Influence of incoherent pumping field on spatial evolution of gain without inversion in a four-level quantum dot nanostructure

We investigated the propagation effect on gain without inversion (GWI) phenomena in an open four level quantum dot nanostructure in the presence and absence of incoherent pumping field. The simulation results show that, the ratio of the injection rates and strength of incoherent pumping field has re...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2015-09, Vol.473, p.101-106
Main Authors: Karimi, R., Asadpour, S.H., Batebi, S., Rahimpour Soleimani, H.
Format: Article
Language:English
Subjects:
Condensed matter
Evolution
Gain
Gain without population inversion
Incoherent pumping field
Inversions
Nanostructure
Open systems
Optimization
Pumping
Quantum dot nanostructure
Qunatum dots
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Summary:We investigated the propagation effect on gain without inversion (GWI) phenomena in an open four level quantum dot nanostructure in the presence and absence of incoherent pumping field. The simulation results show that, the ratio of the injection rates and strength of incoherent pumping field has remarkable effect on spatial evolution of GWI and output. We can obtain the optimal GWI and output by choosing appropriate values of parameters. The theoretical results show that, in the open system the value of gain (output) in the absence of incoherent pumping field is much larger than that in the presence of incoherent pumping field.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2015.05.015