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Nonlinear Circular Dichroism in Mie-Resonant Nanoparticle Dimers
- Authors
- Frizyuk, Kristina; Melik-Gaykazyan, Elizaveta; Choi, Jae-Hyuck; Petrov, Mihail, I; Park, Hong-Gyu; Kivshar, Yuri
- Issue Date
- 26-5월-2021
- Publisher
- AMER CHEMICAL SOC
- Keywords
- circular dichroism; second-harmonic generation; nanoparticle; Mie resonance; hybridization
- Citation
- NANO LETTERS, v.21, no.10, pp.4381 - 4387
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANO LETTERS
- Volume
- 21
- Number
- 10
- Start Page
- 4381
- End Page
- 4387
- ISSN
- 1530-6984
- 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.
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