31668

موجبر هيبريدي پلاسمونيك كم تلفات برپايه سيليكون

كارشناسي ارشد

مهندسي برق (مخابرات-ميدان و امواج)

1400

1403/07/03

دكتر محمد خلج اميرحسيني

دكتر امير سامان نورامين

برق

ﻣﻮﺟﺒﺮﻫﺎي ﻧﻮري ﺑﻪ ﻋﻨﻮان اﺟﺰاي اﺳﺎسي در ﺳﯿﺴﺘﻢﻫﺎي ارﺗﺒﺎﻃﺎت ﻧﻮري، نقشي ﺣﯿﺎتي در ﻫﺪاﯾﺖ و ﮐﻨﺘﺮل ﻧﻮر اﯾﻔﺎ ميﮐﻨﻨﺪ. اﯾﻦ ﺳﺎﺧﺘﺎرﻫﺎ ﺑﺎ ﻣﺘﻤﺮﮐﺰ ﮐﺮدن ﻧﻮر در ﻣﺴﯿﺮﻫﺎي ﻣﺸﺨﺺ، ﺗﻠﻔﺎت اﻧﺮژي را ﺑﻪ ﺣﺪاﻗﻞ مي رﺳﺎﻧﻨﺪ و ﮐﺎراﯾﯽ ﺳﯿﺴﺘﻢﻫﺎي ﻧﻮري را ﺑﻬﺒﻮد ميﺑﺨﺸﻨﺪ. از آﻧﺠﺎ ﮐﻪ ﻧﻮر در ﻣﺤﯿﻂﻫﺎي ﻣﺨﺘﻠﻒ ممكن اﺳﺖ ﺑﺎ ﭘﺮاﮐﻨﺪگي و شكست ﻣﻮاﺟﻪ ﺷﻮد، ﻣﻮﺟﺒﺮﻫﺎي ﻧﻮري ﺑﺎ ﻫﺪاﯾﺖ دﻗﯿﻖ ﻧﻮر اﯾﻦ مشكلات را ﮐﺎﻫﺶ مي دﻫﻨﺪ و اﻧﺘﻘﺎل اﻃﻼﻋﺎت با ﺳﺮﻋﺖ ﺑﺎﻻ و ﮐﯿﻔﯿﺖ ﺑﺎﻻ را ممكن ميﺳﺎزﻧﺪ. ﻋﻼوه ﺑﺮ اﯾﻦ، اﺳﺘﻔﺎده از ﻣﻮﺟﺒﺮﻫﺎي ﻧﻮري ﺑﻪ ﻓﺸﺮدهﺳﺎزي اپتيكي كمك ميﮐﻨﺪ و امكان ﺳﺎﺧﺖ ﺳﯿﺴﺘﻢﻫﺎي ﮐﻮچكتر و يكپارچهﺗﺮ را ﻓﺮاﻫﻢ مي نمايد. اين ويژگي ها در ﮐﺎرﺑﺮدﻫﺎي تخصصي ﻣﺎﻧﻨﺪ حسگرﻫﺎي ﻧﻮري، ﻟﯿﺰرﻫﺎ و ﻓﺘﻮنيك سيليكون اﻫﻤﯿﺖ وﯾﮋه اي دارﻧﺪ، ﭼﺮا ﮐﻪ عملكرد دﻗﯿﻖ و ﺑﻬﯿﻨﻪ اﯾﻦ دﺳﺘﮕﺎهﻫﺎ ﺑﻪ ﻫﺪاﯾﺖ ﻣﻮﺛﺮ ﻧﻮر واﺑﺴﺘﻪ اﺳﺖ. در ﻧﻬﺎﯾﺖ، ﻣﻮﺟﺒﺮﻫﺎي ﻧﻮري با كاهش ﻧﻮﯾﺰ و ﺣﻔﻆ ﮐﯿﻔﯿﺖ سيگنال، ﻧﻘﺶ مهمي در ﺗﻮﺳﻌﻪ ﻓﻨﺎوريﻫﺎي ﻧﻮري و ارﺗﺒﺎﻃﺎت ﻣﺪرن اﯾﻔﺎ ميﮐﻨﻨﺪ.در اين ﺗﺤﻘﯿﻖ، ﻣﺎ يك ﻣﻮﺟﺒﺮ ﻧﻮري ﻫﯿﺒﺮﯾﺪي ﭘﻼﺳﻤﻮنيك مثلثي را ﻣﻌﺮفي ميﮐﻨﯿﻢ ﮐﻪ در آن يك ﻧﺎﻧﻮﺳﯿﻢ مثلثي با يك ﻻﯾﻪ SiO2 از يك ﺑﺴﺘﺮ Na ﺟﺪا ﺷﺪه و ﺑﺎ ﺳﺘﻮنﻫﺎﯾﯽ از SiO2 ﺛﺎﺑﺖ ميﺷﻮد. ﺧﻮاص ﻣﻮدﻫﺎي انتشار ﺑﺎ اﺳﺘﻔﺎده از روش اﺟﺰاي ﻣﺤﺪود در ﻃﻮل ﻣﻮج 1550 ﻧﺎﻧﻮﻣﺘﺮ ﻣﻮرد ﺗﺠﺰﯾﻪ و ﺗﺤﻠﯿﻞ ﻗﺮار ﮔﺮﻓﺘﻪاﻧﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن مي‌دﻫﺪ ﮐﻪ ﻣﺴﺎﺣﺖ ﻣﻮد ﻧﺮﻣﺎل شده (3-) ^ 10 × 1.6، ﺷﺎﺧﺺ ﻣﺆﺛﺮ =1.0124، ﻃﻮل اﻧﺘﺸﺎر= 660 ميكروﻣﺘﺮ، و رﻗﻢ ﺷﺎيستگي = 5410 را ﺑﻪ ﻃﻮر ﻫﻤﺰﻣﺎن دارﯾﻢ. ﺑﻪ دﻟﯿﻞ ﺗﻤﺮﮐﺰ ﻣﯿﺪان در ﻧﻮك ﻣﺜﻠﺚ، ﺗﻠﻔﺎت ﮐﻤﺘﺮ، ﻣﺤﺼﻮر ﺷﺪن ﺑﯿﺸﺘﺮ و ﻃﻮل اﻧﺘﺸﺎر ﺑﯿﺸﺘﺮ ﺑﻪ دﺳﺖ آﻣﺪه اﺳﺖ. ﻋﻼوه ﺑﺮ اﯾﻦ، روش ﺳﺎﺧﺖ ﻣﻮﺟﺒﺮ ﭘﯿﺸﻨﻬﺎدي، اراﺋﻪ و ﺑﺤﺚ ﺷﺪه اﺳﺖ. اﯾﻦ ﯾﺎﻓﺘﻪ ﻫﺎ از ﻣﻮﺟﺒﺮﻫﺎي ﻧﻮري ﻫﯿﺒﺮﯾﺪي ﭘﻼﺳﻤﻮنيك مثلثي ﺑﺎﻋﺚ مي شود ﮐﻪ آﻧﻬﺎ ﺑﻪ ﻃﻮر ﮔﺴﺘﺮده در ﺑﺴﯿﺎري از زﻣﯿﻨﻪ ﻫﺎ از ﺟﻤﻠﻪ ارﺗﺒﺎﻃﺎت راه دور، حسگرﻫﺎ، ﻟﯿﺰرﻫﺎ و ﻓﻨﺎوري ﻫﺎي ﻧﻮري ﻣﻮرد اﺳﺘﻔﺎده ﻗﺮار ﮔﯿﺮﻧﺪ.

