Optics and Photonics Society of Iran

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

---

In this paper we investigate a compact double and single micro-ring resonator sensor based on a hybrid plasmonic and photonic waveguides on a silicon-on-insulator substrate. The hybrid waveguide is consisting of a metal-gap-silicon structure, where the optical energy is greatly enhanced in a narrow gap. We use the finite-difference time-domain (FDTD) method to numerically simulate the device optical characteristics as an optical sensor. The sensitivity of the proposed hybrid double micro-ring resonator is large due to the large overlap with the upper-environment sensing medium. The sensitivity of the device depends on the presence or absence of a metal disk and can be designed based on the application of the sensor. The best quality factor of 4874.65 is obtained for double ring resonator with 4.2 µm and 3.8 µm ring radius in presence of gold discs. The main benefit of the proposed hybrid micro-ring resonator sensors is high sensitivity. This sensor can be potentially integrated in an array to form lab-on-chip biochemical sensing devices.

Keywords: single ring resonator, double ring resonator, quality factor, sensitivity, transmission curve

Full-Text [PDF 1166 kb]   (457 Downloads)    

---