Design of a high efficiency wide-band 60° bend for TE polarization
Source abstract
Abstract
In this paper, a high-efficiency 60° photonic crystal (PC) bend geometry is proposed. The corresponding PC is a two-dimensional triangular lattice of air holes in a dielectric slab. In the proposed bend structure, five additional holes are introduced in the bend. The radii of these holes are changed gradually. Hence the effect of bend discontinuity is decreased and consequently, a wide-band high efficiency bend is obtained. In this structure, the frequency bandwidth for which the transmission coefficient is greater than 0.9 covers 84% of the single-mode bandwidth of the waveguide, while for the best geometry reported in the literature this value does not exceed 56%. For numerical analysis of waveguide bends, the slab PC structure is first replaced by a two-dimensional (2D) PC with an effective refractive index and then, a 2D FDTD method is used to obtain the transmission coefficient of the bend.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Photonic Crystals and Applications · Photonic and Optical Devices · Optical Coatings and Gratings
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Joannopoulos · 1995
2. Semiconductor three-dimensional and two-dimensional photonic crystals and devices10.1109/JQE.2002.1017582 ↗
3. Photonic crystals and micro disk cavities based on GaInAsP–InP system10.1109/2944.640635 ↗
4. Noda · 2003
5. M. Danaie, A.R. Attari, M.M. Mirsalehi, S. Naseh, Neuro-fuzzy optimization of photonic crystal structures, in: Proceedings of the IEEE International Conference on Computer as a Tool (IEEE EUROCON’07), Warsaw, Poland, 2007, pp. 1223–1226.10.1109/EURCON.2007.4400535 ↗
6. M. Danaie, A.R. Attari, M.M. Mirsalehi, S. Naseh, Optimization of two-dimensional photonic crystal waveguides for TE and TM polarizations, J. Optica Applicata, in press.
7. High transmission through sharp bends in photonic crystal waveguides10.1103/PhysRevLett.77.3787 ↗
8. Improved transmission for 60 of photonic crystal waveguide bends
9. Optimization of bandwidth in 60° photonic crystal waveguide bends10.1016/j.optcom.2004.12.003 ↗
10. Waveguide and waveguide bend in two dimensional photonic crystal slabs10.1103/PhysRevB.62.4488 ↗
11. Optimization of a 60° waveguide bend in InP-based 2D planar photonic crystals10.1364/JOSAB.25.000067 ↗
12. Optimization of photonic crystal 60° waveguide bends for broadband and slow-light transmission10.1007/s00340-006-2507-4 ↗
13. Arbitrary angle waveguide bends in two-dimensional photonic crystals10.1016/j.optcom.2008.04.049 ↗
14. Study of transmission properties for waveguide bends by use of a circular photonic crystal10.1016/j.physleta.2005.04.040 ↗
15. Wider bandwidth with high transmission through waveguide bends in two dimensional photonic crystal slabs10.1063/1.1458529 ↗
16. M. Khatibi, M. Mirsalehi, A. Attari, Wider bandwidth and higher transmission for 60° photonic crystal waveguide bends, in: Proceedings of the 15th Iranian Conference on Electrical Engineering, Tehran, Iran, 2007, pp. 6–10.
17. Room temperature photonic crystal defect lasers at near-infrared wavelengths in InGaAsP10.1109/50.802998 ↗
18. Efficient couplers for photonic crystal waveguides10.1016/j.optcom.2006.02.052 ↗
19. Experimental verification of numerically optimized photonic crystal injector, Y-splitter, and bend10.1109/JSAC.2005.851169 ↗
20. Slow-light, band-edge waveguides for tunable time delays10.1364/OPEX.13.007145 ↗
21. Low propagation loss of 0.76dB/mm in GaAs based single-line-defect two-dimensional photonic crystal slab waveguides up to 1cm in length10.1364/OPEX.12.001090 ↗
22. Absorbing boundary conditions for FDTD simulations of photonic crystal waveguides10.1109/75.819374 ↗