Scientific Results

External modes in quantum dot light emitting diode with filtered optical feedback

Year: 2016

Authors: Al Husseini HB., Al-Naimee K., Al-Khursan AH., Khedir AH.

Autors Affiliation: Thi Qar Univ, Nassiriya Nanotechnol Res Lab, Coll Sci, Nassiriya, Iraq; Univ Baghdad, Coll Sci, Dept Phys, Baghdad, Iraq;‎ CNR, Ist Nazl Ott, Largo E Fermi 6, I-50125 Florence, Italy

Abstract: This research reports a theoretical investigation on the role of filtered optical feedback (FOF) in the quantum dot light emitting diode (QD-LED). The underlying dynamics is affected by a sidle node, which returns to an elliptical shape when the wetting layer (WL) is neglected. Both filter width and time delay change the appearance of different dynamics (chaotic and mixed mode oscillations, MMOs). The results agree with the experimental observations. Here, the fixed point analysis for QDs was done for the first time. For QD-LED with FOF, the system transits from the coherence collapse case in conventional optical feedback to a coherent case with a filtered mode in FOF. It was found that the WL washes out the modes which is an unexpected result. This may attributed to the longer capture time of WL compared with that between QD states. Thus, WL reduces the chaotic behavior. Published by AIP Publishing.

Journal/Review: JOURNAL OF APPLIED PHYSICS

Volume: 119 (22)      Pages from: 224301-1  to: 224301-10

KeyWords: SEMICONDUCTOR-LASER DYNAMICS; OPTOELECTRONIC FEEDBACK; NONLINEAR DYNAMICS; SYNCHRONIZATION; SCENARIOS; CHAOS
DOI: 10.1063/1.4953651

Citations: 8
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17
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