Enhanced strong interaction between nanocavities and p-shell excitons beyond the dipole approximation

Qian, C. et al. (2019) Enhanced strong interaction between nanocavities and p-shell excitons beyond the dipole approximation. Physical Review Letters, 122(8), 087401. (doi:10.1103/PhysRevLett.122.087401)

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Abstract

Large coupling strengths in exciton-photon interactions are important for the quantum photonic network, while strong cavity–quantum dot interactions have been focused on s-shell excitons with small coupling strengths. Here we demonstrate strong interactions between cavities and p-shell excitons with a great enhancement by the in situ wave-function control. The p-shell excitons are demonstrated with much larger wave-function extents and nonlocal interactions beyond the dipole approximation. Then the interaction is tuned from the nonlocal to the local regime by the wave function shrinking, during which the enhancement is obtained. A large coupling strength of 210     μ eV has been achieved, indicating the great potential of p-shell excitons for coherent information exchange. Furthermore, we propose a distributed delay model to quantitatively explain the coupling strength variation, revealing the intertwining of excitons and photons beyond the dipole approximation.

Item Type:Articles
Additional Information:This work was supported by the National Basic Research Program of China under Grant No. 2016YFA0200400; the National Natural Science Foundation of China under Grants No. 11721404, No. 51761145104, No. 61675228, and No. 61390503; the Strategic Priority Research Program of the Chinese Academy of Sciences under Grants No. XDB07030200, No. XDB28000000, and No. XDB07020200; the Key Research Program of Frontier Sciences of CAS under Grant No. QYZDJ-SSWSLH042; the Instrument Developing Project of CAS under Grant No. YJKYYQ20180036 and the CAS Interdisciplinary Innovation Team.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Thayne, Professor Iain and Steer, Dr Matthew
Authors: Qian, C., Xie, X., Yang, J., Peng, K., Wu, S., Song, F., Sun, S., Dang, J., Yu, Y., Steer, M. J., Thayne, I. G., Jin, K., Gu, C., and Xu, X.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114
Published Online:27 February 2019
Copyright Holders:Copyright © 2019 American Physical Society
First Published:First published in Physical Review Letters 122(8): 087401
Publisher Policy:Reproduced in accordance with the publisher copyright policy
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