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<p>We present a theoretical study of sensing performance of one-dimensional photonic crystal (1D PC) and quasi-periodic photonic crystal (1D QPC) structures based on Fibonacci and Thue–Morse sequences. The study focuses on the effect of the refractive indices of high- and low-dielectric layers on key performance parameters, including resonant wavelength, sensitivity, quality factor (QF), and figure of merit (FOM). Our results reveal that higher the refractive index contrast of a high-dielectric refractive index and a low-dielectric layer optimize sensing characteristics. The periodic 1D PC achieved the highest value of FOM as 58.65 /RIU, while the Fibonacci-based 1D QPC achieved the highest value of FOM as 289.07 /RIU. These can reflect the significant of quasi-periodic photonic crystal structure over periodic structure for better performance as optical sensor.</p>

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Refractive index engineering in periodic and quasi-periodic 1d photonic crystals for improved optical sensing

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Sumitra Dewal,
  • Bhuvneshwer Suthar,
  • Vijent Bhojak

摘要

We present a theoretical study of sensing performance of one-dimensional photonic crystal (1D PC) and quasi-periodic photonic crystal (1D QPC) structures based on Fibonacci and Thue–Morse sequences. The study focuses on the effect of the refractive indices of high- and low-dielectric layers on key performance parameters, including resonant wavelength, sensitivity, quality factor (QF), and figure of merit (FOM). Our results reveal that higher the refractive index contrast of a high-dielectric refractive index and a low-dielectric layer optimize sensing characteristics. The periodic 1D PC achieved the highest value of FOM as 58.65 /RIU, while the Fibonacci-based 1D QPC achieved the highest value of FOM as 289.07 /RIU. These can reflect the significant of quasi-periodic photonic crystal structure over periodic structure for better performance as optical sensor.