CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 11080 > Article
Presentation
9 September 2019 Plasmonic nanocone metamaterials for broadband enhancement of local field (Conference Presentation)
Viktor A. Podolskiy, Brian Wells, R. Margoth Córdova-Castro, Anatoly Zayats
Author Affiliations +
Proceedings Volume 11080, Metamaterials, Metadevices, and Metasystems 2019; 1108018 (2019) https://doi.org/10.1117/12.2529427
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States
Abstract
Enhancement of local electromagnetic fields is instrumental for engineering of light absorption, emission, scattering, chemical reactions, and other processes. Nanostructured composites with plasmonic inclusions have been shown as promising candidates to concentrate electromagnetic waves in nanometer-sized “hot spots”. Unfortunately, majority of high-performance plasmonic structures are resonance-based, and therefore their performance is relatively narrow-band. Here we present a novel material system that has potential to realize broadband enhancement of local intensity and explain the origin of this behavior. The proposed material platform comprises an array of aligned plasmonic cones arranged in a periodic planar lattice. From the effective medium standpoint, such structure represents a uniaxial material whose effective permittivity varies along the cone. Importantly, there exists a relatively wide range of wavelengths where one component of the effective permittivity tensor crosses zero within the composite. According to previous research, strong enhancement of local field is expected in the vicinity of epsilon-near-zero point in homogeneous materials with spatially varying permittivity, often called transitional metamaterials. We show, however, that due to strong structural nonlocality electromagnetic response of nanocone media does not follow this recipe. In fact, we demonstrate that the incoming radiation is coupled into an additional electromagnetic wave that propagates towards the tip of the cone causing a strong enhancement to the local field. We present a comprehensive description of this phenomenon.
Conference Presentation
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Viktor A. Podolskiy, Brian Wells, R. Margoth Córdova-Castro, and Anatoly Zayats "Plasmonic nanocone metamaterials for broadband enhancement of local field (Conference Presentation)", Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 1108018 (9 September 2019); https://doi.org/10.1117/12.2529427
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
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
Advertisement
Advertisement
KEYWORDS
Plasmonics
Metamaterials
Composites
Electromagnetic radiation
Electromagnetism
Light scattering
Absorption
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top