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Enhancement of sensitivity of the refractive index using ITO coating on LPG

NIDHI1,2,* , R. S. KALER2, PAWAN KAPUR1

Affiliation

  1. Central Scientific Instruments Organization, Chandigarh, 160030 - India (Council for Scientific and Industrial Research, New Delhi)
  2. Thapar University, Patiala 147004 India

Abstract

In this paper, an Indium Tin Oxide (ITO) coated LPG (Long Period Grating) refractive index (RI) sensor is experimentally demonstrated. The metal oxide coating is analyzedand optimized with respect to surface morphology and spectroscopic properties.The RI characterization for coated and uncoated LPG using aqueous solutions of glycerol with different concentrations is carried out.Field emission scanning electron microscope (FESEM), Raman spectroscopy and Fourier Transform Infrared Spectroscopy (FTIR) have provided detailed evidence and analysis of attachment of the amalgamation on LPG surface using adapted dip coating methodology. The RI sensitivity of coated LPG is enhanced by a factor 2-3 for the glycerol solution ranging RI from 1.3490 to 1.4198..

Keywords

Refractive index sensitivity, Long Period Grating, ITO, Chemical sensor.

Citation

NIDHI, R. S. KALER, PAWAN KAPUR, Enhancement of sensitivity of the refractive index using ITO coating on LPG, Optoelectronics and Advanced Materials - Rapid Communications, 8, 1-2, January-February 2014, pp.45-48 (2014).

Submitted at: Sept. 2, 2013

Accepted at: Jan. 22, 2014