Structure Tuned, High Transmission 180$^{\circ}$ Waveguide Bend in 2-D Planar Photonic Crystal

Tee, D. C.; Shee, Yu Gang; Tamchek, N.; Adikan, Faisal Rafiq Mahamd

doi:10.1109/lpt.2013.2266893

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…2 shows the layout of the proposed flexible Drop Hole (DH) structural defect. We have previously reported the application of DH in designing an efficient 1 Â 3 PhC power splitter [14] and an ultra-compact 180 (U-turn) PhC bend [15] by using 2-D Finite Difference Time Domain (FDTD) method. Compared to our published work on 180 waveguide bend [15], this research on 120 waveguide bend is performed using 3-D FDTD method with detailed analysis based on the band diagram.…”

Section: Phcw Bend Designmentioning

confidence: 99%

High-Transmission-Efficiency 120 <inline-formula> <tex-math notation="TeX">$^{\circ}$</tex-math></inline-formula> Photonic Crystal Waveguide Bend by Using Flexible Structural Defects

et al. 2014

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We numerically studied a high-output-transmission-efficiency low-reflection-loss 120 photonic crystal (PhC) waveguide bend based on a PhC slab with triangular-lattice air holes. The desired high output transmission efficiency was achieved by introducing flexible structural defects into the bend region of the waveguide. Simulation results obtained using a 3-D finite-difference time-domain method indicated that normalized output transmission as high as 94.3% and negligible normalized reflection loss of 0.1% were obtained at the 1550-nm optical wavelength. Furthermore, the normalized output transmission was more than 90% within the entire optical C-band. In addition, sensitivity of the design parameters of the structural defect was studied to understand the tolerance in the fabrication error, while maintaining high output transmission efficiency.

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Section: Phcw Bend Designmentioning

confidence: 99%

High-Transmission-Efficiency 120 <inline-formula> <tex-math notation="TeX">$^{\circ}$</tex-math></inline-formula> Photonic Crystal Waveguide Bend by Using Flexible Structural Defects

et al. 2014

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“…In that design, the desired power splitting ratio was achieved by altering the wedge angle at the junction area of the power splitter. Consequently, wedge-type defects were also introduced in the structure of PhC bends [19,20] to improve their transmittance. Tee et al also used this technique to design a cascaded 1 × 3 PhC power splitter based on asymmetric structural defects [21].…”

Section: Introductionmentioning

confidence: 99%

Design of adjustable T-shaped and Y-shaped photonic crystal power splitters for TM and TE polarizations

Danaie¹,

Nasirifar²,

Dideban³

2017

Turk J Elec Eng & Comp Sci

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Abstract:In this paper, new topologies for realization of photonic crystal optical power splitters for TE and TM modes are proposed. The presented structures can be used for dividing input power with a desired ratio to output ports. The central input wavelength is designed for 1550 nm. To obtain wide-bandwidth power splitters for TE and TM modes, modified Y-shaped and T-shaped photonic crystal junctions are used. A triangular lattice of air holes and a square lattice of rods are used for Y-shaped and T-shaped platforms, respectively. For analyzing these structures, plane wave expansion and finite difference time domain methods are used. Simulation results show that the T-shaped splitter has a bandwidth equal to 51 nm, while the bandwidth of the Y-shaped structure is 126 nm. One of the advantages of the presented topologies is that the power share directed towards each output port can be determined by changing the radii of some specified rods and holes in their structures. For the designer to calculate the optimum radii of the holes based on his desired power ratio, some formulas are presented. Compared to the tunable power splitters based on directional couplers, this method provides much wider bandwidth and a more linear power ratio function.

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Design optimization of a low-loss and wide-band sharp 120° waveguide bend in 2D photonic crystals

Yuan

Yang

Shi

et al. 2016

Optics Communications

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Structure Tuned, High Transmission 180$^{\circ}$ Waveguide Bend in 2-D Planar Photonic Crystal

Cited by 7 publications

References 18 publications

High-Transmission-Efficiency 120 <inline-formula> <tex-math notation="TeX">$^{\circ}$</tex-math></inline-formula> Photonic Crystal Waveguide Bend by Using Flexible Structural Defects

High-Transmission-Efficiency 120 <inline-formula> <tex-math notation="TeX">$^{\circ}$</tex-math></inline-formula> Photonic Crystal Waveguide Bend by Using Flexible Structural Defects

Design of adjustable T-shaped and Y-shaped photonic crystal power splitters for TM and TE polarizations

Design optimization of a low-loss and wide-band sharp 120° waveguide bend in 2D photonic crystals

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