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Physical Science International Journal, ISSN: 2348-0130,Vol.: 4, Issue.: 8 (October)


Analytical Investigation of Electrons Capture Time Effect on the Threshold Current Density Reduction in QD Spin-Lasers


S. N. Hosseinimotlagh1*, H. Ghavidelfard2 and A.Shakeri3

1Department of Physics, Shiraz branch Islamic Azad University, Shiraz, Iran.
2Department of Physics, Payam Noor University, Bandar Abbas, Iran.
3Department of Physics, Islamic Azad University, Arsenjan Branch, Fars, Iran.

Article Information


(1) Wynand Verwoerd, Lincoln University, Christchurch, New Zealand.

(2) Christian Brosseau, Distinguished Professor, Department of Physics, Université de Bretagne Occidentale, France.


(1) Anonymous.

(2) Fouokeng Georges Collince, University of Dschang, Cameroon.

(3) Anonymous.

Complete Peer review History:http://www.sciencedomain.org/review-history/4946


In this paper, we solve numerically the rate equations governing the semiconductor spin with un-polarized and polarized laser field based on quantum dot active region in which Schottky tunnel barrier treats as the spin injector. We demonstrate simultaneously the effects of electron capture time, and injected current polarization on threshold current density reduction and normalized spin-filtering interval. The threshold current density reduction and normalized spin-filtering interval increases simultaneously with electrons capture time reduction and increase of injected current polarization. The maximum obtained threshold current density reduction and normalized spin-filtering interval values are0.353 and 0.90, respectively. We also calculate the spin-up optical gain and obtain the conditions for achieving optimum optical gain. The maximum obtained spin-up optical gain value is 17.70.

Keywords :

Spin laser, gain; threshold current; quantum dot; filtering.

Full Article - PDF    Page 1050-1064

DOI : 10.9734/PSIJ/2014/9676

Review History    Comments

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