Yanhong Yao, Lü Qieni, Xiaopeng Chen, Mingdi Zhang, Miaomiao Zhang. A Few-Mode Waveguide Structure Based on Kagome Lattice[J]. Laser & Optoelectronics Progress, 2022, 59(3): 0316001
- Laser & Optoelectronics Progress
- Vol. 59, Issue 3, 0316001 (2022)
Fig. 1. Line defect in Kagome lattice, black dot frame is the supercell schematic and inset in the upper left is the Brillouin region
Fig. 2. Simulation results of the line defect in Kagome lattice. (a) TM energy band structure; (b) transmission spectrum
Fig. 3. Steady-state field distribution of beams of different wavelengths and variation of light intensity value with time. (a) λ=3.124 μm; (b) λ=3.75 μm; (c) λ=4.597 μm
Fig. 4. Waveguide based on Kagome lattice. (a) Waveguide structure parameters; (b) relationship between the first band gap width and rc
Fig. 5. Relationship between transverse wave vector frequencies of waveguide mode and rd
Fig. 6. Newly designed Kagome lattice waveguide.(a) New defect structure; (b) relationship between its defect mode frequency and rd
Fig. 7. TM energy band structure of each node in Fig. 6(b). (a) rd=0.06a; (b) rd=0.09a; (c) rd=0.14a; (d) rd=0.18a
Fig. 8. When rd=0.1a, relationship between defect mode frequency and l
Fig. 9. TM band structures of the line defect. (a) Before the movement; (b) after the movement (l=0.5a)
Fig. 10. Relationship between defect mode frequency and r1
Fig. 11. Optimized Kagome lattice. (a) Optimized Kagome line defect structure; (b) transmission spectrum
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