scholarly journals Vortex Beam Encoded All-Optical Logic Gates Based on Nano-Ring Plasmonic Antennas

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1649
Author(s):  
Houquan Liu ◽  
Hongchang Deng ◽  
Shijie Deng ◽  
Chuanxin Teng ◽  
Ming Chen ◽  
...  

Vortex beam encoded all-optical logic gates are suggested to be very important in future information processing. However, within current logic devices, only a few are encoded by using vortex beams and, in these devices, some space optical elements with big footprints (mirror, dove prism and pentaprism) are indispensable components, which is not conducive to device integration. In this paper, an integrated vortex beam encoded all-optical logic gate based on a nano-ring plasmonic antenna is proposed. In our scheme, by defining the two circular polarization states of the input vortex beams as the input logic states and the normalized intensity of the plasmonic field at the center of the nano-ring as the output logic states, OR and AND (NOR and NAND) logic gates are realized when two 1st (1st) order vortex beams are chosen as the two input signals; and a NOT logic gate is obtained when one 1st order vortex beam is chosen as the input signal. In addition, by defining the two linear polarization states (x and y polarization) of the input vortex beams as the two input logic states, an XNOR logic gate is realized when two 1st order vortex beams are chosen as the two input signals.

2018 ◽  
Vol 32 (02) ◽  
pp. 1850008 ◽  
Author(s):  
Luna Cui ◽  
Li Yu

Nano-scale Multifunctional Logic Gates based on Si hybrid plasmonic waveguides (HPWGs) are designed by utilizing the multimode interference (MMI) effect. The proposed device is composed of three input waveguides, three output waveguides and an MMI waveguide. The functional size of the device is only 1000 nm × 3200 nm, which is much smaller than traditional Si-based all-optical logic gates. By setting different input signals and selecting suitable threshold value, OR, AND, XOR and NOT gates are achieved simultaneously or individually in a single device. This may provide a way for ultrahigh speed signal processing and future nanophotonic integrated circuits.


Author(s):  
Shuai Zhao ◽  
Hongyu Hu

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.


Nanoscale ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 4523-4527 ◽  
Author(s):  
Zichen Yang ◽  
Yang Fu ◽  
Jing Yang ◽  
Chuang Hu ◽  
Jiasen Zhang

By employing a spin-encoded scheme, we achieve OR, AND, NOT, NAND and NOR logic gates via an L-shaped optical slot nanoantenna with a footprint of 300 nm by 300 nm, and a XNOR logic gate via a rectangle optical slot nanoantenna with a footprint of 220 nm by 60 nm.


2005 ◽  
Vol 41 (7) ◽  
pp. 435 ◽  
Author(s):  
A. Bogoni ◽  
L. Potì ◽  
R. Proietti ◽  
G. Meloni ◽  
F. Ponzini ◽  
...  

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hassan Mamnoon-Sofiani ◽  
Sahel Javahernia

Abstract All optical logic gates are building blocks for all optical data processors. One way of designing optical logic gates is using threshold switching which can be realized by combining an optical resonator with nonlinear Kerr effect. In this paper we showed that a novel structure consisting of nonlinear photonic crystal ring resonator which can be used for realizing optical NAND/NOR and majority gates. The delay time of the proposed NAND/NOR and majority gates are 2.5 ps and 1.5 ps respectively. Finite difference time domain and plane wave expansion methods were used for simulating the proposed optical logic gates. The total footprint of the proposed structure is about 988 μm2.


2002 ◽  
Vol 38 (1) ◽  
pp. 37-46 ◽  
Author(s):  
T. Yabu ◽  
M. Geshiro ◽  
T. Kitamura ◽  
K. Nishida ◽  
S. Sawa

Author(s):  
Ankur Saharia ◽  
Nitesh Mudgal ◽  
Ankit Agarwal ◽  
Sourabh Sahu ◽  
Sanjeev Jain ◽  
...  

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