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<p>Conventional optical communication and sensing systems face persistent challenges related to bandwidth limitations, signal attenuation, and insufficient sensitivity. In this study, we designed and fabricated hybrid Nano photonic thin films that integrate silicon, III–V semiconductors, and gold nanoparticles. The films were deposited using scalable techniques including “atomic layer deposition” (ALD), “plasma-enhanced chemical vapor deposition” (PECVD), and spin-coating, and characterized using SEM, XRD, and UV–Vis spectroscopy. These experiments confirm structural uniformity and optical responsiveness of the hybrid films. Complementary COMSOL and MATLAB simulations were performed to investigate light confinement, propagation losses, and refractive index sensitivity. The simulations predict a refractive index sensitivity approaching 1000&#xa0;nm/RIU and significant reductions in propagation loss, while preliminary experimental measurements validate enhanced spectral responsiveness. This research reveals the possibility of hybrid Nano photonic thin films for practical applications such as environmental gas monitoring (NO₂), bio sensing of cancer biomarkers, and improved energy-efficient optical communication links. By combining experimental fabrication with simulation-driven optimization, this study establishes a scalable platform for integrating Nano photonic thin films into next-generation photonic and sensing devices.</p>

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Hybrid nano photonic thin films for biosensing and integrated light control applications

  • 期刊论文

  • 发表日期：

    2025年10月15日

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  • E. Velumani,
  • M. Shanthi

摘要

Conventional optical communication and sensing systems face persistent challenges related to bandwidth limitations, signal attenuation, and insufficient sensitivity. In this study, we designed and fabricated hybrid Nano photonic thin films that integrate silicon, III–V semiconductors, and gold nanoparticles. The films were deposited using scalable techniques including “atomic layer deposition” (ALD), “plasma-enhanced chemical vapor deposition” (PECVD), and spin-coating, and characterized using SEM, XRD, and UV–Vis spectroscopy. These experiments confirm structural uniformity and optical responsiveness of the hybrid films. Complementary COMSOL and MATLAB simulations were performed to investigate light confinement, propagation losses, and refractive index sensitivity. The simulations predict a refractive index sensitivity approaching 1000 nm/RIU and significant reductions in propagation loss, while preliminary experimental measurements validate enhanced spectral responsiveness. This research reveals the possibility of hybrid Nano photonic thin films for practical applications such as environmental gas monitoring (NO₂), bio sensing of cancer biomarkers, and improved energy-efficient optical communication links. By combining experimental fabrication with simulation-driven optimization, this study establishes a scalable platform for integrating Nano photonic thin films into next-generation photonic and sensing devices.