Elbialy Samar, El-den B M, Ashraf Eman
Electronics and Communications Department, Faculty of Engineering, Delta University for Science and Technology, Gamasa, Egypt.
Sci Rep. 2024 Nov 27;14(1):29465. doi: 10.1038/s41598-024-80724-4.
This research aims to contribute significantly to the field of plasmonic filtering technology within modern optical communication systems. By focusing on the development of a high-performance, more compact, and efficient design, this study explores the potential of hybrid plasmonic filters to revolutionize optical filtering applications. The approach leverages an innovative active material with electrically tunable permittivity, allowing for dynamic control over the filter's optical properties. The research specifically examines four types of filters: low-pass filters (LPF), high-pass filters (HPF), band-pass filters (BPF), and band-reject filters (BRF). These filters are designed to operate effectively across a broad wavelength range of 1200-1800 nm, achieving a transmittance exceeding 98% at the output port, while maintaining isolation with transmittance below 2% at the isolated ports. The structure demonstrates a FWHM of approximately 216 nm for the band-pass filter and approximately 223 nm for the band-reject filter, which are considered moderate values, ensuring the versatility and multifunctionality of the design. The ultra-compact size, with a footprint of just 21 µm, makes these filters particularly advantageous for integration into space-constrained optical communication systems.
本研究旨在为现代光通信系统中的等离子体滤波技术领域做出重大贡献。通过专注于开发高性能、更紧凑且高效的设计，本研究探索了混合等离子体滤波器在革新光学滤波应用方面的潜力。该方法利用了一种具有电可调介电常数的创新活性材料，从而能够对滤波器的光学特性进行动态控制。本研究具体考察了四种类型的滤波器：低通滤波器（LPF）、高通滤波器（HPF）、带通滤波器（BPF）和带阻滤波器（BRF）。这些滤波器设计为在1200 - 1800纳米的宽波长范围内有效运行，在输出端口实现超过98%的透过率，同时在隔离端口保持低于2%的透过率的隔离度。该结构对于带通滤波器的半高宽约为216纳米，对于带阻滤波器约为223纳米，这些被认为是适中的值，确保了设计的通用性和多功能性。超紧凑的尺寸，占地面积仅为21微米，使得这些滤波器对于集成到空间受限的光通信系统中特别有利。
