DataVXACS NanoPaper
journal article·2015-10-27

Accurate Modeling of Dark-Field Scattering Spectra of Plasmonic Nanostructures

Liyong Jiang, Tingting Yin, Zhaogang Dong, Mingyi Liao, Shawn J. Tan, Xiao Ming Goh, David Allioux, Hailong Hu, Xiangyin Li, Joel K. W. Yang, Zexiang Shen

ACS Nano· Volume 9· Issue 10
Publisher page
Source abstract

Abstract

Dark-field microscopy is a widely used tool for measuring the optical resonance of plasmonic nanostructures. However, current numerical methods for simulating the dark-field scattering spectra were carried out with plane wave illumination either at normal incidence or at an oblique angle from one direction. In actual experiments, light is focused onto the sample through an annular ring within a range of glancing angles. In this paper, we present a theoretical model capable of accurately simulating the dark-field light source with an annular ring. Simulations correctly reproduce a counterintuitive blue shift in the scattering spectra from gold nanodisks with a diameter beyond 140 nm. We believe that our proposed simulation method can be potentially applied as a general tool capable of simulating the dark-field scattering spectra of plasmonic nanostructures as well as other dielectric nanostructures with sizes beyond the quasi-static limit.
Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Plasmonic and Surface Plasmon Research · Gold and Silver Nanoparticles Synthesis and Applications · Optical Coatings and Gratings

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Nanophotonic Laboratory, Department of Physics, Nanjing University of Science and Technology, Nanjing 210094, China

Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371

Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602

School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371

Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372

Funding

Science and Engineering Research Council, Agency for Science, Technology and Research · Nanjing University of Science and Technology · National Research Foundation-Prime Minister's office, Republic of Singapore · Agency for Science, Technology and Research · Ministry of Education - Singapore · National Natural Science Foundation of China · Natural Science Foundation of Jiangsu Province

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