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TUTCRIS

Multipolar analysis of second-harmonic generation in (111) Gallium Arsenide nanoparticles

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Otsikko4th International Conference on Metamaterials and Nanophotonics, METANANO 2019
KustantajaIOP Publishing
Sivumäärä4
DOI - pysyväislinkit
TilaJulkaistu - 2020
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Conference on Metamaterials and Nanophotonics, METANANO 2019 - St. Petersburg, Venäjä
Kesto: 15 heinäkuuta 201919 heinäkuuta 2019

Julkaisusarja

NimiJournal of Physics: Conference Series
KustantajaIOP Publishing
Vuosikerta1461
ISSN (painettu)1742-6588

Conference

ConferenceInternational Conference on Metamaterials and Nanophotonics, METANANO 2019
MaaVenäjä
KaupunkiSt. Petersburg
Ajanjakso15/07/1919/07/19

Tiivistelmä

We perform multipolar analysis of second-harmonic generation (SHG) from (111)-grown gallium arsenide (GaAs) nanoantennas and discuss its specifics. It was experimentally demonstrated that the conversion efficiency in axially-symmetric (111) GaAs nanoparticles remains constant under the polarization rotation of normally incident radiation in a wide range of particle sizes, while the SHG radiation pattern changes. We apply the analytical method based on the Lorentz lemma to explain this behaviour. The induced nonlinear current is decomposed into two rotating contributions, which are shown to generate multipoles of different parities. Thus, the total SHG intensity in the far-field is proved to be independent of the in-plane rotation of the pump polarization. Nevertheless, due to the threefold symmetry of the crystal with regard to the (111) direction, the SHG radiation pattern rotates around the polar axis repeating its shape every 60°.

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