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<p>This study explores the tunable infrared filtering properties of a one-dimensional (1D) defective photonic crystal (PhC) featuring a pressure-sensitive polymer defect layer. Using the transfer matrix method, we examine a multilayer structure of Gallium Arsenide (GaAs) and Silica (SiO₂), incorporating defect layers of Polystyrene (PS), Polymethyl Methacrylate (PMMA), and Ammonium Dihydrogen Phosphate (ADP). Hydrostatic pressure alters these polymers’ refractive indices, shifting the transmission spectra’s localised defect mode. Results show that increasing pressure narrows the photonic band gap and reduces the quality factor, with PS exhibiting the increased pressure sensitivity. Conversely, increasing defect layer thickness improves the transmittance peak and quality factor, with PMMA showing the best thickness-based tunability. These outcomes offer valuable insights into pressure-dependent optical tuning and demonstrate the potential of these structures in developing compact, tunable IR filters for advanced photonic, optical sensing, and optoelectronic applications across a broad spectral range.</p>

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Pressure-controlled IR filtering via acrylate-embedded nanocomposite defect layers in photonic crystals

  • 期刊论文

  • 发表日期：

    2026年5月29日

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  • Arvind Sharma,
  • Yogesh Sharma,
  • Mirza Tanweer Ahmad Beig,
  • Shobhit K. Patel,
  • Malek G. Daher

摘要

This study explores the tunable infrared filtering properties of a one-dimensional (1D) defective photonic crystal (PhC) featuring a pressure-sensitive polymer defect layer. Using the transfer matrix method, we examine a multilayer structure of Gallium Arsenide (GaAs) and Silica (SiO₂), incorporating defect layers of Polystyrene (PS), Polymethyl Methacrylate (PMMA), and Ammonium Dihydrogen Phosphate (ADP). Hydrostatic pressure alters these polymers’ refractive indices, shifting the transmission spectra’s localised defect mode. Results show that increasing pressure narrows the photonic band gap and reduces the quality factor, with PS exhibiting the increased pressure sensitivity. Conversely, increasing defect layer thickness improves the transmittance peak and quality factor, with PMMA showing the best thickness-based tunability. These outcomes offer valuable insights into pressure-dependent optical tuning and demonstrate the potential of these structures in developing compact, tunable IR filters for advanced photonic, optical sensing, and optoelectronic applications across a broad spectral range.