3D printing of plasmonic nanofocusing tip enabling high resolution, high throughput and high contrast optical near-field imaging.
Journal
Light, science & applications
ISSN: 2047-7538
Titre abrégé: Light Sci Appl
Pays: England
ID NLM: 101610753
Informations de publication
Date de publication:
06 Sep 2023
06 Sep 2023
Historique:
received:
04
08
2023
accepted:
22
08
2023
revised:
08
08
2023
medline:
7
9
2023
pubmed:
7
9
2023
entrez:
6
9
2023
Statut:
epublish
Résumé
Scanning near-field optical microscopy (SNOM) offers a means to reach a fine spatial resolution down to ~ 10 nm, but unfortunately suffers from low transmission efficiency of optical signal. Here we present design and 3D printing of a fiber-bound polymer-core/gold-shell spiral-grating conical tip that allows for coupling the inner incident optical signal to the outer surface plasmon polariton with high efficiency, which then adiabatically transport, squeeze, and interfere constructively at the tip apex to form a plasmonic superfocusing spot with tiny size and high brightness. Numerical simulations and optical measurements show that this specially designed and fabricated tip has 10% transmission efficiency, ~ 5 nm spatial resolution, 20 dB signal-to-noise ratio, and 7000 pixels per second fast scanning speed. This high-resolution, high throughput, and high contrast SNOM would open up a new frontier of high spatial-temporal resolution detecting, imaging, and monitoring of single-molecule physical, chemical, and biological systems, and deepen our understanding of their basic science in the single-molecule level.
Identifiants
pubmed: 37673900
doi: 10.1038/s41377-023-01272-6
pii: 10.1038/s41377-023-01272-6
pmc: PMC10483034
doi:
Types de publication
Journal Article
Langues
eng
Pagination
219Informations de copyright
© 2023. Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), CAS.
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