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Theoretical research demonstrates optical effects in quantum dot molecules in coupled cavities, indicating potential for optical devices.
Optical properties in quantum dot molecules (QDMs), which are implanted in coupled cavities, are researched theoretically. The QDMs are composed of three QDs, and a multi‐level system, including direct and indirect excitons, which can be formed due to tunneling effects therein. Under the strong coupling condition, double Autler‐Townes splitting (ATS) occurs. Then, we implant the QDMs in the coupled cavities, and double Vacuum‐Rabi splitting (VBS) is created together. Four transparency windows are demonstrated. Moreover, the effects of the coupling strengths and frequency detunings on the system absorption spectrum are discussed. Especially, the group index in QDMs controlled by the coupling strengths are explored and group velocity with a reduced factor of 10 6 is revealed. Such a system may be used in on‐chip QD‐based optical devices.
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Liu et al. (2026) studied this question.
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