A Novel Hybrid Channel DWDM Demultiplexer Using Two Dimensional Photonic Crystals Meeting ITU Standards

Balaji, V. R.; Murugan, M.; Robinson, S.; Hegde, Gopalkrishna

doi:10.1007/s12633-020-00902-7

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…Topological photonics provides a new method of light field regulation and photon control [1][2][3], and its topological edge states can realize the propagation of photon immunity to material impurity defects [4][5][6]. Various photonic crystal structures and schemes have been extensively reported on, such as two-dimensional (2D) photonic crystals [7][8][9][10], 3D photonic crystals [11][12][13][14][15], ring resonators [16][17][18][19][20], metamaterials and metasurfaces [21][22][23][24][25], optical waveguides [26][27][28][29], plasma nanoparticles [30], etc. Recently, topological structures and edge states transmission have been widely studied based on photonic topological insulators.…”

Section: Introductionmentioning

confidence: 99%

Topological Edge States on Different Domain Walls of Two Opposed Helical Waveguide Arrays

Wang,

Shi,

et al. 2023

Photonics

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Floquet topological insulators (FTIs) have richer topological properties than static systems. In this work, we designed different domain wall (DW) structures consisting of a Floquet photonic lattice with opposite helical directions. We investigated the existence and types of edge states in three shared coupling structures and the impact of these shared coupling structures on edge states. When two opposite helical lattices share a straight waveguide array coupling, the edge states are localized on the straight waveguide. When two opposite helical lattices share a clockwise (or anticlockwise) helical waveguide array coupling, the DWs consist of zigzag and bearded edges, but the positions of the zigzag and bearded edges of the shared clockwise waveguide array are different from those of the shared anticlockwise waveguide array. The slope and transmission rate of the edge states both vary with the degree of coupling between the shared waveguides. The characteristics of these edge states, such as transmission speed and band gap width, are also affected by the incidence angle, modulation phase factor, and helical radii, and the methods for controlling the edge states in different shared coupling structures are provided. This will help deepen our understanding of how topological structures influence the electronic and photonic properties of materials. This could also lead to combining topology with metasurface-based structured light, which would highlight many novel properties with great application potential for various fields, such as imaging, metrology, communication, quantum information processing, and light–matter interaction.

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Section: Introductionmentioning

confidence: 99%

Topological Edge States on Different Domain Walls of Two Opposed Helical Waveguide Arrays

Wang,

Shi,

et al. 2023

Photonics

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“…To construct ultra-compact optical DEMUXs, the structures should be able to control the propagation of light waves inside very small space and waveguides [16][17][18]. Due to their small size, excellent performance in optical sensors, high-speed data processing and optical networks, photonic crystals (PhCs) have provided new opportunities for designing all-optical devices required for realizing all the integrated optical circuits, communication networks and data processing systems [19][20][21][22]. Photonic crystals are composed of alternating layers of insulating materials.…”

Section: Introductionmentioning

confidence: 99%

Improved Low Crosstalk, High Transmission and Quality Factor Eight Channel Demultiplexer Based on Photonic Crystal

Azadi

Mohammadi

Olyaee

et al. 2022

Preprint

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Due to the importance of all-optical demultiplexers (DEMUXs) in optical communication networks, this study aims to design and simulate a novel type of DEMUX using 2D photonic crystals (2D-PhCs). The proposed structure consists of one input waveguide and eight output channels considering linear and point defects. To design this DEMUX, silicon dielectric rods with the refractive index of 3.45 are employed in the air background, the radius of which is equal to R=0.21Ʌ (Ʌ = 0.522µm) where Ʌ is the lattice constant. The photonic band gap (PBG) and output spectrum of the structure are analyzed by the plane wave expansion (PWE) and finite-difference time-domain (FDTD) methods, respectively. The simulation results indicate the average quality factor and transmission efficiency are 3,602 and 98%, respectively, and inter-channel crosstalk ranges from -60.5 to -25.5 dB.

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“…In order to design and investigate various optical devices, the PhC will represent the ideal characteristic base for this research. Among these optical devices, we note: circulators [5][6], optical lters [7][8][9], demultiplexers [10], power separators [11] sensors [12]. PhCs have been proven to detect gas [13], pressure "P" [14], refractive index "n" [15], chemicals [16,17], high temperature "T" [18], and many other applications.…”

Section: Introductionmentioning

confidence: 99%

Study of the Modeling of a Photonic Crystal Structure using COMSOL for the Design of a Temperature Sensor

Ghoumazi¹

2022

Preprint

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in this paper, we present a design of a two-dimensional photonic crystal-based temperature sensor (PhCs_2D). It is designed to detect temperature based on the effective modulation of the refractive index of silicon (n_Si). This temperature is monitored by the sensor for values ranging from T = 0°C to °T = 68°C. To analyze the detection principle, this two-dimensional square lattice structure is based on a Photonic Crystal Ring Resonator with a Swiss Cross in the middle (PCRR). The resonator is wedged between two parallel waveguides in a square lattice based on silicon rods immersed in the air, hence the refractive index equal to 3.46. This resonator has been studied as a promising solution due to the deformation, the extreme sensitivity as well as the variation of the position of the rods or cavities within the PhC resonators. It plays a relevant role in the detection of different temperature levels (T) over a wide dynamic range. We investigate the propagation and transmission of this structure that opens an optical channel drop filter (CDF) and the study is extended for tuning the channel filter (CDF) wavelength with temperature. The band diagram is analyzed and the transmission characteristics are obtained using plane wave expansion (PWE) and finite element method (F.E.M) respectively. This method evaluates the functional parameters of the sensor such as: resonance wavelength (λ_res), quality factor (Q), dynamic range, transmission efficiency and sensitivity (S). Our results show a resonance wavelength shift of the PCRR that increases linearly with increasing temperature. In this work, shift is used for sensor application. By F.E.M simulation under COMSOL software, we were able to obtain a resonance wavelength at 1640nm, a quality factor at 410 and a sensitivity of 370.6 pm/℃. The exceptional sensing capability makes PhC resonators a promising opto-mechanical sensing element to be integrated into various transducers for temperature sensing applications.

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A Novel Hybrid Channel DWDM Demultiplexer Using Two Dimensional Photonic Crystals Meeting ITU Standards

Cited by 11 publications

References 37 publications

Topological Edge States on Different Domain Walls of Two Opposed Helical Waveguide Arrays

Topological Edge States on Different Domain Walls of Two Opposed Helical Waveguide Arrays

Improved Low Crosstalk, High Transmission and Quality Factor Eight Channel Demultiplexer Based on Photonic Crystal

Study of the Modeling of a Photonic Crystal Structure using COMSOL for the Design of a Temperature Sensor

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