A novel proposal for optical decoder switch based on photonic crystal ring resonators

Mehdizadeh, Farhad; Soroosh, Mohammad; Alipour-Banaei, Hamed

doi:10.1007/s11082-015-0313-0

Cited by 95 publications

(25 citation statements)

References 24 publications

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“…PCs are structures composed of periodic layers with different dielectric constants and demonstrate useful characteristics such as photonic band gap (PBG) [3], slow light regime [5][6][7], and self-collimation [8][9][10][11]. Because of their compact size and the aforementioned properties, they are promising candidates in realizing all-optical devices such as optical waveguides [10][11][12], filters [13][14][15][16][17][18], demultiplexers [19][20][21][22][23][24][25], switches [26][27][28][29][30], logic gates [31][32][33][34][35][36], encoders [37][38][39][40][41][42], decoders [43][44][45][46][47][48], and analog-to-digital converters …”

Section: Introductionmentioning

confidence: 99%

All-Optical Ultra-Fast Graphene-Photonic Crystal Switch

et al. 2019

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In this paper, an all-optical photonic crystal-based switch containing a graphene resonant ring has been presented. The structure has been composed of 15 × 15 silicon rods for a fundamental lattice. Then, a resonant ring including 9 thick silicon rods and 24 graphene-SiO2 rods was placed between two waveguides. The thick rods with a radius of 0.41a in the form of a 3 × 3 lattice were placed at the center of the ring. Graphene-SiO2 rods with a radius of 0.2a were assumed around the thick rods. These rods were made of the graphene monolayers which were separated by SiO2 disks. The size of the structure was about 70 µm2 that was more compact than other works. Furthermore, the rise and fall times were obtained by 0.3 ps and 0.4 ps, respectively, which were less than other reports. Besides, the amount of the contrast ratio (the difference between the margin values for logics 1 and 0) for the proposed structure was calculated by about 82%. The correct switching operation, compactness, and ultra-fast response, as well as the high contrast ratio, make the presented switch for optical integrated circuits.

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Section: Introductionmentioning

confidence: 99%

All-Optical Ultra-Fast Graphene-Photonic Crystal Switch

et al. 2019

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“…They prepare a proper medium to control the flow of light. Due to their attractive effects, including the photonic bandgap (PBG) [5], scalability [6], slow light mode [7], and self-collimation [8], many attempts have been made for designing photonic crystal-based devices, such as decoders [9][10][11][12][13][14][15][16], encoders [17][18][19], analog-to-digital converters [20][21][22], adders [23][24][25], and flip-flops [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Optical decoders are known as the main blocks in optical integrated circuits. Some photonic crystal-based structures have been provided to all-optical 2-to-4 decoders [9][10][11][12][13][14][15][16]. Alipour et al presented a square array of 29 and 22 rods, along with the x and z directions, where the lattice constant was equal to 825 nm [9].…”

Section: Introductionmentioning

confidence: 99%

Improving the Performance of 2-To-4 Optical Decoders Based on Photonic Crystal Structures

2019

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In this study, a novel, two-dimensional photonic crystal-based structure for the 2-to-4 optical decoder is presented. The structure consists of 23 rows and 14 columns of chalcogenide rods that are arranged in a square lattice with a spatial periodicity of 530 nm. The bias and the optical signals are guided toward the main waveguide through the three waveguides. Two unequal powers are applied to the input ports to approach the different intensities proportional to four working states into the main waveguide. Four cavities including the nonlinear rods are in response to drop the optical waves toward the output ports. To calculate the band diagram and the spatial distribution of the electric and magnetic fields, the plane wave expansion and the finite difference time domain methods have been used. The delay time of the designed structure is obtained around 220 fs, which is less than one for the previous structures. Furthermore, the gap between the margins for logic 0 and 1 is equal to 83%, which is higher than one for other works. Besides, the area of the structure is reduced to 90 µm2 in comparison to all reported structures. Based on the mentioned results, it seems that an improvement of the performance for 2-to-4 optical decoders has been obtained in this research.

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“…Similarly, two-dimensional (2D) and three-dimensional (3D) PCs are defined when the dielectric constant varies along two and three direction, respectively [1][2][3][4]. PBG property made these artificial structures suitable for designing different optical devices such as filters [5][6][7][8][9][10][11], demultiplexers [12][13][14][15][16][17] switches [18][19][20] and optical logics [18,[21][22][23][24][25][26][27][28]. The optical power splitter or divider is an indispensable component in photonic-integrated circuits which is used in fiber optic networks.…”

Section: Introductionmentioning

confidence: 99%

An Optical Power Divider Based on Two-dimensional Photonic Crystal Structure

Mesri

Alipour-Banaei

2016

Journal of Optical Communications

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In this paper, an optical power divider with one input and four outputs has been proposed in a twodimensional photonic crystal with triangular lattice and simulated using dielectric holes in an air substrate. The dividing properties of the power divider have been numerically simulated and analyzed using the plane wave expansion and finite difference time domain methods. The results show that the transmittance of this divider can be as high as 94.22 % for λ = 1.55 µm; thus, the proposed structure is suitable for wavelength division multiplexing communication systems. Also, due to the small footprint of the proposed structure, this optical power divider is applicable for optical-integrated circuit design.

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A novel proposal for optical decoder switch based on photonic crystal ring resonators

Cited by 95 publications

References 24 publications

All-Optical Ultra-Fast Graphene-Photonic Crystal Switch

All-Optical Ultra-Fast Graphene-Photonic Crystal Switch

Improving the Performance of 2-To-4 Optical Decoders Based on Photonic Crystal Structures

An Optical Power Divider Based on Two-dimensional Photonic Crystal Structure

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