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Plasmonic enhanced photothermal effects and its applications
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO. Zhejiang University, China.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Optics and Photonics, OFO.
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2014 (English)Conference paper, Published paper (Refereed)
Abstract [en]

We review here our recent studies on plasmonic enhanced photothermal effects in metallic nanostructure, and the applications of such effects. When light is shined on a prefect metamaterial absorber patterned with e-beam lithography, the gold nanoparticles (NPs) forming the absorber can be either transformed to nano-spherical-domes, or to truncated-octahedral shaped or multi-twined nanocrystals with large crystal grain sizes and flat boundary facets. The evolution of morphology and crystallinity of the gold NPs can be also observed. Evidences clearly show that the surface melting and the coalescence mechanism play a key role on nanocrystals formation. These melted gold nanospheres can even be transferred to another substrate, on which the transferred NPs exhibit excellent size uniformity. The strong photothermal effects can also be utilized to tune silicon photonics waveguides and resonators. It is shown that all-optical photothermal switching of Mach-Zehnder interferometers (MZI), silicon disk resonators, and silicon ring resonators is possible with the help of plasmonic nanoheaters. The switching response time and power consumption are all at reasonably low level.

Place, publisher, year, edition, pages
2014.
Series
International Conference on Transparent Optical Networks, ISSN 2162-7339 ; 6876429
Keyword [en]
Nanocrystals, Optical absorber, Photothermal effects, Photothermal switching, Gold, Photonics, Resonators, Silicon, Transparent optical networks, Coalescence mechanisms, Evolution of morphologies, Machzehnder interferometers (MZI), Metallic nanostructure, Optical absorbers, Photo-thermal, Silicon ring resonator, Plasmons
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-167621DOI: 10.1109/ICTON.2014.6876429Scopus ID: 2-s2.0-84906739724ISBN: 9781479956005 (print)OAI: oai:DiVA.org:kth-167621DiVA: diva2:813914
Conference
16th International Conference on Transparent Optical Networks, ICTON 2014, 6 July 2014 through 10 July 2014, Graz
Note

QC 20150525

Available from: 2015-05-25 Created: 2015-05-22 Last updated: 2017-03-28Bibliographically approved

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Yan, Min

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