Optical characteristics of pore size on porous anodic aluminium oxide films with embedded silver nanoparticles

Chen Han Huang, Hsing Ying Lin, Yonhua Tzeng, Chien Hsiang Fan, Chih Yi Liu, Chia Yi Li, Cheng Wen Huang, Nan Kuang Chen, Hsiang Chen Chui

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Dielectric porous anodic aluminum oxide films embedded with two-dimensional silver nanoparticles arrays (porous Ag/AAO) have been fabricated by electrochemical anodization and deposition, wherein the position and rate of the Ag nanoparticles within the nanopores can be properly controlled. These porous Ag/AAO films have photo-induced plasmonic coupling and can be applied toward photo-absorption sensors. The plasmonic absorption is clearly visible and its absorption maximum red-shifts with increasing particle diameters. An investigation of how the absorption spectrum is influenced by systematically changing the pore diameter and inter-pore spacing is laid out. This work provides an approach to precisely tune the peak wavelength and the bandwidth of plasmonic absorption of porous Ag/AAO films utilizing fine control of the pore diameters. The wavelength shift slope of absorption peak with the pore diameter is measured to be approximately 0.82 nm/nm (peak wavelength/pore diameter). These tuning curves may be useful in the design of photon-response sensors and 2D tunable plasmonic-based nanostructure is expected to enable applications such as tunable photon-induced electrical conductivity.

Original languageEnglish
Pages (from-to)49-54
Number of pages6
JournalSensors and Actuators, A: Physical
Volume180
DOIs
Publication statusPublished - 2012 Jun 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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