skip to main content

SciTech ConnectSciTech Connect

Title: Optical properties of WO{sub 3} thin films using surface plasmon resonance technique

Indigenously assembled surface plasmon resonance (SPR) technique has been exploited to study the thickness dependent dielectric properties of WO{sub 3} thin films. WO{sub 3} thin films (80 nm to 200 nm) have been deposited onto gold (Au) coated glass prism by sputtering technique. The structural, optical properties and surface morphology of the deposited WO{sub 3} thin films were studied using X-ray diffraction, UV-visible spectrophotometer, Raman spectroscopy, and Scanning electron microscopy (SEM). XRD analysis shows that all the deposited WO{sub 3} thin films are exhibiting preferred (020) orientation and Raman data indicates that the films possess single phase monoclinic structure. SEM images reveal the variation in grain size with increase in thickness. The SPR reflectance curves of the WO{sub 3}/Au/prism structure were utilized to estimate the dielectric properties of WO{sub 3} thin films at optical frequency (λ = 633 nm). As the thickness of WO{sub 3} thin film increases from 80 nm to 200 nm, the dielectric constant is seen to be decreasing from 5.76 to 3.42, while the dielectric loss reduces from 0.098 to 0.01. The estimated value of refractive index of WO{sub 3} film is in agreement to that obtained from UV-visible spectroscopy studies. The strong dispersion in refractive index is observed with wavelength ofmore » incident laser light.« less
Authors:
; ;  [1] ;  [2]
  1. Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)
  2. Department of Physics, Miranda House, University of Delhi, Delhi 110007 (India)
Publication Date:
OSTI Identifier:
22275637
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; GOLD; MONOCLINIC LATTICES; MORPHOLOGY; PERMITTIVITY; PLASMONS; RAMAN SPECTROSCOPY; REFRACTIVE INDEX; RESONANCE; SCANNING ELECTRON MICROSCOPY; SPECTROPHOTOMETRY; SURFACES; THICKNESS; THIN FILMS; TUNGSTEN OXIDES; X-RAY DIFFRACTION