Electromagnetically Induced Transparency (EIT) Like Transmission Based on 3 × 3 Cascaded Multimode Interference Resonators

• Main Author: Le, Trung Thanh
• Other Authors: Khoa Quốc tế, ĐHQGHN
• Format: Article
• Language: English
• Published: MDPI 2020
• Subjects: optical microring resonator; electromagnetically induced transparency (EIT); multimode interference (MMI); transfer matrix method (TMM); finite difference time difference (FDTD); beam propagation method (BPM)
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/89412
• Institution: Vietnam National University, Hanoi

We propose a method for generating the electromagnetically induced transparency (EIT) like-transmission by using microring resonator based on cascaded 3 × 3 multimode interference (MMI) structures. Based on the Fano resonance unit created from a 3 × 3 MMI coupler with a feedback waveguide, two schemes of two coupled Fano resonator unit (FRU) are investigated to generate the EIT like transmission. The theoretical and numerical analysis based on the coupled mode theory and transfer matrix is used for the designs. Our proposed structure has advantages of compactness and ease of fabrication. We use silicon waveguide for the design of the whole device so it is compatible with the existing Complementary Metal-Oxide-Semiconductor (CMOS) circuitry foundry. The fabrication tolerance and design parameters are also investigated in this study