Photothermal reshaping of gold nanoparticles in a plasmonic absorber
2011 (English)In: Optics Express, ISSN 1094-4087, Vol. 19, no 15, 14726-14734 p.Article in journal (Refereed) Published
We experimentally demonstrate that a metamaterial nanostructure can have a localized heating response owing to plasmonic resonances in the near-infrared wavelength range (from 1.5 to 2 mu m). With a broadband nanosecond-pulse light, the temperature of composing gold particles in the nanostructure can be easily increased to over 900K within only several nanoseconds, resulting in re-shaping of the particles. The photothermal effect is elaborated with finite-element based numerical simulations. The absorption resonance can in principle be tailored with a great freedom by choosing appropriate metamaterial parameters. The light-induced heating in an artificial metamaterial can be potentially used for all-optical acute temperature tuning in a micro-environment, which may open new frontiers especially in nanotechnology and biotechnology.
Place, publisher, year, edition, pages
2011. Vol. 19, no 15, 14726-14734 p.
OPTICAL-PROPERTIES, FEMTOSECOND, NANORODS, HEAT, NANOSHELLS, PARTICLES, ABLATION, METALS
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-37264DOI: 10.1364/OE.19.014726ISI: 000292877600104ScopusID: 2-s2.0-79960539232OAI: oai:DiVA.org:kth-37264DiVA: diva2:433670
FunderSwedish Research Council
QC 201108102011-08-102011-08-082014-03-31Bibliographically approved