Optimization of an All-Optical Photonic Crystal NOT Logic Gate Using Switch Based on Nonlinear Kerr Effect and Ring Resonator

2020 ◽  
Vol 18 (2) ◽  
pp. 89-94 ◽  
Author(s):  
Elhachemi Kouddad ◽  
Rafah Naoum
Keyword(s):  
Photonic Crystal ◽  
Kerr Effect ◽  
High Speed ◽  
Logic Gate ◽  
Contrast Ratio ◽  
Logic Gates ◽  
Square Lattice ◽  
All Optical ◽  
Easy Integration ◽  
Nano Crystal

In this paper, the use of the Kerr effect in a two-dimensional square lattice of In0.82Ga0.18As0.40P0.60 rods in photonic crystal proposes an ultra-compact all-optical NOT logic gate. The main device operation is based on the concept of all the optical switches. In our work, the novelty lies in the design of a new simple nonlinear ring based on the combination of silicon nano-crystal "Si–Nc/In0.82Ga0.18As0.40P0.60" materials that can be used. The contrast ratio and delay time for the proposed NOT logic gate are respectively 25.52 dB and 0.66 ps. The structure size is equal to 168 μm2. Designed logic gates are characterized by low energy consumption, high-speed response, compactness and easy integration. All simulations are based on Non-Linear-Finite Difference Time Domain (NL-FDTD) and Plane Wave Expansion (PWE) numerical methods.

scholarly journals Proposal of a Cascade Photonic Crystal XOR Logic Gate for Optical Integrated Circuits with Investigation of Fabrication Error and Optical Power Changes

Photonics ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 392
Author(s):  
Ahmad Mohebzadeh-Bahabady ◽  
Saeed Olyaee
Keyword(s):  
Photonic Crystal ◽  
Integrated Circuits ◽  
Low Power ◽  
Logic Gate ◽  
Contrast Ratio ◽  
Optical Power ◽  
Logic Gates ◽  
Optical Integrated Circuits ◽  
Fabrication Error ◽  
All Optical

A compact and simple structure is designed to create an all-optical XOR logic gate using a two-dimensional, photonic crystal lattice. The structure was implemented using three waveguides connected by two nano-resonators. The plane wave expansion method was used to obtain the photonic band gap and the finite-difference time-domain method was used to investigate the behavior of the electromagnetic field in the photonic crystal structure. Examining the high contrast ratio and high-speed cascade, all-optical XOR on a chip, the effects of fabrication error and the changes in the input optical power showed that the structure could be used in optical integrated circuits. The contrast ratio and data transfer rate of the cascade XOR logic gate were respectively obtained as 44.29 dB and 1.5 Tb/s. In addition, the designed structure had very small dimensions at 158.65 μm2 and required very low power to operate, which made it suitable for low-power circuits. This structure could also be used as a NOT logic gate. Therefore, an XNOR logic gate can be designed using XOR and NOT logic gates.

scholarly journals High Speed All-Optical Logic Gate Using QD-SOA and its Application

2017 ◽  
Author(s):  
Shuai Zhao ◽  
Hongyu Hu
Keyword(s):  
High Speed ◽  
Logic Gate ◽  
Logic Gates ◽  
Boolean Logic ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Optical Logic ◽  
Carrier Heating ◽  
Optical Logic Gates ◽  
All Optical

The scheme to realize high speed (~250Gb/s) all-optical Boolean logic gates using semiconductor optica amplifiers with quantum-dot (QD-SOA) is introduced and analyzed in this review. Numerical simulation method was presented by solving the rate equation and taking into account nonlinear dynamics including carrier heating and spectral hole-burning. Binary phase shift keyed (BPSK) signal and on-off keyed signal are used to generate high speed all-optical logic gates. The applications based on all-optical logic gates such as, all-optical latches, pseudo random bit sequence (PRBS) generation and all-optical encryption, are also discussed in this review. Results show that the scheme based on QD-SOA is a promising method for the realization of high speed all-optical communication system in the future.

