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<p>Light-emitting diodes (LEDs) have become a cornerstone of modern optoelectronics due to their energy efficiency, long lifespan, and compact size. However, achieving optimal light extraction efficiency remains a significant challenge. Bragg gratings, with their ability to selectively reflect or transmit specific wavelengths of light, offer a promising solution to enhance LED performance. This study investigates using Bragg’s grating fabricated from five optical materials, BK7, BAF10, LASF9, SF10, and Fused Silica, to optimize LED efficiency. The optical performance of these materials is evaluated at four wavelengths 850&#xa0;nm, 1310&#xa0;nm, 1500&#xa0;nm, and 1550&#xa0;nm by analyzing their transmitted, reflected, and absorbed light efficiencies. The results demonstrate that Fused Silica exhibits the highest transmitted efficiency of 94.80% to 95.08% and the lowest reflected efficiency of 5.20% to 4.92%, making it the most suitable material for LED applications. BK7 also performs well, with transmitted efficiencies ranging from 93.04% to 93.34%. In contrast, LASF9 and SF10 show lower transmission efficiencies but higher reflection efficiencies, making them suitable for applications requiring high reflectivity, such as optical filters. Notably, all materials exhibit 0% absorbance, indicating minimal light loss due to absorption. This study provides valuable insights into material selection and design optimization for Bragg’s grating-based LED applications. The findings suggest that Fused Silica is ideal for high-efficiency LEDs, while LASF9 is better suited for applications requiring high reflectivity.</p>

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Multi-material Bragg gratings for high-performance light-emitting diodes

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Gopinath Palai,
  • Archana Rath,
  • Abinash Panda,
  • Kaliprasanna Swain

摘要

Light-emitting diodes (LEDs) have become a cornerstone of modern optoelectronics due to their energy efficiency, long lifespan, and compact size. However, achieving optimal light extraction efficiency remains a significant challenge. Bragg gratings, with their ability to selectively reflect or transmit specific wavelengths of light, offer a promising solution to enhance LED performance. This study investigates using Bragg’s grating fabricated from five optical materials, BK7, BAF10, LASF9, SF10, and Fused Silica, to optimize LED efficiency. The optical performance of these materials is evaluated at four wavelengths 850 nm, 1310 nm, 1500 nm, and 1550 nm by analyzing their transmitted, reflected, and absorbed light efficiencies. The results demonstrate that Fused Silica exhibits the highest transmitted efficiency of 94.80% to 95.08% and the lowest reflected efficiency of 5.20% to 4.92%, making it the most suitable material for LED applications. BK7 also performs well, with transmitted efficiencies ranging from 93.04% to 93.34%. In contrast, LASF9 and SF10 show lower transmission efficiencies but higher reflection efficiencies, making them suitable for applications requiring high reflectivity, such as optical filters. Notably, all materials exhibit 0% absorbance, indicating minimal light loss due to absorption. This study provides valuable insights into material selection and design optimization for Bragg’s grating-based LED applications. The findings suggest that Fused Silica is ideal for high-efficiency LEDs, while LASF9 is better suited for applications requiring high reflectivity.