Plasmonic nanostructures: local versus nonlocal response

Giuseppe Toscano; Martijn Wubs; Sanshui Xiao; Min Yan; Z. Fatih Öztürk; Antti-Pekka Jauho; N. Asger Mortensen

doi:10.1117/12.860774

10 September 2010 Plasmonic nanostructures: local versus nonlocal response

Giuseppe Toscano, Martijn Wubs, Sanshui Xiao, Min Yan, Z. Fatih Öztürk, Antti-Pekka Jauho, N. Asger Mortensen

Proceedings Volume 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII; 77571T (2010) https://doi.org/10.1117/12.860774
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

We study the importance of taking the nonlocal optical response of metals into account for accurate determination of optical properties of nanoplasmonic structures. Here we focus on the computational physics aspects of this problem, and in particular we report on the nonlocal-response package that we wrote for state-of the art numerical software, enabling us to take into account the nonlocal material response of metals for any arbitrarily shaped nanoplasmonic structures, without much numerical overhead as compared to the standard local response. Our method is a frequency-domain method, and hence it is sensitive to possible narrow resonances that may arise due to strong electronic quantum confinement in the metal. This feature allows us to accurately determine which geometries are strongly affected by nonlocal response, for example regarding applications based on electric field enhancement properties for which metal nanostructures are widely used.

Citation Download Citation

Giuseppe Toscano, Martijn Wubs, Sanshui Xiao, Min Yan, Z. Fatih Öztürk, Antti-Pekka Jauho, and N. Asger Mortensen "Plasmonic nanostructures: local versus nonlocal response", Proc. SPIE 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, 77571T (10 September 2010); https://doi.org/10.1117/12.860774

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