Details
| Original language | English |
|---|---|
| Article number | 043151 |
| Number of pages | 14 |
| Journal | Physical Review Research |
| Volume | 5 |
| Issue number | 4 |
| Publication status | Published - 14 Nov 2023 |
Abstract
The optical properties of metallic nanoparticles are most often considered in terms of plasmons, the coupled states of light and quasifree electrons. Confinement of electrons inside the nanostructure leads to another, very different type of resonances. We demonstrate that these confinement-induced resonances typically join into a single composite "super-resonance,"located at significantly lower frequencies than the plasmonic resonance. This super-resonance influences the optical properties in the low-frequency range, in particular, producing giant nonlinearities. We show that such nonlinearities can be used for efficient down-conversion from optical to terahertz and midinfrared frequencies on the submicrometer propagation distances in nanocomposites. We discuss the interaction of the quantum-confinement-induced super-resonance with the conventional plasmonic ones, as well as the unusual quantum level statistics, adapting here the paradigms of the quantum billiard theory and showing the possibility to control the resonance position and width using the geometry of the nanostructures.
Keywords
- physics.optics, cond-mat.mes-hall
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical Review Research, Vol. 5, No. 4, 043151, 14.11.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Metallic nanostructures as electronic billiards for nonlinear terahertz photonics
AU - Babushkin, Ihar
AU - Shi, Liping
AU - Demircan, Ayhan
AU - Morgner, Uwe
AU - Herrmann, Joachim
AU - Husakou, Anton
N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
PY - 2023/11/14
Y1 - 2023/11/14
N2 - The optical properties of metallic nanoparticles are most often considered in terms of plasmons, the coupled states of light and quasifree electrons. Confinement of electrons inside the nanostructure leads to another, very different type of resonances. We demonstrate that these confinement-induced resonances typically join into a single composite "super-resonance,"located at significantly lower frequencies than the plasmonic resonance. This super-resonance influences the optical properties in the low-frequency range, in particular, producing giant nonlinearities. We show that such nonlinearities can be used for efficient down-conversion from optical to terahertz and midinfrared frequencies on the submicrometer propagation distances in nanocomposites. We discuss the interaction of the quantum-confinement-induced super-resonance with the conventional plasmonic ones, as well as the unusual quantum level statistics, adapting here the paradigms of the quantum billiard theory and showing the possibility to control the resonance position and width using the geometry of the nanostructures.
AB - The optical properties of metallic nanoparticles are most often considered in terms of plasmons, the coupled states of light and quasifree electrons. Confinement of electrons inside the nanostructure leads to another, very different type of resonances. We demonstrate that these confinement-induced resonances typically join into a single composite "super-resonance,"located at significantly lower frequencies than the plasmonic resonance. This super-resonance influences the optical properties in the low-frequency range, in particular, producing giant nonlinearities. We show that such nonlinearities can be used for efficient down-conversion from optical to terahertz and midinfrared frequencies on the submicrometer propagation distances in nanocomposites. We discuss the interaction of the quantum-confinement-induced super-resonance with the conventional plasmonic ones, as well as the unusual quantum level statistics, adapting here the paradigms of the quantum billiard theory and showing the possibility to control the resonance position and width using the geometry of the nanostructures.
KW - physics.optics
KW - cond-mat.mes-hall
UR - http://www.scopus.com/inward/record.url?scp=85178050949&partnerID=8YFLogxK
U2 - 10.1103/PhysRevResearch.5.043151
DO - 10.1103/PhysRevResearch.5.043151
M3 - Article
VL - 5
JO - Physical Review Research
JF - Physical Review Research
SN - 2643-1564
IS - 4
M1 - 043151
ER -