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Spatially Resolved Nonlinear Plasmonics

Title data

Schust, Johannes ; Mangold, Florian ; Sterl, Florian ; Metz, Niklas ; Schumacher, Thorsten ; Lippitz, Markus ; Hentschel, Mario ; Giessen, Harald:
Spatially Resolved Nonlinear Plasmonics.
In: Nano Letters. Vol. 23 (24 May 2023) Issue 11 . - pp. 5141-5147.
ISSN 1530-6992

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft (SPP1391 ”Ultrafast Nanooptics”, SPP1839 ”Tailored Disorder”, SPP1929 ”Giant Interactions in Rydberg Systems”), European Research Council (Advanced Grant ComplexPlas, PoC Grant 3DPrintedOptics), Bundesministerium fr Bildung und Forschung and Carl-Zeiss Stiftung.

Abstract in another language

Nonlinear optical plasmonics investigates the emission of plasmonic nanoantennas with the aid of nonlinear spectroscopy. Here we introduce nonlinear spatially resolved spectroscopy (NSRS) which is capable of imaging the k-space as well as spatially resolving the THG signal of gold nanoantennas and investigating the emission of individual antennas by wide-field illumination of entire arrays. Hand in hand with theoretical simulations, we demonstrate our ability of imaging various oscillation modes inside the nanostructures and therefore spatial emission hotspots. Upon increasing intensity of the femtosecond excitation, an individual destruction threshold can be observed. We find certain antennas becoming exceptionally bright. By investigating those samples taking structural SEM images of the nanoantenna arrays afterward, our spatially resolved nonlinear image can be correlated with this data proving that antennas had deformed into a peanut-like shape. Thus, our NSRS setup enables the investigation of a nonlinear self-enhancement process of nanoantennas under critical laser excitation.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics III - Nanooptics > Chair Experimental Physics III - Nanooptics - Univ.-Prof. Dr. Markus Lippitz
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 14 Jul 2023 07:14
Last Modified: 14 Jul 2023 07:14