Electric and Magnetic Hotspots via Hollow InSb Microspheres for Enhanced Terahertz Spectroscopy.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
27 Feb 2019
27 Feb 2019
Historique:
received:
27
07
2018
accepted:
11
11
2018
entrez:
1
3
2019
pubmed:
1
3
2019
medline:
1
3
2019
Statut:
epublish
Résumé
We study electric and magnetic hotspots in the gap between hollow InSb microspheres forming dimers and trimers. The outer radius, core volume fraction, distance, and temperature of the microspheres can be chosen to achieve field enhancement at a certain frequency corresponding to the transition between energy levels of a molecule placed in the gap. For example, utilizing 80 μm radius spheres at a gap of 2 μm held at a temperature of 295 K, allow electric field intensity enhancements of 10-2880 and magnetic field intensity enhancements of 3-61 in the frequency window 0.35-1.50 THz. The core volume fraction and the ambient temperature affect the enhancements, particularly in the frequency window 1.5-2 THz. Electric and magnetic hotspots are promising for THz absorption and circular dichroism spectroscopy.
Identifiants
pubmed: 30814534
doi: 10.1038/s41598-018-35833-2
pii: 10.1038/s41598-018-35833-2
pmc: PMC6393507
doi:
Types de publication
Journal Article
Langues
eng
Pagination
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