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Updated: Jun 8, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Tunneling effects on fine-structure splitting in quantum-dot molecules
Hanz Y Ramírez1, Shun-Jen Cheng
1Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan, Republic of China.
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, we predict substantial reduction of optical fine-structure splitting without any drop in the optical oscillator strength for the coupled dots with high tunneling rates. This special reduction diminishes the distinguishability of polarized decay paths in cascade emission processes suggesting the use of stacked quantum-dot molecules as entangled photon-pair sources.
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