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5 March 2021 Microscopic nonlinear optical characteristics of plasmonic meta-atoms
M. Saad Bin-Alam, Joshua Baxter, Kashif M. Awan, Antti Kiviniemi, Yaryna Mamchur, Antonino Cala’ Lesina, Kosmas L. Tsakmakidis, Mikko J. Huttunen, Lora Ramunno, Ksenia Dolgaleva
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Proceedings Volume 11694, Photonic and Phononic Properties of Engineered Nanostructures XI; 116940C (2021) https://doi.org/10.1117/12.2576783
Event: SPIE OPTO, 2021, Online Only
Abstract
Hyperpolarizability is a measure of the nonlinear optical characteristics of natural or meta-atoms describing how the atoms become nonlinearly polarized by the induced local-field. However, determining hyperpolarizability in the case of structured plasmonic meta-atoms is not straightforward due to their relatively larger sizes, unique shapes, and the index of refraction of the surrounding dielectric medium. Also, the order-of-magnitude of hyperpolarizability may vary with the frequency of light especially when inter-band transitions in metals become dominant. Here, we experimentally and theoretically estimated the order-of-magnitude of the 1st-order hyperpolarizability of gold meta-atoms that can be used in designing nonlinear metasurfaces.
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M. Saad Bin-Alam, Joshua Baxter, Kashif M. Awan, Antti Kiviniemi, Yaryna Mamchur, Antonino Cala’ Lesina, Kosmas L. Tsakmakidis, Mikko J. Huttunen, Lora Ramunno, and Ksenia Dolgaleva "Microscopic nonlinear optical characteristics of plasmonic meta-atoms", Proc. SPIE 11694, Photonic and Phononic Properties of Engineered Nanostructures XI, 116940C (5 March 2021); https://doi.org/10.1117/12.2576783
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KEYWORDS
Plasmonics
Nonlinear response
Nanostructures
Circuit switching
Gold
Harmonic generation
Nonlinear metamaterials
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