scholarly journals Design of Plasmonic NOT Logic Gate Based on Insulator – Metal – Insulator (IMI) waveguides

2020 ◽  
Vol 9 (1) ◽  
pp. 91-94
Author(s):  
H. F. Fakhruldeen ◽  
T. S. Mansour
Keyword(s):  
Dielectric Material ◽  
Logic Gate ◽  
Incident Light ◽  
Contrast Ratio ◽  
Optical Signal ◽  
Limit Problem ◽  
Dielectric Waveguides ◽  
Plasmonic Waveguides ◽  
Metal Insulator ◽  
All Optical

   In this work, all-optical plasmonic NOT logic gate was proposed using Insulator-Metal-Insulator (IMI) plasmonic waveguides Technology. The proposed all-optical NOT gate is simulated and realized using COMSOL Multiphysics 5.3a software. Recently, plasmonic technology has attracted high attention due to its wide applications in all-optical signal processing. Due to its highly localization to metallic surfaces, surface plasmon (SP) may have huge applications in sub wavelength to guide the optical signal in the waveguides which results in overcoming the diffraction limit problem in conventional optics. The proposed IMI structure is consist of a dielectric waveguides plus metallic claddings, which guide the incident light strongly in the insulator region. Our design consists of symmetric nano-rings structures with two straight waveguides which based on IMI structure. The operation of all-optical NOT gate is realized by employing the constructive and destructive interface between the straight waveguides and the nano-rings structure waveguides. There are three ports in the proposed design, input, control and output ports. The activation of control port is always ON. By changing the structure dimensions, the materials, the phase of the applied optical signal to the input and control ports, the optical transmission at the output port is changed. In our proposed structure, the insulator dielectric material is glass and the metal material is silver. The calculated contrast ratio between (ON and OFF) output states is 3.16 (dB).

scholarly journals All-Optical NOT Gate Based on Nanoring Silver-Air Plasmonic Waveguide

2018 ◽  
Vol 7 (4) ◽  
pp. 2818
Author(s):  
Hassan Falah Fakhruldeen ◽  
Tahreer Safaa Mansour
Keyword(s):  
Logic Gate ◽  
Incident Light ◽  
Optical Signal ◽  
Ring Structure ◽  
Dielectric Waveguides ◽  
Plasmonic Waveguides ◽  
Optical Logic ◽  
Metal Insulator Metal ◽  
All Optical ◽  
Control Port

In this work, all-optical plasmonic NOT logic gate was proposed by using metal-insulator-metal (MIM) plasmonic waveguides design. This logic gate is numerically analyzed by COMSOL Multiphysics 5.3a. Recently, plasmonics have attracted more attention due to its huge applications in all optical signal processing. Due to it’s highly localization to metallic surfaces, surface plasmon (SP) may have many applications in sub wavelength to guide the optical signal in waveguides to overcome the diffraction limit which considered a big problem in conventional optics. The proposed design of MIM structure is consist of a dielectric waveguides plus metallic claddings, which guide the incident light strongly in the insulator region. Strong localization and relatively simple fabrication make the MIM waveguides the potential key design of Nano-scale all optical devices. Our design consists of symmetric ring structures with straight waveguides which based on MIM structure. All-optical logic gate (NOT gate) behavior is achieved from utilizing the interface between straight waveguides and ring structure waveguides. By switching the activation of the control port, the propagation of the outgoing field in the output waveguide will be changed. As the simulation results show, the proposed structure could operate as an all-optical NOT logic gate. This gate would be a potential component in many applications of all-optical signals processing.  

scholarly journals Design an All-Optical Combinational Logic Circuits Based on Nano-Ring Insulator-Metal-Insulator Plasmonic Waveguides

Photonics ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 30 ◽  
Author(s):  
Saif Abdulnabi ◽  
Mohammed Abbas
Keyword(s):  
Integrated Circuits ◽  
Threshold Value ◽  
Full Adder ◽  
Optical Signal ◽  
Combinational Logic ◽  
Plasmonic Waveguides ◽  
Metal Insulator ◽  
Half Adder ◽  
All Optical ◽  
Logic Functions

In this paper, we propose, analyze and simulate a new configuration to simulate all-optical combinational logic functions based on Nano-rings insulator-metal-insulator (IMI) plasmonic waveguides. We used Finite Element Method (FEM) to analyze the proposed plasmonic combinational logic functions. The analyzed combinational logic functions are Half-Adder, Full-Adder, Half-Subtractor, and Comparator One-Bit. The operation principle of these combinational logic functions is based on the constructive and destructive interferences between the input signal(s) and control signal. Numerical simulations show that a transmission threshold exists (0.25) which allows all proposed four plasmonic combinational logic functions to be achieved in one structure. As a result, the transmission threshold value measures the performance of the proposed plasmonic combinational logic functions. We use the same structure with the same dimensions at 1550 nm wavelength for all proposed plasmonic combinational logic functions. The proposed all-optical combinational logic functions structure contributes significantly to photonic integrated circuits construction and all-optical signal processing nano-circuits.

