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<p>This study examines the impact of unit cell materials in photonic structures on optical characteristics and the formation of photonic bandgaps. The 4 × 4 transfer matrix was utilized to derive the optical properties. The results demonstrate the significance of unit cell materials in obtaining tunable photonic bandgaps. The results indicate that photonic bandgaps PBG1, PBG2, and PBG3 are established through the use of unit cells containing two, three, and four dielectric materials, respectively. The tri-layer unit cell design achieves a broad photonic bandgap width of 42.8&#xa0;μm, while the four-layer design achieves photonic bandgap widths of 41.7&#xa0;μm and 32&#xa0;μm. The hybridized design facilitated the achievement of an ultra-wide photonic bandgap measuring 150&#xa0;μm in width. The findings illustrate the formulation of multiple and wide photonic bandgaps with the proposed design. This work offers an applications in wideband terahertz reflectors, bio-medical imaging, terahertz energy harvesting.</p>

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A comprehensive study on photonic bandgap broadening: hybridized and cascaded photonic structures

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Pulimi Mahesh,
  • E. Kamalanaban,
  • Chittaranjan Nayak,
  • Damodar Panigrahy

摘要

This study examines the impact of unit cell materials in photonic structures on optical characteristics and the formation of photonic bandgaps. The 4 × 4 transfer matrix was utilized to derive the optical properties. The results demonstrate the significance of unit cell materials in obtaining tunable photonic bandgaps. The results indicate that photonic bandgaps PBG1, PBG2, and PBG3 are established through the use of unit cells containing two, three, and four dielectric materials, respectively. The tri-layer unit cell design achieves a broad photonic bandgap width of 42.8 μm, while the four-layer design achieves photonic bandgap widths of 41.7 μm and 32 μm. The hybridized design facilitated the achievement of an ultra-wide photonic bandgap measuring 150 μm in width. The findings illustrate the formulation of multiple and wide photonic bandgaps with the proposed design. This work offers an applications in wideband terahertz reflectors, bio-medical imaging, terahertz energy harvesting.