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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/24412
Title: Ramsey fringes in a roomerature quantum-dot semiconductor optical amplifier
Authors: Khanonkin I.
Mishra, Akhilesh Kumar
Karni O.
Banyoudeh S.
Schnabel F.
Sichkovskyi V.
Mikhelashvili V.
Reithmaier J.P.
Eisenstein G.
Published in: Physical Review B
Abstract: The ability to induce, observe, and control quantum coherent interactions in roomerature, electrically driven optoelectronic devices is of utmost significance for advancing quantum science and engineering towards practical applications. We demonstrate here a coherent interference phenomena, Ramsey fringes, in an inhomogeneously broadened InAs/InP quantum-dot (QD) ensemble in the form of a 1.5-mm-long optical amplifier operating at room temperature. The observation of Ramsey fringes in semiconductor QDs was previously achieved only at cryogenic temperatures and only in isolated single-dot systems. A high-resolution pump-probe scheme where both pulses are characterized by cross-frequency-resolved optical gating reveals a clear oscillatory behavior both in the amplitude and the instantaneous frequency of the probe pulse with a period that equals one optical cycle at the operational wavelength. Using nominal input delays of 600-900 fs and scanning the separation around each delay in 1-fs steps, we map the evolution of the material decoherence and extract a coherence time of 340 fs. Moreover, we observed a unique phenomenon, which cannot be observed in single-dot systems, that the temporal position of the output probe pulse also oscillates with the same periodicity but with a quarter cycle delay relative to the intensity variations. The modulation of the pulse separation results from coupling between the real and imaginary parts of the susceptibility and the quadrature delay is the time domain manifestation of its complex nature. © 2018 American Physical Society.
Citation: Physical Review B, 97(24)
URI: https://doi.org/10.1103/PhysRevB.97.241117
http://repository.iitr.ac.in/handle/123456789/24412
Issue Date: 2018
Publisher: American Physical Society
ISSN: 24699950
Author Scopus IDs: 57193757612
15124163500
22035212000
55991452700
7003679780
14038076300
55978787100
7004689148
7005889949
Author Affiliations: Khanonkin, I., Russell Berrie Nanotechnology Institute, Technion, Haifa, 32000, Israel, Andrew and Erna Viterbi Department of Electrical Engineering, Technion, Haifa, 32000, Israel
Mishra, A.K., Russell Berrie Nanotechnology Institute, Technion, Haifa, 32000, Israel, Andrew and Erna Viterbi Department of Electrical Engineering, Technion, Haifa, 32000, Israel
Karni, O., E. L. Ginzton Laboratory, Applied Physics Department, Stanford University, Stanford, CA 94305, United States
Banyoudeh, S., Institute of Nanostructure Technologies and Analytics, Technische Physik, CINSaT, University of Kassel, Kassel, D-34132, Germany
Schnabel, F., Institute of Nanostructure Technologies and Analytics, Technische Physik, CINSaT, University of Kassel, Kassel, D-34132, Germany
Sichkovskyi, V., Institute of Nanostructure Technologies and Analytics, Technische Physik, CINSaT, University of Kassel, Kassel, D-34132, Germany
Mikhelashvili, V., Russell Berrie Nanotechnology Institute, Technion, Haifa, 32000, Israel, Andrew and Erna Viterbi Department of Electrical Engineering, Technion, Haifa, 32000, Israel
Reithmaier, J.P., Institute of Nanostructure Technologies and Analytics, Technische Physik, CINSaT, University of Kassel, Kassel, D-34132, Germany
Eisenstein, G., Russell Berrie Nanotechnology Institute, Technion, Haifa, 32000, Israel, Andrew and Erna Viterbi Department of Electrical Engineering, Technion, Haifa, 32000, Israel
Funding Details: This work was funded by the Israel Science Foundation (1504/16). I.K. acknowledges Dr. Elena Khanonkin, Ori Eyal, and Shai Tsesses for help in performing the measurements. A.K.M. acknowledges support in part by the Technion and by Israel Council for Higher Education. Israel Science Foundation, ISF: 1504/16; Technion-Israel Institute of Technology; Planning and Budgeting Committee of the Council for Higher Education of Israel, PBC
Corresponding Author: Khanonkin, I.; Russell Berrie Nanotechnology InstituteIsrael; email: ikhanonkin@technion.ac.il
Appears in Collections:Journal Publications [PH]

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