Acta Photonica Sinica, Volume. 42, Issue 12, 1464(2013)
Electromanetic Field Analysis of Slotwaveguide with High Refractive Index Difference
The slotwaveguide is widely used in the integrated optical waveguide devices and systems. Therefore it is very important to develop a practical theoretical method and model for guiding the design of such devices and systems. By means of analyzing the physical mechanism of the slotwaveguide and the modes transmitted in it, a novel theoretical model was built to describe the electric field distribution in the slotwaveguide. The novel theoretical model was developed based on the conditions of regarding the nanowaveguides and the slot region as a whole system and of introducing both the guided wave and the radiating wave in solving the Helmholtz equation. In order to verify the proposed theoretical model, the theoretical results were compared with RSoft simulation results, a practical optimum design reported by other researchers, and a theoretical method developed by other researchers. The comparison results show that the proposed theoretical model has higher accuracy in describing the slotwaveguides. Finally, the significant condition of the proposed theoretical model was analyzed and determined. Take a typical SOI slotwaveguide with the nanowaveguide size of 180 nm×300 nm as an example, the critical slot width worked out at 96.2 nm.
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LI Tang, WANG Dongxu, QIAN Ruyi, CHENG Siqi, GU Ruirui, LE Zichun. Electromanetic Field Analysis of Slotwaveguide with High Refractive Index Difference[J]. Acta Photonica Sinica, 2013, 42(12): 1464
Received: May. 20, 2013
Accepted: --
Published Online: Dec. 16, 2013
The Author Email: Tang LI (vicky848@163.com)