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Related Experiment Videos

High sensitivity waveguide grating sensor based on radiative losses.

V Kochergin1, I Avrutsky, Y Zhao

  • 1Department of Electrical and Computer Engineering, Wayne State University, Detroit, MI 48202, USA. kocherg@ece.eng.wayne.edu

Biosensors & Bioelectronics
|February 24, 2001
PubMed
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This study introduces a novel waveguide sensor method for measuring adsorbed layer thickness using radiation loss coefficients. The sensor shows high sensitivity to layer formation, enabling advanced multiparameter sensing applications.

Area of Science:

  • Photonics and optical sensing technologies.
  • Surface science and thin-film analysis.
  • Integrated optics and waveguide devices.

Background:

  • Waveguide sensors are crucial for detecting surface changes.
  • Accurate measurement of adsorbed layer thickness is challenging.
  • Existing methods may lack sensitivity or specificity.

Purpose of the Study:

  • To analyze a waveguide sensor scheme using a short grating coupler.
  • To propose a new method for evaluating average adsorbed layer thickness.
  • To investigate the sensor's sensitivity and potential for multiparameter sensing.

Main Methods:

  • Analysis of a waveguide sensor with a grating coupler length shorter than the coupling length.
  • Measurement of radiation loss coefficients.

Related Experiment Videos

  • Evaluation of sensor response to adsorbed layers, temperature, and analyte concentration.

    • Main Results:

    • The proposed method accurately evaluates average adsorbed layer thickness.
    • The sensor exhibits a strong response to adsorbed layer formation.
    • The scheme demonstrates relatively weaker responses to temperature and analyte concentration fluctuations.
    • New possibilities for multiparameter sensing were identified.

    Conclusions:

    • The developed waveguide sensor scheme offers a sensitive method for adsorbed layer thickness evaluation.
    • The sensor's distinct responses enable selective detection of surface formation.
    • The approach opens avenues for advanced multiparameter sensing applications.