Numerical study of spherical nanomatryoshkas by using quantum hydrodynamic theory (Conference Presentation)

Muhammad Khalid; Cristian Ciracì

doi:10.1117/12.2320042

18 September 2018 Numerical study of spherical nanomatryoshkas by using quantum hydrodynamic theory (Conference Presentation)

Muhammad Khalid, Cristian Ciracì

Author Affiliations +

Proceedings Volume 10734, Quantum Nanophotonics 2018; 107340O (2018) https://doi.org/10.1117/12.2320042
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

Microscopic dynamics of plasmonic systems characterized by sub-nanometer gaps can be crucial to accurately describe their macroscopic optical properties. First-principle quantum mechanical approaches, such as Time-Dependent Density Functional Theory (TD-DFT), can give a very good approximation although their applicability is often limited to very small systems due to computational costs. Quantum hydrodynamic theory (QHT) is a promising tool which can efficiently predict the optical response of multiscale plasmonic systems. We apply this theory to investigate plasmonic response of spherical nanomatryoshkas (NMs), which are concentric core-shell structures, for Au and Na metals in the quantum tunneling regime. The results obtained for Au NMs are in a very good agreement with those of TD-DFT, already reported in the literature. We also study optical properties of quite big systems, both for Au and Na, whose sizes make them inaccessible for DFT calculations. We analyze the impact of core-shell spacing on near-field and far-field optical behavior of these systems and find that the QHT method predicts the nonlocal and quantum effects in multiscale plasmonic systems in an efficient manner. A systematic comparison between the local response, Thomas-Fermi and QHT approximations has also been presented. The results show that as the core-shell distance decreases the nonlocal or quantum effects strongly influence the plasmonic properties of these systems which can be nicely described by the QHT. For numerical implementation of these structures, we fully exploit the symmetry of the geometry and use a 2.5D simulation technique which reduces the computational efforts to a great extent.

Conference Presentation

Citation Download Citation

Muhammad Khalid and Cristian Ciracì "Numerical study of spherical nanomatryoshkas by using quantum hydrodynamic theory (Conference Presentation)", Proc. SPIE 10734, Quantum Nanophotonics 2018, 107340O (18 September 2018); https://doi.org/10.1117/12.2320042

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Quantum physics

Plasmonics

Spherical lenses

Gold

Near field optics

Optical properties

Quantum efficiency

Show All Keywords

Keywords/Phrases

Search In:

Publication Years