نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی برق-الکترونیک،دانشکده مهندسی برق و کامپیوتر، دانشگاه تبریز، تبریز، ایران
2 گروه مهندسی برق- الکترونیک، دانشکده مهندسی برق و کامپیوتر، دانشگاه تبریز، تبریز، ایران
3 گروه مهندسی برق، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران
4 گروه مهندسی برق-مخابرات، دانشکده مهندسی برق و کامپیوتر، دانشگاه تبریز، تبریز، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Nowadays, biosensors based on whispering gallery mode play a special role in optical sensors due to their simple theory and suitable optical response for single-molecule and single-virus detection. In the meantime, micro-disk resonators have received attention because of their low fabrication cost, high selectivity, and accuracy. In this work, we study the effects of the waveguide's shape and curvature on the micro-disk sensor's optical response based on whispering waves. The distance between waveguide and resonator effects on the sensor parameters has been investigated. Finally, the most suitable distance has been selected for the sensor's optimal performance. By improving the structure, the sensitivity for the first and second modes with a 180° curve to 50 nm/RIU and 52 nm/RIU and a 90° curve to 47nm/RIU and 48nm/RIU, respectively. The simulation results show that the greater the curvature of the waveguide, the longer the optical path length. Also, the sensor's performance is improved. This sensor can be used to detect single molecular particles in the medical and environmental fields.
کلیدواژهها [English]