Open AccessMultipolar analysis of second-harmonic generation in (111) Gallium Arsenide nanoparticles
Author(s) -
Irina Volkovskaya,
Daria Smirnova,
Lei Xu,
Jürgen Sautter,
Andrey E. Miroshnichenko,
Mykhaylo Lysevych,
Rocio CamachoMorales,
Khosro Zangeneh Kamali,
F. Karouta,
Kaushal Vora,
Hoe Tan,
Martti Kauranen,
Isabelle Staude,
Chennupati Jagadish,
Dragomir N. Neshev,
Mohsen Rahmani
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1461/1/012185
Subject(s) - gallium arsenide , polarization (electrochemistry) , second harmonic generation , surface second harmonic generation , optics , radiation , physics , condensed matter physics , molecular physics , materials science , laser , optoelectronics , chemistry
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°.