Design and Construction of Wireless Power Transfer System Using Magnetic Resonant Coupling
Syed Khalid Rahman,
Omar Ahmed,
Md. Saiful Islam,
A. H. M. Rafiul Awal,
Md. Shariful Islam
Issue:
Volume 2, Issue 2, March 2014
Pages:
11-15
Received:
6 April 2014
Accepted:
28 April 2014
Published:
10 May 2014
Abstract: Wireless power transmission is the transmission of electrical energy without using any conductor or wire. It is useful to transfer electrical energy to those places where it is hard to transmit energy using conventional wires. In this paper, we designed and implemented a wireless power transfer system using the basics of magnetic resonant coupling. Numerical data are presented for power transfer efficiency of both receivers. Graphs are given to show the comparison of power and efficiency with distance of both receivers.
Abstract: Wireless power transmission is the transmission of electrical energy without using any conductor or wire. It is useful to transfer electrical energy to those places where it is hard to transmit energy using conventional wires. In this paper, we designed and implemented a wireless power transfer system using the basics of magnetic resonant coupling....
Show More
Scrutiny of Injected Electron Current Polarization Effect on the Threshold Current Density Reduction in QW Spin-Lasers
S. N. Hosseinimotlagh,
H. Ghavidelfard,
M. Pezeshkian,
H. Molaei
Issue:
Volume 2, Issue 2, March 2014
Pages:
16-22
Received:
5 March 2014
Accepted:
22 April 2014
Published:
30 May 2014
Abstract: One of the mechanisms for threshold current density reduction is using spin polarized carriers generated by electrical spin injection. Electrical spin injection is spin-polarized carrier injection by using a magnetic contact. In this paper, we have solved numerically rate equations governing on semiconductor spin un-polarized and polarized laser with - based quantum well active region in which Schottky tunnel barrier treat as the spin injector. For the first time, we demonstrate simultaneously effect of normalized spin relaxation rate and injected current polarization on threshold current density reduction related to two form of spontaneous recombination. According to our result threshold current density reduction increases by simultaneously normalized spin relaxation rate reduction and increasing of injected current polarization. Maximum obtained threshold current density reduction values for linear and quadratic spontaneous recombination is 0.07 and 0.31. Moreover, we compute and compare the effect of value of injected electron current polarization on normalized spin-filtering interval for two types of recombination. Maximum obtained normalized spin-filtering interval values for linear and quadratic spontaneous recombination is 1.2 and 1.36. Finally we calculate spin-up optical gain and from this we obtained the conditions for achieving optimum optical gain. Maximum obtained spin-up optical gain valueis17.36.
Abstract: One of the mechanisms for threshold current density reduction is using spin polarized carriers generated by electrical spin injection. Electrical spin injection is spin-polarized carrier injection by using a magnetic contact. In this paper, we have solved numerically rate equations governing on semiconductor spin un-polarized and polarized laser wi...
Show More
