Abstract
We studied the nonlinear response of a dimer composed of two identical Mie-resonant dielectric nanoparticles illuminated normally by a circularly polarized light. We developed a general theory describing hybridization of multipolar modes of the coupled nanoparticles and reveal nonvanishing nonlinear circular dichroism (CD) in the second-harmonic generation (SHG) signal enhanced by the multipolar resonances in the dimer, provided its axis is oriented under an angle to the crystalline lattice of the dielectric material. We supported our multipolar hybridization theory by experimental results obtained for the AlGaAs dimers placed on an engineered substrate.
| Original language | English |
|---|---|
| Pages (from-to) | 4381-4387 |
| Number of pages | 7 |
| Journal | Nano Letters |
| Volume | 21 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2021 May 26 |
Bibliographical note
Funding Information:Y.K. thanks P. Banzer, A. Krasnok, and V. Valev for useful comments and suggestions. K.F. thanks A.A. Bogdanov, K. Koshelev, and A.A. Nikolaeva for fruitful discussions. This work was supported by the Australian Research Council (grant DP210101292), the National Research Foundation (NRF) of Korea (grant 2021R1A2C3006781 funded by the Korean Government, MSIT) and the Russian Science Foundation (grant 21-72-30018). E.M. thanks the ACT Node of the Australian National Fabrication Facility (scanning electron microscope). H.-G.P. acknowledges support from the Samsung Research Funding & Incubation Center of Samsung Electronics (SRFC-MA2001-01). K.F. acknowledges support from the Foundation for the Advancement of Theoretical Physics and Mathematics ”BASIS” (Russia).
Publisher Copyright:
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Keywords
- Mie resonance
- circular dichroism
- hybridization
- nanoparticle
- second-harmonic generation
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering