Size-dependent nonlocal effects in plasmonic semiconductor particles

Abstract

Localized surface plasmons (LSP) in semiconductor particles are expected to exhibit spatial nonlocal response effects as the geometry enters the nanometer scale. To investigate these nonlocal effects, we apply the hydrodynamic model to nanospheres of two different semiconductor materials: intrinsic InSb and $n$-doped GaAs. Our results show that the semiconductors indeed display nonlocal effects, and that these effects are even more pronounced than in metals. In a $150\mathrm{nm}$ InSb particle at $300\mathrm{K}$, the LSP frequency is blueshifted 35%, which is orders of magnitude larger than the blueshift in a metal particle of the same size. This property, together with their tunability, makes semiconductors a promising platform for experiments in nonlocal effects.

7 pages, 3 figures, 1 table, corrected typos in text and figure 2

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Cited by in corpus (13)

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• Theory of Optical Nonlocality in Polar Dielectrics
• Roadmap on Nonlocality in Photonic Materials and Metamaterials
• Free electron nonlinearities in heavily doped semiconductors plasmonics
• Two-fluid hydrodynamic model for semiconductors
• Impact of graphene on the polarizability of a neighbour nanoparticle: a dyadic Green's function study
• Two-fluid, hydrodynamic model for spherical electrolyte systems
• Influence of spatial dispersion on surface plasmons, nanoparticles and grating couplers
• Hydrodynamic acoustic plasmon resonances in semiconductor nanowires and their dimers
• Generalized electromagnetic theorems for non-local plasmonics
• Multiple Embedded Eigenstates in Nonlocal Plasmonic Nanostructures
• Monopole Embedded Eigenstate in Nonlocal epsilon-Near Zero Nanostructures
• Impact of surface charge depletion on the free electron nonlinear response of heavily doped semiconductors