Terahertz conductivity and coupling between geometrical and plasmonic resonances in nanostructures

0505087 - FZÚ 2020 RIV US eng J - Journal Article
Kuchařík, Jiří - Němec, Hynek - Ostatnický, T.
Terahertz conductivity and coupling between geometrical and plasmonic resonances in nanostructures.
Physical Review B. Roč. 99, č. 3 (2019), s. 1-9, č. článku 035407. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA MŠMT EF16_019/0000760; GA ČR GA17-04412S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : terahertz conductivity * nanostructures * degenerate electron gas
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.575, year: 2019
Method of publishing: Limited access
https://doi.org/10.1103/physrevb.99.035407

Terahertz conductivity spectra of charges moving ballistically in one-, two-, and three-dimensional infinitely deep rectangular potential wells were investigated theoretically using semiclassical and quantum Kubo formulas. The conductivity spectrum of a degenerate electron gas in these nanostructures exhibits a series of geometrical resonances. These further couple with plasmon resonances occurring in isolated structures: qualitatively different interaction regimes are found in one-, two-, and three-dimensional nanostructures. In contrast, the response of a nondegenerate electron gas smears into a single broad band due to the excessive spectral broadening caused by the wide distribution of charge velocities.
Permanent Link: http://hdl.handle.net/11104/0296605