scholarly journals Optimized design of an all-optical XOR gate with high contrast ratio and ultra-compact dimensions

2022 ◽  
Vol 128 (2) ◽  
Author(s):  
E. G. Anagha ◽  
R. K. Jeyachitra
Keyword(s):  
Contrast Ratio ◽  
Optimized Design ◽  
High Contrast ◽  
Xor Gate ◽  
All Optical

scholarly journals All-Optical Ultra-Fast Graphene-Photonic Crystal Switch

Crystals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 461 ◽  
Author(s):  
Mohammad Reza Jalali Azizpour ◽  
Mohammad Soroosh ◽  
Narges Dalvand ◽  
Yousef Seifi-Kavian
Keyword(s):  
Photonic Crystal ◽  
Integrated Circuits ◽  
Contrast Ratio ◽  
Fast Response ◽  
High Contrast ◽  
Switching Operation ◽  
Optical Integrated Circuits ◽  
All Optical ◽  
The Difference ◽  
Silicon Rods

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.

scholarly journals Design of an ultra-compact and high-contrast ratio all-optical NOR gate

2021 ◽  
Vol 53 (12) ◽  
Author(s):  
Fariborz Parandin ◽  
Naser Mahtabi
Keyword(s):  
Contrast Ratio ◽  
High Contrast ◽  
All Optical ◽  
Nor Gate

Realization of all-optical NOT and XOR logic gates based on interference effect with high contrast ratio and ultra-compacted size

2018 ◽  
Vol 50 (11) ◽  
Author(s):  
Saeed Olyaee ◽  
Mahmood Seifouri ◽  
Ahmad Mohebzadeh-Bahabady ◽  
Mostafa Sardari
Keyword(s):  
Interference Effect ◽  
Contrast Ratio ◽  
Logic Gates ◽  
High Contrast ◽  
All Optical

Fano Resonance Excited All-Optical XOR, XNOR, and NOT Gates with High Contrast Ratio

Plasmonics ◽  
2018 ◽  
Vol 13 (6) ◽  
pp. 1987-1994 ◽  
Author(s):  
Rukhsar Zafar ◽  
Sarfaraz Nawaz ◽  
Mohammad Salim
Keyword(s):  
Fano Resonance ◽  
Contrast Ratio ◽  
High Contrast ◽  
All Optical

All optical half subtractor based on threshold switching and beams interference mechanisms

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Asghar Askarian
Keyword(s):  
Steady State ◽  
Photonic Crystal ◽  
Ring Resonator ◽  
Contrast Ratio ◽  
High Contrast ◽  
Threshold Switching ◽  
All Optical ◽  
Simulation Results ◽  
Maximum Rise

AbstractIn this paper, ultra-fast, compact and high contrast ratio all optical half subtractor based on photonic crystal designed and simulated. The proposed design will be constructed using both threshold switching and interference of beams mechanisms. The proposed structure is composed of six waveguides and a nonlinear ring resonator. The simulation results show that the contrast ratio for D and B ports were obtained about 18.80 and 15.05 dB, respectively. Also the maximum rise, fall and steady-state times and total footprint for suggested all optical half subtractor are 0.5, 0.25, 1.5 ps and 234 μm2, respectively.

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