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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/24429
Title: Nonlinear pulse propagation in InAs/InP quantum dot optical amplifiers: Rabi oscillations in the presence of nonresonant nonlinearities
Authors: Karni O.
Mishra, Akhilesh Kumar
Eisenstein G.
Reithmaier J.P.
Published in: Physical Review B - Condensed Matter and Materials Physics
Abstract: We study the interplay between coherent light-matter interactions and nonresonant pulse propagation effects when ultrashort pulses propagate in room-temperature quantum dot (QD) semiconductor optical amplifiers (SOAs). The signatures observed on a pulse envelope after propagating in a transparent SOA, when coherent Rabi oscillations are absent, highlight the contribution of two-photon absorption (TPA), and its accompanying Kerr-like effect, as well as of linear dispersion, to the modification of the pulse complex electric field profile. These effects are incorporated into our previously developed finite-difference time-domain comprehensive model that describes the interaction between the pulses and the QD SOA. The present generalized model is used to investigate the combined effect of coherent and nonresonant phenomena in the gain and absorption regimes of the QD SOA. It confirms that in the QD SOA we examined, linear dispersion in the presence of the Kerr-like effect causes pulse compression, which counteracts the pulse peak suppression due to TPA, and also modifies the patterns which the coherent Rabi oscillations imprint on the pulse envelope under both gain and absorption conditions. The inclusion of these effects leads to a better fit with experiments and to a better understanding of the interplay among the various mechanisms so as to be able to better analyze more complex future experiments of coherent light-matter interaction induced by short pulses propagating along an SOA. © 2015 American Physical Society.
Citation: Physical Review B - Condensed Matter and Materials Physics, 91(11)
URI: https://doi.org/10.1103/PhysRevB.91.115304
http://repository.iitr.ac.in/handle/123456789/24429
Issue Date: 2015
Publisher: American Physical Society
ISSN: 10980121
Author Scopus IDs: 22035212000
15124163500
7005889949
7004689148
Author Affiliations: Karni, O., Electrical Engineering Department, Technion-Israel Institute of Technology, Haifa, 32000, Israel
Mishra, A.K., Electrical Engineering Department, Technion-Israel Institute of Technology, Haifa, 32000, Israel
Eisenstein, G., Electrical Engineering Department, Technion-Israel Institute of Technology, Haifa, 32000, Israel
Reithmaier, J.P., Technische Physik, Institute of Nanostructure Technologies and Analytics, University of Kassel, Kassel, 34132, Germany
Appears in Collections:Journal Publications [PH]

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