field optical microscope

Abbasirad, Najmeh; Barreda, Angela; Arslan, Dennis; Steinert, Michael; Fasold, Stefan; Rockstuhl, Carsten ORCID iD icon; Staude, Isabelle; Setzpfandt, Frank; Pertsch, Thomas

Abstract:

A wide variety of near-field optical phenomena are described by the interaction of dipole radiation with a nanophotonic system. The electromagnetic field due to the dipole excitation is associated with the Green’s function. It is of great interest to investigate the dipole interaction with a photonic system and measure the near-field Green’s function and the quantities it describes, e.g., the local and cross density of optical states. However, measuring the near-field Green’s function requires a point-source excitation and simultaneous near-field detection below the diffraction limit. Conventional single-tip near-field optical microscope (SNOM) provides either a point source excitation or amplitude and phase detection with subwavelength spatial resolution. The automated dual-tip SNOM, composed of two tips, has overcome the experimental challenges for simultaneous near-field excitation and detection. Here, we investigate the dipole emission in the near-field of a dielectric metasurface using the automated dual-tip SNOM. We have analyzed the near-field pattern and directional mode propagation depending on the position of the dipole emission relative to the metasurface. ... mehr

Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Theoretische Festkörperphysik (TFP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 02.11.2021
Sprache Englisch
Identifikator ISSN: 2192-8614, 2192-8606
KITopen-ID: 1000139757
HGF-Programm 43.32.02 (POF IV, LK 01) Designed Optical Materials
Erschienen in Nanophotonics
Verlag De Gruyter
Band 10
Heft 18
Seiten 4511-4522
Vorab online veröffentlicht am 22.10.2021
Schlagwörter dielectric metasurface; dipole emission; dual-tip SNOM; Green’s function; near-field; partial LDOS
Nachgewiesen in Dimensions
Web of Science
Scopus

Verlagsausgabe §
DOI: 10.5445/IR/1000139757
Veröffentlicht am 12.11.2021
Originalveröffentlichung
DOI: 10.1515/nanoph-2021-0429
Scopus
Zitationen: 7
Web of Science
Zitationen: 4
Dimensions
Zitationen: 5
Seitenaufrufe: 140
seit 13.11.2021
Downloads: 91
seit 19.11.2021
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