Design and simulation of an all optical photonic crystal-based comparator

Fakouri-Farid, Vahideh; Andalib, Alireza

doi:10.1016/j.ijleo.2018.06.153

Cited by 77 publications

(15 citation statements)

References 47 publications

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“…Every PCRR has a resonant mode, acting as an optical pass-band or stopband lter. So far, a large number of PhC-based devices such as optical lters [20][21][22][23], logic gates [24][25][26], encoders [27,28], comparators [29,30], adders and subtractors [10,31,32], registers [33,34], and memories [35][36][37], as well as all-optical clocked sequential circuits including ip-ops [38,39], synchronous and asynchronous counters [40,41] have been designed and fabricated. New functionality was created using high nonlinear dielectric rods in the resonator, and switching applications can be achieved.…”

Section: Introductionmentioning

confidence: 99%

A novel design of fast and compact all-optical full-adder using nonlinear resonant cavities

Naghizade

Saghaei

2021

Opt Quant Electron

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In this paper, we report a new design of all-optical full-adder using two nonlinear resonators. The PhCbased full-adder consists of three input ports (A, B, and C for input bits), two nonlinear resonant cavities, several waveguides, and two output ports (for the Sum and Carry). Eight silicon rods and a nonlinear rod composed of doped glass form each resonant cavity. The well-known plane wave expansion technique is used to calculate the photonic band structure. It shows a wide photonic bandgap in the wavelength range of 1365 nm to 2074 nm covering the C and L optical transmission bands. The nite-difference timedomain method is applied to study the light propagation inside the full-adder. Our numerical results demonstrate when the incoming light intensity increases, the nonlinear optical Kerr effect appears and controls the direction of light emitted inside the structure as desired. The maximum time delay and footprint of the proposed full-adder are about 3ps and 758.5 µm 2 , respectively. Therefore, due to the low time delay and small footprint, the presented design can be used as a basic mathematical operator in the all-optical arithmetic logic unit.

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Section: Introductionmentioning

confidence: 99%

A novel design of fast and compact all-optical full-adder using nonlinear resonant cavities

Naghizade

Saghaei

2021

Opt Quant Electron

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“…It is possible to confine and control the propagation of electromagnetic waves inside the desired PhC-based structures due to the available photonic band gap (PBG) in PhCs. So far a variety of all-optical devices such as filters [7][8][9][10][11], modulators [12,13], sensors [14][15][16][17][18], optical fibers [19][20][21][22][23][24][25][26], fundamental logic gates [27][28][29][30][31][32][33], encoders [34][35][36], decoders [37][38][39], demultiplexers [40][41][42][43][44], PhC fibers [45][46][47][48][49], interferometers [50,51], comparators [52][53][54]…”

Section: Introductionmentioning

confidence: 99%

Ultra-fast tunable optoelectronic half adder/subtractor based on photonic crystal ring resonators covered by graphene nanoshells

Naghizade

Saghaei

2021

Opt Quant Electron

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This paper reports a new design of a tunable optoelectronic half adder/subtractor. Two photonic crystal (PhC) ring resonators are used to realize the proposed structure. Several silicon rods surrounded by silica rods covered with graphene nanoshells (GNSs) form every PhC ring resonator. Setting the chemical potential of GNS with an appropriate gate voltage, we can tune the PhC resonant mode as desired. The plane wave expansion technique is used to study the photonic band structure of the fundamental PC microstructure, and the finitedifference time-domain method is employed in the final design for solving Maxwell's equations to analyze the light propagation inside the structure. We systematically study the effects of physical parameters on the transmission reflection and absorption spectra. By optimizing the geometric dimensions, resonant absorption peaks can be excited at the same time for GNSs. Our numerical results also reveal the maximum time response is about 0.8 ps. The 200 µm 2 area of the proposed half adder/subtractor makes it the building block of every photonic integrated circuit. Also, the design of various fast signal processing systems in optical communication networks is possible due to using tunable GNSs in PhC ring resonators. This study can introduce the use of two-dimensional materials in the design and implementation of logic circuits.

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“…The rst PhC based optical comparator was proposed by Fakouri-Farid et al (Fakouri-Farid and Andalib 2018), using four nonlinear ring resonators. The delay time for this structure is 6 ps.…”

Section: Introductionmentioning

confidence: 99%

Proposal for all optical comparator using nonlinear PhC-based cavities

Pishkhani

2021

Preprint

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In this paper an all optical comparator was designed and simulated. The proposed structure works using nonlinear threshold switching that was implemented by application of nonlinear resonant cavities. X and Y are the input ports of the proposed structure using different combination of these input ports one can control that which bias port can be connected to its corresponding output port. O1 is ON when X is ON and Y is OFF, O2 is ON when Y is ON and X is OFF, and O3 is ON when both X and Y have similar states.

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Design and simulation of an all optical photonic crystal-based comparator

Cited by 77 publications

References 47 publications

A novel design of fast and compact all-optical full-adder using nonlinear resonant cavities

A novel design of fast and compact all-optical full-adder using nonlinear resonant cavities

Ultra-fast tunable optoelectronic half adder/subtractor based on photonic crystal ring resonators covered by graphene nanoshells

Proposal for all optical comparator using nonlinear PhC-based cavities

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