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Journal Articles Physical Review Letters Year : 2022

Quantization of Acoustic Modes in Dumbbell Nanoparticles


The vibrational eigenmodes of dumbbell-shaped polystyrene nanoparticles are recorded by Brillouin light spectroscopy (BLS), and the full experimental spectra are calculated theoretically. Different from spheres with a degeneracy of (2l + 1), with l being the angular momentum quantum number, the eigenmodes of dumbbells are either singly or doubly degenerate owing to their axial symmetry. The BLS spectrum reveals a new, low-frequency peak, which is attributed to the out-of-phase vibration of the two lobes of the dumbbell. The quantization of acoustic modes in these molecule-shaped dumbbell particles evolves from the primary colloidal spheres as the separation between the two lobes increases
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hal-03596987 , version 1 (04-03-2022)


Attribution - CC BY 4.0



Zuyuan Wang, Hojin Kim, Maria Secchi, Maurizio Montagna, Eric Furst, et al.. Quantization of Acoustic Modes in Dumbbell Nanoparticles. Physical Review Letters, 2022, 128 (4), pp.048003. ⟨10.1103/PhysRevLett.128.048003⟩. ⟨hal-03596987⟩
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