An All Optical Approach to Construct J-K Flip-Flop by Proper Exploitation of Nonlinear Material
Issue:
Volume 8, Issue 1, March 2020
Pages:
1-5
Received:
5 August 2019
Accepted:
18 January 2020
Published:
31 January 2020
Abstract: Optical signal is the best suitable one for data processing and digital signal communication for its inherent parallelism and tremendous operational speed. Conventional electronic or optoelectronic devices are unable to fulfill this due to less speed and time delay. In the case of perfect electronic flip-flop, at the time of switching turned ON, there is noticeable propagation delay on the order of nanoseconds. In the case of an opto-electronic flip-flop, although the propagation delays time is much less than those of a pure electronic flip-flop about 10 to 100 times less, there are many disadvantages still have. Some of these disadvantages are delay of response time due to the use of spatial light modulators, an O/E converter that does not operate at all frequencies or wavelengths, and the unavailability of such materials. An optical input encoding methodology may be the alternative for the performance of two inputs all-optical flip-flop operations. These operations may be conducted in all-optical mode and will be parallel in nature. All the operations may be conducted with proper exploitation of some nonlinear materials. In this communication author reported an optical encoding technique for the construction of clocked J-K flip-flop with two inputs. All the operations are conducted by the proper exploitation of nonlinear materials.
Abstract: Optical signal is the best suitable one for data processing and digital signal communication for its inherent parallelism and tremendous operational speed. Conventional electronic or optoelectronic devices are unable to fulfill this due to less speed and time delay. In the case of perfect electronic flip-flop, at the time of switching turned ON, th...
Show More
Simulation and Analysis Method of Different Back Metals Contact of CH3NH3PbI3 Perovskite Solar Cell Along with Electron Transport Layer TiO2 Using MBMT-MAPLE/PLD
Ali Husainat,
Warsame Ali,
Penrose Cofie,
John Attia,
John Fuller,
Abdalla Darwish
Issue:
Volume 8, Issue 1, March 2020
Pages:
6-26
Received:
30 January 2020
Accepted:
11 February 2020
Published:
24 February 2020
Abstract: Many different photovoltaic technologies are being developed for better solar energy conversion. Until now, crystalline Si solar cell represents the dominant photovoltaic technology with a market share of more than 94% with an efficiency between (15%-20%). Organic-inorganic halide Perovskite Solar Cell (PSC) has emerged as the most promising candidate for the next generation high-efficiency solar cell technology that attracted interest from researchers around the world due to their high efficiency of more than 24.% in a short period from (2008-2019) and low fabrication cost. In this paper, we designed a lead-based PSC model with a cell structure of Glass/FTO/TiO2/CH3NH3PBI3/Spiro-OMeTAD/(Au, Ag, Al, Cu, Cr, Cu-graphite alloy, and Pt) and analyzed the structure with different contact materials using Solar Cell Capacitance Simulator (SCAPS-1D) which is well adopted by many researchers to study and analyze the hybrid solar cell. Using the software allows researchers to inexpensively and promptly, the effect of the absorber and the contact materials on the performance of the proposed solar cell model. We also studied the bandgap of the active layer, defect density, thickness, operating temperature, and the fabrication method of the model. Furthermore, the adoption of multibeam multi-target MAPLE and PLD or with acronym MBMT-MAPLE/PLD techniques as a new fabrication method in our simulation program mentioned above. A promising result was achieved. Efficiencies of 27.25%, 26.52%, 18.90%, 25.66%, 22.77%, 27.25%, and 27.25% were obtained for the devices with Au, Ag, Al, Cu, Cr, Pt, and Cu-graphite alloy, respectively. The effect of the work function on the back contact has a significant influence over the FF and efficiency.
Abstract: Many different photovoltaic technologies are being developed for better solar energy conversion. Until now, crystalline Si solar cell represents the dominant photovoltaic technology with a market share of more than 94% with an efficiency between (15%-20%). Organic-inorganic halide Perovskite Solar Cell (PSC) has emerged as the most promising candid...
Show More
Solitary Waves and Property Management of Nonlinear Dispersive and Flattened Optical Fiber
Christian Ngouo Tchinda,
Jean Roger Bogning
Issue:
Volume 8, Issue 1, March 2020
Pages:
27-32
Received:
21 November 2019
Accepted:
11 December 2019
Published:
13 April 2020
Abstract: In this work, we establish the Conditions that must satisfy the characteristic coefficients of the nonlinear and flattened dispersive optical fiber so that certain classes of solitary waves propagate there with fewer fluctuations. Once the conditions are established, we determine the exact solutions as well as the corresponding nonlinear partial differential equations that govern the propagation dynamics in this transmission medium. The propagation of the solutions obtained is also tested. The method used to obtain the analytical solutions is based on the control of the properties of the Bogning implicit functions whereas the numerical simulations are made through the split-step method which is very adapted to simulate the propagation of the signals.
Abstract: In this work, we establish the Conditions that must satisfy the characteristic coefficients of the nonlinear and flattened dispersive optical fiber so that certain classes of solitary waves propagate there with fewer fluctuations. Once the conditions are established, we determine the exact solutions as well as the corresponding nonlinear partial di...
Show More