A novel connected structure of all-optical high speed and ultra-compact photonic crystal OR logic gate

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Roumaissa Derdour ◽  
Mohamed Redha Lebbal ◽  
Souheil Mouetsi ◽  
Abdesselam Hocini
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Band Gap ◽  
High Speed ◽  
Logic Gate ◽  
Transmission Efficiency ◽  
Compact Size ◽  
All Optical ◽  
Connected Structure ◽  
Or Logic Gate

Abstract A new connected structure of an all-optical “OR” logic gate realized with photonic crystals is proposed in this study. The structure is based on coupling the input guides with two microcavities; the unit cell of the structure is designed to achieve a band gap around the communication wavelength (i.e., 1.55 µm). The performance of the structure results in transmission efficiency and low losses. This compact size logic gate is considered an important element in the integration of a nanoscale photonic device.

Investigation on two dimensional photonic crystal based two/three input all optical AND gate

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 417-426
Author(s):  
K. Rama Prabha ◽  
R. Arunkumar ◽  
S. Robinson
Keyword(s):  
Integrated Circuits ◽  
Optical Sensors ◽  
High Speed ◽  
Logic Gate ◽  
Contrast Ratio ◽  
Hexagonal Lattice ◽  
Two Dimensional ◽  
Optical Integrated Circuits ◽  
All Optical ◽  
Minimum Delay

AbstractIn this paper the design and analysis of two dimensional photonic crystals based all optical AND logic gate is investigated. A logic gate implements a Boolean function and thus performs a logical operation on one or several logic inputs in order to produce a single logic input. The proposed all optical AND gate is designed with line and point defect using a hexagonal lattice with “Y” shaped defect. In order to meet the requirements for high speed networks the proposed gate designed. The functional parameters such as contrast ratio, bit rate, normalized efficiency and response time are calculated. The performance of the AND gate is analyzed by using the Finite Difference Time Domain method. The proposed logic gate is designed to operate at 1550 nm. It provides high contrast ratio and minimum delay time. Hence it is suitable for optical sensors and optical integrated circuits.

Photonic Crystal-Based All-Optical Half Adder with High Contrast Ratio

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Priyanka Pathak ◽  
Rukhsar Zafar ◽  
Vinay Kanungo ◽  
Sandeep Vyas
Keyword(s):  
Photonic Crystal ◽  
Integrated Circuits ◽  
Response Time ◽  
Photonic Band Gap ◽  
Contrast Ratio ◽  
Optical Signal ◽  
Square Lattice ◽  
Half Adder ◽  
All Optical ◽  
Silicon Rods

AbstractPhotonic crystal waveguides provide a way to manipulate the performance of an optical signal in an ultra-small volume and are quite viable in designing chip-based components that will work all-optically. Here, in this article an all-optical half adder is proposed. It is based on a square lattice photonic crystal waveguide in which silicon rods are arranged periodically. The photonic crystal offers a wide photonic band-gap in the desired region of telecommunication wavelength (i. e. near λ = 1550 nm. The performance of half Adder is measured using the contrast ratio and response time. The contrast ratio for sum and carry is 5.2 dB and 16.7 dB, respectively. The proposed half adder is miniaturized in size and having a footprint of 49 µm2 only. The total response time of the proposed adder is 1.4 picoseconds only. So, the device offers a high bit rate of 0.714 Tb/sec. The proposed half adder is an optimum choice for its application in on-chip optical integrated circuits.

All-Optical XOR, XNOR, NAND and OR Logic Gates Based on Photonic Crystal 3-DB Coupler for BPSK Signals

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Afsaneh Heydari ◽  
Ali Bahrami ◽  
Abbas Mahmoodi
Keyword(s):  
Photonic Crystal ◽  
Light Propagation ◽  
Photonic Band Gap ◽  
Logic Gates ◽  
Square Lattice ◽  
Logical Function ◽  
Compact Structure ◽  
All Optical ◽  
Logic Functions ◽  
Photonic Band

AbstractWe propose a very compact structure for all-optical XOR, XNOR, NAND and OR logic gates based on photonic crystal 3-dB coupler in binary-phase-shift-keyed (BPSK) signals. The square lattice of dielectric rods in SiO2 background has been considered for photonic crystal structure. The photonic band gap (PBG) and light propagation simulations of proposed logic structure have been accomplished by plane wave expansion and finite difference time domain methods. The proposed structure can achieve logical function when the refractive index of all rods and substrate is fabricated with relaxed error tolerance within −0.005 to 0.005 from designed parameters. The proposed logic functions may potentially be used as key components in all-optical information networks for processing the BPSK signals.

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