1403/09/13

Low-loss Silicon-based Plasmonic Hybrid Waveguide

1/1/1900 12:00:00 AM

Optical waveguides play a crucial role as fundamental components in optical communication systems, where they are essential for guiding and controlling light. These structures minimize energy losses by focusing light along specific paths, thereby enhancing the performance of optical systems. Since light may encounter scattering and refraction in various environments, optical waveguides reduce these issues by precisely directing light, enabling high-speed and high-quality information transmission. Furthermore, the use of optical waveguides contributes to the miniaturization of optical systems, allowing for the construction of smaller and more integrated systems. These features are particularly significant in specialized applications such as optical sensors, lasers, and silicon photonics, as the precise and optimal performance of these devices relies on effective light guiding. Ultimately, optical waveguides play a vital role in advancing optical technologies and modern communications by reducing noise and preserving signal quality. In this research, we introduce a triangular hybrid plasmonic optical waveguide, where a triangular nanowire is separated from a Na substrate by a layer of SiO2 and fixed with columns of SiO2. The properties of the propagation modes have been analyzed using the finite element method at a wavelength of 1550 nm. The results indicate that we have a normalized mode area of 1.6 × 10−3, an effective index of 1.0124, a propagation length of 660µm, and a figure of merit of 5410 simultaneously. Due to the field concentration at the tip of the triangle, lower loss, higher confinement, and longer propagation length have been achieved. Additionally, the fabrication method of the proposed waveguide has been presented and discussed. These findings make triangular hybrid plasmonic optical waveguides widely applicable in various fields, including telecommunications, sensors, lasers, and optical technologies.

ﭘﻼﺳﻤﻮن سطحي , ﻣﻮﺟﺒﺮﻧﻮري , ﻣﻮﺟﺒﺮﻧﻮري ﭘﻼﺳﻤﻮنيك , ﻣﺤﺪودﺳﺎزي ﻧﻮر , رﻗﻢ ﺷﺎيستگي

Surface Plasmon , Optical Waveguide , Plasmonic Optical Waveguide , Light Confinement , Figure of Merit

Hamed Firouzbakht

Mohammad khalaj Amirhosseini