Enhanced Optical Transmission Mediated by Localized Plasmons in Anisotropic, Three-Dimensional Nanohole Arrays

• Published in: Nano letters Vol. 10; no. 8; pp. 3173 - 3178
• Main Authors: Yang, Jiun-Chan, Gao, Hanwei, Suh, Jae Yong, Zhou, Wei, Lee, Min Hyung, Odom, Teri W
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 11.08.2010
• Subjects: Biological and medical sciences; Biotechnology; Collective excitations (including excitons, polarons, plasmons and other charge-density excitations); Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Fullerenes and related materials; Fundamental and applied biological sciences. Psychology; Materials science; Methods of nanofabrication; Methods. Procedures. Technologies; Nanolithography; Nanostructures; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Others; Physics; Surface and interface electron states; Surface Plasmon Resonance; Various methods and equipments; Visible and ultraviolet spectra; Nanohole array; molding; plasmonics; localized surface plasmon; enhanced optical transmission; surface plasmon polariton; Cutting; Optoelectronics; Optical transmission; Anisotropy; Plasmon polariton interaction; Absorption spectra; Nanolithography; Arrays; Surface plasmons; Medical application
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl102078j

This paper describes three-dimensional (3D) nanohole arrays whose high optical transmission is mediated more by localized surface plasmon (LSP) excitations than by surface plasmon polaritons (SPPs). First, LSPs on 3D hole arrays lead to optical transmission an order of magnitude higher than 2D planar hole arrays. Second, LSP-mediated transmission is broadband and more tunable than SPP-enhanced transmission, which is restricted by Bragg coupling. Third, for the first time, two types of surface plasmons can be selectively excited and manipulated on the same plasmonic substrate. This new plasmonic substrate fabricated by high-throughput nanolithography techniques paves the way for cutting-edge optoelectronic and biomedical applications.