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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Plasma cell sensor using photonic crystal cavity.

Zaky A Zaky1, Basma Moustafa1, Arafa H Aly1

  • 1TH-PPM Group, Physics Department, Faculty of Sciences, Beni-Suef University, Beni-Suef, Egypt.

Optical and Quantum Electronics
|October 4, 2021
PubMed
Summary

This study theoretically analyzes a one-dimensional photonic crystal sensor for plasma cell detection. The device shows high sensitivity and a high Q-factor, indicating potential for biosensing applications.

Keywords:
BiosensorBlood componentsPhotonic crystalPlasma cellsTransfer matrix method (TMM)

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Area of Science:

  • Photonics
  • Biosensing
  • Optical sensors

Background:

  • Plasma cell detection is crucial for diagnosing and monitoring various diseases.
  • Existing biosensing technologies face challenges in sensitivity and specificity.
  • Photonic crystals offer unique optical properties for sensing applications.

Purpose of the Study:

  • To theoretically investigate the performance of a one-dimensional photonic crystal for plasma cell detection.
  • To evaluate the sensor's ability to detect changes in refractive index related to plasma cells.
  • To determine the sensitivity and Q-factor of the proposed photonic crystal sensor.

Main Methods:

  • Theoretical analysis of a one-dimensional photonic crystal structure.
  • Simulating the infiltration of plasma cells through a defect layer.
  • Analyzing the shift in resonant peak positions based on refractive index variations.

Main Results:

  • The photonic crystal structure demonstrated the ability to detect changes in refractive index.
  • A significant red-shift in the defect peak was observed with increasing refractive index (from 2195 to 2322 nm).
  • The sensor achieved a high sensitivity of 3300 nm/RIU and a Q-factor of 10^3.

Conclusions:

  • The proposed one-dimensional photonic crystal sensor exhibits high performance for detecting refractive index changes.
  • The sensor shows great potential for sensitive and specific biosensing applications, including convalescent plasma detection.