Plasmonics

, Volume 12, Issue 3, pp 899–904 | Cite as

Photonic Crystal Waveguide Biochemical Sensor for the Approximation of Chemical Components Concentrations

Article

Abstract

The rapid progress in chemical and biochemical applications with optical interfaces has motivated an ever-increasing demand for highly sensitive, accurate, and disposable photonic components. We propose a design of biochemical sensor to identify the chemical components acid concentrations with a greater accuracy using photonic crystal waveguide (PCW). It consists of circular air holes of radius 0.44 a (a being the lattice constant), arranged in a hexagonal structure on silicon on insulator (SOI). Due to change in refractive index of the sample, resonance wavelength shifts towards higher wavelengths (red shift) with a higher coefficient of determination. The proposed design allows desired input wavelength of 1550 nm to be guided in the waveguide for an effective identification of chemical component concentration. Resolution and limit of detection are calculated as 1.2 nm and 4 × 10−2 RIU for sulfuric acid (H2SO4) solution and 0.2 nm and 2 × 10−2 RIU for hydrogen peroxide (H2O2) solution. Improved sensitivities with increased standard deviations are achieved after structural optimization.

Keywords

Photonic bandgap materials Photonic crystals Waveguide Optical sensing and sensors Optical properties 

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Optical Fiber Communication Research Laboratory (OFCR Lab), ECE DepartmentThapar Institute of Engineering and Technology UniversityPatialaIndia
  2. 2.Integrated Photonics Laboratory, Department of Electrical EngineeringIndian Institute of TechnologyIndoreIndia

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