تقرير
Bound State in the Continuum Supported Asymmetric Dome-shaped Dielectric Metasurface: Crossing and Avoided Crossing of Transmission with Applications
| العنوان: | Bound State in the Continuum Supported Asymmetric Dome-shaped Dielectric Metasurface: Crossing and Avoided Crossing of Transmission with Applications |
|---|---|
| المؤلفون: | Islam, Ohidul, Anik, M. Hussayeen Khan, Shakib, Shakhawat Hossain, Niloy, Nahid Hasan, Talukder, Hriteshwar, Biswas, Shovasis Kumar |
| سنة النشر: | 2023 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Physics - Applied Physics |
| الوصف: | This work examines a symmetry-protected bound state in the continuum (BIC) supported unique all-dielectric dome-shaped metasurface (MS). The simple unit MS is made up of four dome-shaped nanobars of silicon in the top layer and silica glass as the substrate. Two strong transmission dips denoted as an electric dipole (ED) and magnetic dipole (MD) quasi-BIC with a high Q-factor that surpasses the value of 104 are observed after the symmetry between the nanobars is broken by a small angle from their initial position. A crossover between the ED and MD resonances is noticed when the periodicity of the MS is changed in the y direction. In addition, transmission spectra show the avoided-crossing phenomenon of dipole quasi-BIC resonances when the superstrate's refractive index (RI) is reduced from its initial value. Other widely used dielectric materials are additionally employed in dome-shaped nanobars to evaluate their performances in terms of sharpness and near-zero transmission. Moreover, Other forms of symmetry breakdown such as diagonal width and length asymmetry have been investigated for their impact on the Q-factor. Finally, we have demonstrated two significant applications, including refractometric glucose sensing and third harmonic generation (THG). Our dome-shaped MS is roughly 300 times more efficient at generating third harmonics than a flat rectangular silicon film MS. Our proposed BIC and q-BIC-facilitated MS may provide a method for enhancing the functionality of biological sensors, multimodal lasing, optical switches, and nonlinear optics. Comment: 15 pages, 6 figures, 1 table |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.optlastec.2024.110634 |
| URL الوصول: | http://arxiv.org/abs/2310.00422 |
| رقم الأكسشن: | edsarx.2310.00422 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.optlastec.2024.110634 |
|---|