Tunneling Effects on Fine-Structure Splitting in Quantum Dot Molecules

Abstract

We theoretically study the effects of bias-controlled interdot tunneling in vertically coupled quantum dots on the emission properties of spin excitons in various bias-controlled tunneling regimes. As a main result, for strongly coupled dots we predict substantial reduction of optical fine structure splitting without any drop in the optical oscillator strength. This special reduction diminishes the distinguibility of polarized decay paths in cascade emission processes suggesting the use of stacked quantum dot molecules as entangled photon-pair sources.

12 pages, 4 figures, submitted to a APS journal

References in corpus (8)

• Entangled Photon Pairs from Semiconductor Quantum Dots
• Coherence of an Entangled Exciton-Photon State
• Tunable Noise Cross-Correlations in a Double Quantum Dot
• Measurement of Temporal Correlations of the Overhauser Field in a Double Quantum Dot
• Polarization sensitive spectroscopy of charged Quantum Dots
• Highly-reduced Fine-structure splitting in InAs/InP quantum dots offering efficient on-demand 1.55 $\mu$m entangled photon emitter
• Fine structure and optical pumping of spins in individual semiconductor quantum dots
• Effective tuning of exciton polarization splitting in coupled quantum dots

Cited by in corpus (8)

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• Towards Tripartite Hybrid Entanglement in Quantum Dot Molecules
• Single-particle and collective excitations in quantum wires made up of vertically stacked quantum dots: Zero magnetic field
• Entanglement Dynamics of Molecular Exciton States in Coupled Quantum Dots
• Mechanically induced pseudo-magnetic fields in the excitonic fine structures of droplet epitaxial quantum dots
• The magneto-optics in quantum wires comprised of vertically stacked quantum dots: A calling for the magnetoplasmon qubits
• Single-particle and collective excitations in quantum wires comprised of vertically stacked quantum dots: Finite magnetic field
• Effective quasiparticle approach for a Cavity-QDots System