Design and Optimization of an Al Doped ZnO in Si-Slot for Gas Sensing

Bhattacharjee, Ritapa; Kejalakshmy, N.; Rahman, B. M. A.

doi:10.1109/jphot.2018.2849383

Cited by 4 publications

(2 citation statements)

References 24 publications

(26 reference statements)

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“…We ran the SERS simulation over 1 million time steps corresponding to more than 2000 round trips through the structure and no numerical instabilities has been observed. However, some other weaknesses of numerical analysis such as inconsideration of lossy medium to find the fundamental mode's equivalent refractive index [31,32] should be studied and is suggested as the extension of the present work.…”

Section: Methods Mpumentioning

confidence: 99%

Faster and More Accurate Time Domain Electromagnetic Simulation Using Space Transformation

2020

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A novel finite difference time domain (FDTD) method based on space transformations is developed that overcomes the inherent obstacles of the conventional FDTD algorithm in a spatially complex domain. Our method leads to an adaptive mesh for the investigated structure based on its geometrical shape without adding additional numerical problems such as late-time instability. In this method, mesh boundaries can follow arbitrary geometrical shapes precisely meaning that discretization errors are minimized. Such errors can be considerable when dealing with large material differences or boundary conditions within the simulation domain. Different meshing and transformation techniques for a variety of different scenarios are presented. We show how boundaries discontinuity can be handled using our method without resulting artificial singularities or zeros. Unlike previous works no dispersive medium has been used so the simulation speed is similar to the standard FDTD method. The usability and superiority of this method in terms of simulation run time and accuracy are shown through a couple of scattering and plasmonic problems. Also, the result of any simulations are validated using finite element method.

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Section: Methods Mpumentioning

confidence: 99%

Faster and More Accurate Time Domain Electromagnetic Simulation Using Space Transformation

2020

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“…In the beginning the method was applied for mechanical structural analysis, in Civil [2] and Aeronautical Engineering [3]. The FEM is, in our days, one of the most important numerical methods used in simulation in different areas [4], namely in biomedical applications [5], [6], in the optimization [7], design and simulation of electrical, electronic and optical devices [8]. The importance of the method is mainly due to its ability to handle problems with complicated geometries and irregular boundaries.…”

Section: Introductionmentioning

confidence: 99%

A New Hybrid Finite Element Method: Electromagnetic Propagation in Bent Waveguides

2020

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A new hybrid finite element method (HFEM) was developed, using basis functions of first and second order, to analyse the electromagnetic wave propagation in three types of waveguides: disk waveguides, ring waveguides and cylindrical waveguides. For validation purposes, results obtained with the HFEM method were compared with those obtained with a recursive finite element method (RFEM) and with two different analytical methods. The domain discretization effect on the results of the new HFEM method was examined using either a uniform distribution of nodes or a Delaunay distribution method. The results show that the Delaunay method, used in the mesh definition, is important, not only to assure the reliability of the method but also to significantly reduce the computation time and memory consumption. Also, the influence of the distance between the fictitious boundary and the waveguide core was analysed showing an important effect on the result numerical accuracy. In conclusion, results show that the new hybrid finite element method presented has a significant advantage on calculation time over the recursive finite element method.

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Efficient four-wave mixing wavelength conversion in a hybrid silicon slot and polymer microring resonator

Hong

Rokumyo²,

Mao³

et al. 2022

Opt. Express

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We present a silicon slot microring resonator for efficient frequency conversion via four-wave mixing (FWM). The slot consists of a narrow silicon waveguide pair with a gap of 80 nm, which is filled with a nonlinear optical polymer. The group velocity dispersion for the microring is controlled by engineering the geometry of the slot structure. Because of the large buildup factor of the slot microring, an FWM conversion efficiency of −27.4 dB is achieved with an optical pump power of less than 1.0 mW. From the measured power dependence of FWM generation, a nonlinear refractive index coefficient of 1.31 × 10−17 m2 W−1 is obtained at a wavelength of 1562 nm. This work presents a hybrid silicon slot and polymer microring as a potential nonlinear device for applications in integrated photonic devices.

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Design and Optimization of an Al Doped ZnO in Si-Slot for Gas Sensing

Cited by 4 publications

References 24 publications

Faster and More Accurate Time Domain Electromagnetic Simulation Using Space Transformation

Faster and More Accurate Time Domain Electromagnetic Simulation Using Space Transformation

A New Hybrid Finite Element Method: Electromagnetic Propagation in Bent Waveguides

Efficient four-wave mixing wavelength conversion in a hybrid silicon slot and polymer microring resonator

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