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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of the asymmetric excited state decay on coherent population trapping

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Borges, H. S. ; Oliveira, M. H. ; Villas-Boas, C. J.
Total Authors: 3
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 7, AUG 2 2017.
Web of Science Citations: 3

Electromagnetically induced transparency (EIT) is an optical phenomenon which allows a drastic modification of the optical properties of an atomic system by applying a control field. It has been largely studied in the last decades and nowadays we can find a huge number of experimental and theoretical related studies. Recently a similar phenomenon was also shown in quantum dot molecules (QDM), where the control field is replaced by the tunneling rate between quantum dots. Our results show that in the EIT regime, the optical properties of QDM and the atomic system are identical. However, here we show that in the strong probe field regime, i.e., ``coherent population trapping{''} (CPT) regime, it appears a strong discrepancy on the optical properties of both systems. We show that the origin of such difference relies on the different decay rates of the excited state of the two systems, implying in a strong difference on their higher order nonlinear susceptibilities. Finally, we investigate the optical response of atom/QDM strongly coupled to a cavity mode. In particular, the QDM-cavity system has the advantage of allowing a better narrowing of the width of the dark state resonance in the CPT regime when compared with atom-cavity system. (AU)

FAPESP's process: 13/04162-5 - Development of quantum sensors based on ultracold atoms
Grantee:Philippe Wilhelm Courteille
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/12740-1 - Quantum memory and cavity electrodynamics in quantum dots coupled by tunneling
Grantee:Halyne Silva Borges
Support type: Scholarships in Brazil - Post-Doctorate