"

Cookies ussage consent

I agree.

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

Enhanced SPR response using Au/GO thin films via Kretschmann coupling by controlling the incident light intensities

NOOR FAEZAH MURAT1, WAN MAISARAH MUKHTAR1,* , P. SUSTHITHA MENON2

Affiliation

  1. Faculty of Science and Technology, Universiti Sains Islam Malaysia (USIM), Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
  2. Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia

Abstract

Monolayer Au and hybrid Au/GO thin films with thicknesses of 50 nm and 52 nm sequentially, were deposited onto the glass substrate. The effect of laser intensities towards SPP excitation via Kretschmann coupling technique was investigated by varying laser intensities between 30 nW to 80 nW. Maximum SPR represented by the smallest value of Rmin =0.0838 a.u was obtained as 80 nW of laser intensity had incident onto the hybrid films. The deployment of 52 nm Au/GO resulted excellent SPR properties indicated by the greatest Q-factor=0.7668 a.u with percentage difference about 22.24 % in comparison with 50 nm monolayer Au thin film. The utilization of high intensity light demonstrated significant increment of Q-factor value, in which the SPR response was successfully amplified due to the maximum number of photons pumped by the laser.

Keywords

Surface plasmon resonance (SPR), Gold-graphene oxide (Au/GO), Laser intensities, Kretschmann, Q-factor.

Citation

NOOR FAEZAH MURAT, WAN MAISARAH MUKHTAR, P. SUSTHITHA MENON, Enhanced SPR response using Au/GO thin films via Kretschmann coupling by controlling the incident light intensities, Optoelectronics and Advanced Materials - Rapid Communications, 14, 11-12, November-December 2020, pp.482-486 (2020).

Submitted at: June 10, 2020

Accepted at: Nov. 25, 2020