Improving field localization and figure-of-merit value in plasmonic structures via path-interference effect
SUPERLATTICES AND MICROSTRUCTURES, cilt.133, 2019 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 133
- Basım Tarihi: 2019
- Doi Numarası: 10.1016/j.spmi.2019.106218
- Dergi Adı: SUPERLATTICES AND MICROSTRUCTURES
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Atatürk Üniversitesi Adresli: Hayır
Özet
We present here an ultra-intense field localization at both on-resonant and off-resonant wave-lengths via path interference effect in nanoscale Au Bow-tie structure with single molecule coupling. First, the physics behind the Au Bow-tie with single molecule interaction is explained. Then, path-interference effect is obtained through analysis and some simulations performed with 3D Maxwell Solver (MNPBEM) in MATLAB. The coupling yields ultra-narrow resonances due to path-interference, which are very sensitive to changes into refractive index of surrounding medium. The figure-of-merit for the proposed structures is also calculated and it is demonstrated that much higher values can be obtained compared to conventional plasmonic sensors.