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Theoretical study on Surface-enhanced Raman scattering effects of gold nanoparticles in Terahertz range

ZHANG YONG-MING1, REN GUANG-JUN1,* , BAI YU-KUN2, YAO JIAN-QUAN3

Affiliation

  1. School of Electronics Information Engineering; Tianjin Key Lab. Of Film Electronic & Communication Devices; Engineering Research Center of Communication Devices and Technology, Ministry of Education
  2. School of Computer & Communication Engineering, Engineering Research Center of Communication Devices and Technology, Ministry of Education, Tianjin University of Technology; Tianjin 300384, PR China
  3. College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics; Key Laboratory of Optoelectric Information Science and Technology, Ministry of Education, Ti

Abstract

We present here a theoretical analysis of the possibility to combine SERS with THz by investigating the electromagnetic enhancement effect of gold nanoparticles with visible to near-infrared and THz excitation. By means of the FDTD simulations, the electrical field enhancement, and thus the SERS enhancement factor of the gold nanoparticles with different sizes and interparticle separations are demonstrated, which indicate that the SERS effect exists in THz range as well and the SERS enhancement factor could reach 105 for 10 THz under the condition of certain size and interparticle distance. Therefore the SERS effect could be extended from ultraviolet, visible and near-infrared to THz regime..

Keywords

Gold nanoparticles, SERS, Terahertz.

Submitted at: July 16, 2014
Accepted at: June 9, 2016

Citation

ZHANG YONG-MING, REN GUANG-JUN, BAI YU-KUN, YAO JIAN-QUAN, Theoretical study on Surface-enhanced Raman scattering effects of gold nanoparticles in Terahertz range, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 5-6, pp. 498-503 (2016)