Resonant terahertz light absorption by virtue of tunable hybrid interface phonon-plasmon modes in semiconductor nanoshells
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NIKA, Denis; POKATILOV, Evghenii; FOMIN, Vladimir; DEVREESE, JosefT.; TEMPERE, Jacques. Resonant terahertz light absorption by virtue of tunable hybrid interface phonon-plasmon modes in semiconductor nanoshells. In: Applied Sciences (Switzerland). 2019, nr. 7(9), p. 0. ISSN 2076-3417.
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Applied Sciences (Switzerland)
Numărul 7(9) / 2019 / ISSN 2076-3417

Resonant terahertz light absorption by virtue of tunable hybrid interface phonon-plasmon modes in semiconductor nanoshells


DOI: 10.3390/app9071442
Pag. 0-0

Nika Denis12, Pokatilov Evghenii12, Fomin Vladimir134, Devreese JosefT.2, Tempere Jacques2
 
1 State University of Moldova,
2 Universiteit Antwerpen, Antwerpen,
3 National Research Nuclear University MEPhI, Moscow,
4 Institut fuer Integrative Nanowissenschaften, Leibniz-Institut fuer Festkoerper- und Werkstoffforschung Dresden
 
Disponibil în IBN: 19 aprilie 2019


Rezumat

Metallic nanoshells have proven to be particularly versatile, with applications in biomedical imaging and surface-enhanced Raman spectroscopy. Here, we theoretically demonstrate that hybrid phonon-plasmon modes in semiconductor nanoshells offer similar advantages in the terahertz regime. We show that, depending on tm,n,nhe doping of the semiconductor shells, terahertz light absorption in these nanostructures can be resonantly enhanced due to the strong coupling between interface plasmons and phonons. A threefold to fourfold increase in the absorption peak intensity was achieved at specific values of electron concentration. Doping, as well as adapting the nanoshell radius, allowed for fine-tuning of the absorption peak frequencies.

Cuvinte-cheie
absorption, Nanoshells, phonons, plasmons