scholarly journals Design of All-Optical Directional Coupler Using Plasmonic MIM Waveguide for Switching Applications

2021 ◽  
Author(s):  
Rupalin Nanda ◽  
Ramakrushna Rath ◽  
Sandip Swarnakar ◽  
Santosh Kumar
Keyword(s):  
Optical Switching ◽  
Directional Coupler ◽  
Fdtd Method ◽  
Optical Signal ◽  
Separation Distance ◽  
Propagation Loss ◽  
Slab Waveguide ◽  
Plasmonic Waveguides ◽  
Metal Insulator Metal ◽  
All Optical

Abstract In this paper, we have proposed, analyzed, and verified theperformance of an optimized plasmonic 10-dB directional coupler and a 3-dB directional coupler in 2-D plasmonic waveguides using finite-difference-time-domain (FDTD) method. A plasmonic 10-dB directional coupler and a 3-dB directional coupler are based on the metal-insulator-metal (MIM) slab waveguide and analyzed at the telecommunication wavelength (λ) of 1550 nm. Here, coupling and transmission characteristics are analyzed with the optimized separation distance between the two parallel waveguides. The developed approach ensures the minimization of the crosstalk and overall directional coupler length via simultaneous adjustment of the separation distance between the parallel waveguide and length of the linear waveguide. Then an optimized structure is acquired by trading off between coupling length and separation distance. The proposed 10-dB directional coupler and 3-dB directional coupler features good energy confinement, ultra-compact and low propagation loss, which has potential applications in photonic integrated devices, optical signal processors, and other all-optical switching devices.

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.

All-optical logic in fiber systems using nonlinear refraction

1987 ◽  
Vol 65 (8) ◽  
pp. 913-918 ◽  
Author(s):  
R. Normandin
Keyword(s):  
Fiber Optics ◽  
Communication Systems ◽  
Logic Gate ◽  
Nonlinear Refraction ◽  
Contrast Ratio ◽  
Optical Logic ◽  
Physical Mechanisms ◽  
All Optical ◽  
Wavelength Control ◽  
Logic Functions

We describe the realization of a nonlinear all-optical logic gate and modulator for use in fiber-optics communication systems. The physical mechanisms for the optical nonlinearities and their influences on device operation and design are considered. Results are presented for the AND, NOR, NOT, and XOR logic functions with a better than 20 dB contrast ratio. The gates and modulators exhibit exceptional stability, because no resonator, feedback, or stringent wavelength control are needed. Silicon at λ = 1.06 μm has been used for these "proof-of- concept" experiments. The feasibility of picosecond operation, multiplexing, and wavelength translation is discussed.

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.

scholarly journals Chip-integrated all-optical diode based on nonlinear plasmonic nanocavities covered with multicomponent nanocomposite

Nanophotonics ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 329-339 ◽  
Author(s):  
Zhen Chai ◽  
Xiaoyong Hu ◽  
Hong Yang ◽  
Qihuang Gong
Keyword(s):  
Slow Light ◽  
Incident Light ◽  
Contrast Ratio ◽  
Field Enhancement ◽  
Optical Nonlinearity ◽  
Enhancement Effect ◽  
Light Power ◽  
Nanocomposite Layer ◽  
All Optical ◽  
Optical Diode

AbstractUltracompact chip-integrated all-optical diode is realized experimentally in a plasmonic microstructure, consisting of a plasmonic waveguide side-coupled two asymmetric plasmonic composite nanocavities covered with a multicomponent nanocomposite layer, formed directly in a plasmonic circuit. Extremely large optical nonlinearity enhancement is obtained for the multicomponent nanocomposite cover layer, originating from resonant excitation, slow-light effect, and field enhancement effect. Nonreciprocal transmission was achieved based on the difference in the shift magnitude of the transparency window centers of two asymmetric plasmonic nanocavities induced by the signal light, itself, for the forward and backward propagation cases. An ultralow threshold incident light power of 145 μW (corresponding to a threshold intensity of 570 kW/cm2) is realized, which is reduced by seven orders of magnitude compared with previous reports. An ultrasmall feature size of 2 μm and a transmission contrast ratio of 15 dB are obtained simultaneously.

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.

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