An optical demultiplexer based on photonic crystal ring resonators

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

doi:10.1016/j.ijleo.2016.06.086

Cited by 74 publications

(11 citation statements)

References 39 publications

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“…Thus, waveguides in a PhC can be created by removing one or more rows of dielectric rods. PhC-based structures are excellent choices for designing many types of optical devices such as optical filters [3][4][5][6][7][8], PhC fibers [9][10][11][12][13][14][15][16][17][18], multiplexers and demultiplexers [19][20][21][22][23][24][25][26], encoders and decoders [27][28][29][30], switches [31][32][33][34][35][36], logic gates [37][38][39][40][41][42], analog to digital converters (ADCs) [43][44][45][46][47][48][49], and sensors [50]…”

Section: Photonic Sensorsmentioning

confidence: 99%

A Novel All-Optical Sensor Design Based on a Tunable Resonant Nanocavity in Photonic Crystal Microstructure Applicable in MEMS Accelerometers

et al. 2020

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In view of the large scientific and technical interest in the MEMS accelerometer sensor and the limitations of capacitive, resistive piezo, and piezoelectric methods, we focus on the measurement of the seismic mass displacement using a novel design of the all-optical sensor (AOS). The proposed AOS consists of two waveguides and a ring resonator in a two-dimensional rod-based photonic crystal (PhC) microstructure, and a holder which connects the central rod of a nanocavity to a proof mass. The photonic band structure of the AOS is calculated with the plane-wave expansion approach for TE and TM polarization modes, and the light wave propagation inside the sensor is analyzed by solving Maxwell’s equations using the finite-difference time-domain method. The results of our simulations demonstrate that the fundamental PhC has a free spectral range of about 730 nm covering the optical communication wavelength-bands. Simulations also show that the AOS has the resonant peak of 0.8 at 1.644µm, quality factor of 3288, full width at half maximum of 0.5nm, and figure of merit of 0.97. Furthermore, for the maximum 200nm nanocavity displacements in the x- or y-direction, the resonant wavelengths shift to 1.618µm and 1.547µm, respectively. We also calculate all characteristics of the nanocavity displacement in positive and negative directions of the x-axis and y-axis. The small area of 104.35 µm2 and short propagation time of the AOS make it an interesting sensor for various applications, especially in the vehicle navigation systems and aviation safety tools.

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Section: Photonic Sensorsmentioning

confidence: 99%

A Novel All-Optical Sensor Design Based on a Tunable Resonant Nanocavity in Photonic Crystal Microstructure Applicable in MEMS Accelerometers

et al. 2020

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“…Photonic crystals are composed of alternating layers of insulating materials. PBG, as one of their unique properties [23][24][25], is de ned as a speci c frequency (or wavelength) range, in which the propagation of electromagnetic waves is prohibited in any direction and can be controlled by different structural parameters such as lattice constant, dielectric constant of the material and rod radius [26][27][28][29]. Electromagnetic waves propagate inside the PBG when a defect is formed.…”

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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“…This periodicity causes the appearance of an optical property called photonic band-gap PBG where the transmission of light is totally forbidden [5][6]. Thanks to the bandgap (PBG), several optical devices can be realized such as: optical lters [7][8][9], demultiplexers [10][11], logic ports [12][13][14], adders [15][16], analog-to-digital converters [17][18], encoders [19][20], decoders [21][22][23] and splitters [24][25] ...ect.…”

Section: Introductionmentioning

confidence: 99%

Original architecture of an efficient all-optical 2 × 4 photonic crystals decoder based on nonlinear ring resonators

2022

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In this paper, we have presented an e cient original architecture of all-optical 2×4 photonic crystal decoder based on non-linear ring resonators. The fundamental structure is a square lattice of 2D GaAs rods, operating around the wavelength 1.55 µm. The proposed decoder is composed of a combiner with three input ports, where the port E is used for excitation and A 1 , A 2 are the control ports, and an optical switch with four output ports, and it is a nonlinear DMEX. For the creation of a switch at the wavelength of 1.55 µm, we used nonlinear chalcogenide glass rods with a nonlinear Kerr coe cient equal to 9×10 -17 m 2 /w. The switching intensity and structure size are 1 Kw /µm 2 , 27.12 µm × 17.96 µm, respectively. The contrast ratio is about 8.7. The maximum crosstalk and insertion losses are calculated to be about -22.1 and -4.5 dB. The maximum and minimum power levels for logic states 0 and 1 are 0.5P 0 and 0.37P 0 where P 0 is the input power. The nite element method was used to perform the necessary calculations.

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An optical demultiplexer based on photonic crystal ring resonators

Cited by 74 publications

References 39 publications

A Novel All-Optical Sensor Design Based on a Tunable Resonant Nanocavity in Photonic Crystal Microstructure Applicable in MEMS Accelerometers

A Novel All-Optical Sensor Design Based on a Tunable Resonant Nanocavity in Photonic Crystal Microstructure Applicable in MEMS Accelerometers

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

Original architecture of an efficient all-optical 2 × 4 photonic crystals decoder based on nonlinear ring resonators

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