Dipolariton Formation in Quantum Dot Molecules Strongly Coupled to Optical Resonators

Marlon S Domínguez,David F Macias-Pinilla,Hanz Y Ramírez

doi:10.1155/2019/7916823

Marlon S Domínguez, David F Macias-Pinilla + Show 1 more

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https://doi.org/10.1155/2019/7916823

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Abstract

In this theoretical work, we study a double quantum dot interacting strongly with a microcavity, while undergoing resonant tunneling. Effects of interdot tunneling on the light-matter hybridized states are determined, and tunability of their brightness degrees, associated dipole moments, and lifetimes is demonstrated. These results predict dipolariton generation in artificial molecules coupled to optical resonators and provide a promising scenario for the control of emission efficiency and coherence times of exciton polaritons.

Highlights

In recent years, interest for light generation from lowdimensional structures coupled to electrodynamics cavities has increased noticeably [1,2,3]
Those high-quality nanostructured semiconductors that can be obtained by molecular beam epitaxy (MBE) or chemical vapor deposition (CVD) [7] have exhibited relevant atom-like phenomena such as Rabi oscillations [8, 9], Mollow triplet in resonance fluorescence [10, 11], Dicke effect [12, 13], and double dressing resonances [14, 15]
We study the properties at the small photon number scale of exciton polaritons” (EPs) modes for a double-quantum dot (DQD) embedded in a microcavity, in such a way that interdot coupling and strong radiation-matter interaction are simultaneously considered and formation of polaritons with adjustable dipole moment and reduced brightness is explored [32]

Summary

Introduction

Interest for light generation from lowdimensional structures coupled to electrodynamics cavities has increased noticeably [1,2,3]. Strong radiation-matter coupling for a QD inside either planar or photonic crystal cavities has been successfully observed and progressively improved along this century, including electron spin states in charged excitons [10, 18, 21, 22]. Recent experiments have taken advantage of interdot coupling in artificial molecules within QED cavities, for the enhancement of hybrid qubits [28], for the manipulation of light-matter interaction with superconducting resonators [29], for the improvement of single-photon emission [30], and for the observation of phonon-assisted cavity feeding [31].

Results

Conclusion