Photonic crystal embedded waveguide for compact C-band band-pass filter

Nawi, Mohd Nuriman; Rashid, Nurulhani Diana; Berhanuddin, Dilla Duryha; Majlis, Burhanuddin Yeop; Mahdi, Mohd Adzir; Zain, Ahmad Rifqi Md

doi:10.1109/smelec.2018.8481239

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…However, the square shape will abrupt changes in the flow of light in the structure and light will get reflected and scattered to give low transmission. 24 The 2D PhC is designed with circular holes etched in the GaN layer having a triangular lattice, 24 where the hole diameter d is 106 nm and the lattice constant a is 157 nm while the hole displacement was shifted from hole B to A. We varied the design with three different hole displacement values at a time for a lattice constant between A and B (132, 142, and 152 nm).…”

Section: Methodsmentioning

confidence: 99%

“…However, the square shape will abrupt changes in the flow of light in the structure and light will get reflected and scattered to give low transmission. 24…”

Section: Methodsmentioning

confidence: 99%

“…Normally, a buffer layer has to be applied to reduce the strain on the epitaxial GaN layer, and the influence of both materials (GaN and AlN) may increase the high quality (Q) factor of PhC cavities. [23][24][25][26] The finite-difference time-domain (FDTD) method 27 is a numerical method used to solve the Maxwell equation and simulate a space of theoretically infinite. Time-domain computations allow for an unambiguous characterization of important properties of microcavities, such as bandgap features, resonant-defect mode dynamics, and far-field pattern properties of crystal modes.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of 2D GaN photonic crystal based on hole displacement for L3 cavity

Zamani

Nawi

Berhanuddin

et al. 2020

Nanomaterials and Nanotechnology

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In this article, we report modeling, simulation, and analysis of shifting 2D photonic crystal cavity side holes in GaN-AlN-sapphire layered structure. The design was simulated with Lumerical finite-difference time-domain. A lattice constant a, 157 nm, and a hole diameter d, 106 nm, were used in the design. The cavities are based on L3, which we demonstrated by simply shifting two holes away from a line cavity with distances of 132, 142, and 152 nm, respectively. The highest quality factor, Q, value achieved is 2.25 × 104 at 152-nm cavity distance.

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Section: Methodsmentioning

confidence: 99%

“…However, the square shape will abrupt changes in the flow of light in the structure and light will get reflected and scattered to give low transmission. 24…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of 2D GaN photonic crystal based on hole displacement for L3 cavity

Zamani

Nawi

Berhanuddin

et al. 2020

Nanomaterials and Nanotechnology

Self Cite

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“…The control and management of light propagation is a significant research topic in optics and photonics. The ability to control light propagation has facilitated the design of various photonic devices, including high-sensitivity sensors [1][2][3][4][5][6]. Among these designs, photonic crystals are preferred for high-sensitivity sensor applications due to their unique optical properties and engineering advantages.…”

Section: Introductionmentioning

confidence: 99%

Design of classification-based photonic crystal sensor for chemical substance detection

Zeydan Çelen,

Karlik

2024

Machine Learning in Photonics

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Photonic crystals are periodic structures with refractive index changes in one, two, or three dimensions. Due to their unique design, these crystals exhibit a photonic band gap that allows light to propagate through the structure at specific frequencies and be reflected at other frequencies. In regions where light cannot pass, known as the forbidden band gap, certain photonic states are created by deliberately creating defects in the crystal. These are called defect modes. By analyzing the dispersion curve of the defect mode, valuable information can be obtained about the behavior of light within the structure. This information includes the group velocity of the light, group velocity dispersion, and sensor sensitivity.This study proposes a two-dimensional square lattice symmetry photonic crystal design. This design arranges dielectric rods on a low refractive index material according to the square lattice symmetry. The dispersion curve of the defect mode obtained through the created line defect in the structure is investigated, and the change in group velocity of the propagating light within the structure is obtained. Increasing the sensor sensitivity is achieved by reducing the group velocity of the propagating light. Classification-based machine learning methods are employed to detect chemical substances, and the performance rates of these methods are compared for chemical substance detection.

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Green’s function application to photonic crystal waveguides analysis

Mitelman

Shabunin

2020

International Conference of Numerical Analysis and Applied Mathematics Icnaam 2019

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The paper considers application of the Green's tensor functions to analysis of the multilayer magneto-dielectric structures in relation to photonic crystals of the microwave range. The solution of the problem of electromagnetic wave propagation in rectangular and flat waveguides, as well as in unlimited space is presented. Efficiency of application of the Green's functions to calculation of transmission coefficients through the regular and perturbed structure of a photonic crystal is shown. It was proposed to solve the problem of diffraction of electromagnetic waves by the layered structures as the problem of equivalent electric and magnetic currents radiation. These currents are determined on the illuminated layered media surface by the Equivalence Theorem. The magnitude of the current is related to the electric field intensity, and, also, the direction of the incident wave is defined by the current phase distribution. The radiation of the equivalent currents behind the layered structure is considered as a transmitted wave. Radiation of these currents in the same region is treated as a reflected wave. So, transmission and reflection coefficients are defined. Application of this approach to analysis of the periodic structures of the photonic crystals is shown in this paper.

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Photonic crystal embedded waveguide for compact C-band band-pass filter

Cited by 4 publications

References 11 publications

Design of 2D GaN photonic crystal based on hole displacement for L3 cavity

Design of 2D GaN photonic crystal based on hole displacement for L3 cavity

Design of classification-based photonic crystal sensor for chemical substance detection

Green’s function application to photonic crystal waveguides analysis

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