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How Dark Are Radial...
How Dark Are Radial Breathing Modes in Plasmonic Nanodisks?
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- Schmidt, Franz Philipp (författare)
- Graz University of Technology,Karl-Franzens-University of Graz
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- Losquin, Arthur (författare)
- Lund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,University of Bordeaux
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- Hofer, Ferdinand (författare)
- Graz University of Technology
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- Hohenau, Andreas (författare)
- Karl-Franzens-University of Graz
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- Krenn, Joachim R. (författare)
- Karl-Franzens-University of Graz
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- Kociak, Mathieu (författare)
- University of Paris-Saclay
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(creator_code:org_t)
- 2017-12-12
- 2018
- Engelska 6 s.
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Ingår i: ACS Photonics. - : American Chemical Society (ACS). - 2330-4022. ; 5:3, s. 861-866
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://pubs.acs.org...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Due to a vanishing dipole moment, radial breathing modes in small flat plasmonic nanoparticles do not couple to light and have to be probed with a near-field source, as in electron energy loss spectroscopy (EELS). With increasing particle size, retardation gives rise to light coupling, enabling probing breathing modes optically or by cathodoluminescence (CL). Here, we investigate single silver nanodisks with diameters of 150-500 nm by EELS and CL in an electron microscope and quantify the EELS/CL ratio, which corresponds to the ratio of full to radiative damping of the breathing mode. For the investigated diameter range, we find the CL signal to increase by about 1 order of magnitude, in agreement with numerical simulations. Due to reciprocity, our findings corroborate former optical experiments and enable a quantitative understanding of the light coupling of dark plasmonic modes.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- cathodoluminescence
- electron energy loss spectroscopy
- nanoparticles
- Plasmonics
- transmission electron microscopy
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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