Next Article in Journal
Refractive Index Sensor Based on Twisted Tapered Plastic Optical Fibers
Previous Article in Journal
Evidence of Intersubband Linewidth Narrowing Using Growth Interruption Technique
Previous Article in Special Issue
Tuning Plasmon Induced Reflectance with Hybrid Metasurfaces
Open AccessArticle

Numerical Analysis of Nonlocal Optical Response of Metallic Nanoshells

Center for Biomolecular Nanotechnologies, Istituto Italiano di Tecnologia, Via Barsanti 14, 73010 Arnesano (LE), Italy
Authors to whom correspondence should be addressed.
Photonics 2019, 6(2), 39;
Received: 19 March 2019 / Revised: 4 April 2019 / Accepted: 5 April 2019 / Published: 8 April 2019
Nonlocal and quantum effects play an important role in accurately modeling the optical response of nanometer-sized metallic nanoparticles. These effects cannot be described by conventional classical theories, as they neglect essential microscopic details. Quantum hydrodynamic theory (QHT) has emerged as an excellent tool to correctly predict the nonlocal and quantum effects by taking into account the spatial dependence of the charge density. In this article, we used a QHT to investigate the impact of nonlocality and electron spill-out on the plasmonic behavior of spherical Na and Au nanoshells. We adopted a self-consistent way to compute the equilibrium charge density. The results predicted by QHT were compared with those obtained with the local response approximation (LRA) and the Thomas–Fermi hydrodynamic theory (TFHT). We found that nonlocal effects have a strong impact on both the near- and far-field optical properties of nanoshells, in particular, for the antibonding resonant mode. We also investigated the optical response of these systems for different thicknesses of the shell, both for Na and Au metals. View Full-Text
Keywords: Plasmonics; nanoshell; nonlocal response; hydrodynamic theory Plasmonics; nanoshell; nonlocal response; hydrodynamic theory
Show Figures

Figure 1

MDPI and ACS Style

Khalid, M.; Ciracì, C. Numerical Analysis of Nonlocal Optical Response of Metallic Nanoshells. Photonics 2019, 6, 39.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop