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18 April 2021 Enhancement of the intrinsic nonlinear response in few-atom-thick metallic films
Álvaro Rodríguez Echarri, Fadil Iyikanat, Joel Cox, F. Javier García de Abajo
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Proceedings Volume 11770, Nonlinear Optics and Applications XII; 1177007 (2021) https://doi.org/10.1117/12.2589115
Event: SPIE Optics + Optoelectronics, 2021, Online Only
Abstract
Atomically thin films possess appealing intrinsic properties for nonlinear optics that we explore employing a rigorous quantum-mechanical description. The main optical response is driven by plasmons, the collective oscillation of conduction electrons, which are modeled through the proper consideration of the dominant features of their electronic band structure, including surface and quantum well states along with the bandgap arising for each crystallographic facet. We report a beneficial use of films decreasing in thickness down to few-atom-thick sizes, influencing both the linear and the nonlinear optical response. Such a degree of tunability makes them unique together with lower losses compared to their amorphous counterparts. These results facilitate the development of atomically-thin nonlinear nanophotonic devices based on well-defined crystalline metal films.
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Álvaro Rodríguez Echarri, Fadil Iyikanat, Joel Cox, and F. Javier García de Abajo "Enhancement of the intrinsic nonlinear response in few-atom-thick metallic films", Proc. SPIE 11770, Nonlinear Optics and Applications XII, 1177007 (18 April 2021); https://doi.org/10.1117/12.2589115
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KEYWORDS
Crystals
Nonlinear crystals
Nonlinear response
Metals
Photonic crystals
Plasmonics
Plasmons
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