Numerical Study of Integrated Micro Ring Resonator

Abstract

This thesis introduces three main research projects completed by Dachuan Wu. All the study are based on numerical simulation method. This first two are based on integrated ring resonator, a novel, ultra-small size, and widely used component in the field of photonics, telecommunications, and sensing technology. Firstly, a nano-size particles position sensor is proposed. With two resonators placed on a chip, the rough position of dust particles can be obtained. An original designed parallel two rings structure and an improved cascaded double ring structure are both described. Secondly, a plasmonic hydrogen sensor is proposed, with the coating of a layer of hydrogen sensitive material, the ring resonator gain the ability to detect hydrogen. The coating proportion and layer width of coated layer are investigated. The third project is an attempt to design a wideband reflector with easy fabrication capability based on high contrast grating (HCG) subwavelength grating structure. However, the results show evidence of the impossibility of this design. All the results are based on Finite Difference Time Domain (FDTD) simulation method in electromagnetism. The detailed algorithm of FDTD method is also introduced. The entire thesis is structured as following: 1, introduction of ring resonator; 2, particle position sensor; 3, hydrogen sensor; 4, wideband reflector; 5, and introduction of FDTD method;