Surface Plasmon Resonance of Large-Size Ag Nanobars

Micromachines

Lin Cheng¹  Wenhui Wang²  Fan Wu³ 

[1] Department of Physics and Max Planck Centre for Extreme and Quantum Photonics, University of Ottawa, Ottawa, ON K1N 6N5, Canada;Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi’an Jiaotong University, Xi’an 710049, China;School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China;

关键词: large-size Ag nanobar;    localized surface plasmon resonance;    scattering cross-section;    FDTD simulation;   

DOI  :  10.3390/mi13040638

来源: DOAJ

【 摘 要 】

Silver nanobars have attracted much attention due to their distinctive localized surface plasmon resonance (LSPR) in the visible and near-infrared regions. In this work, large-size Ag nanobars (length: 400~1360 nm) working at a longer-wavelength near-infrared range (>1000 nm) have been synthesized. By using the finite-difference time-domain (FDTD) simulation, the LSPR properties of a single large-size Ag nanobar are systematically investigated. The LSPR in Ag nanobar can be flexibly tuned in a wide wavelength range (400~2000 nm) by changing the bar length or etching the bar in the length direction. Our work provides a flexible way to fabricate nanoparticle arrays using large-size nanobars and throws light on the applications of large-size nanomaterials on wide spectral absorbers, LSPR-based sensors and nanofilters.

【 授权许可】

Unknown