DataVXACS PhotonicsPaper
journal article·2022-03-16Open access

Second Harmonic Optical Circular Dichroism of Plasmonic Chiral Helicoid-III Nanoparticles

Florian Spreyer, Jungho Mun, Hyeohn Kim, Ryeong Myeong Kim, Ki Tae Nam, Junsuk Rho, Thomas Zentgraf

ACS Photonics· Volume 9· Issue 3
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Source abstract

Abstract

While plasmonic particles can provide optical resonances in a wide spectral range from the lower visible up to the near-infrared, often, symmetry effects are utilized to obtain particular optical responses. By breaking certain spatial symmetries, chiral structures arise and provide robust chiroptical responses to these plasmonic resonances. Here, we observe strong chiroptical responses in the linear and nonlinear optical regime for chiral L-handed helicoid-III nanoparticles and quantify them by means of an asymmetric factor, the so-called g-factor. We calculate the linear optical g-factors for two distinct chiroptical resonances to -0.12 and -0.43 and the nonlinear optical g-factors to -1.45 and -1.63. The results demonstrate that the chirality of the helicoid-III nanoparticles is strongly enhanced in the nonlinear regime.
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Research context

Nanomaterials

OpenAlex topics: Plasmonic and Surface Plasmon Research · Gold and Silver Nanoparticles Synthesis and Applications · Metamaterials and Metasurfaces Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany

Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea

Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea

Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea

POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics, Pohang 37673, Republic of Korea

Funding

LG Display · Deutscher Akademischer Austauschdienst · National Research Foundation of Korea · European Commission

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