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Optical Materials

Effects of electric field and structure on the electromagnetically induced transparency in double quantum dot

Doina Bejan

Published Apr 8, 2017• 21 citations
Publisher
DOI
10.1016/j.optmat.2017.03.031

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The electronic states of InAs/GaAs quantum dot has investigated for vertically-aligned double conical quantum dots molecule (CQDM). We calculated Eigen energies as a function of external voltage, wetting layer thickness and inter-dot spacer. Tunneling-induced transparency (TIT) in vertically coupled InAs/GaAs quantum dots using tunneling instead of pump laser, analogous to electromagnetically induced transparency (EIT) in atomic systems, has studied. The inter-dot quantum coupling strength is tuned by static electric fields. For parameters appropriate to a 100 Gbits/s optical network, slow down factor (SDF) as 109 can be achieved. The scheme is expected to be useful to construct a variable semiconductor optical buffer based on TIT in vertically coupled InAs/GaAs quantum dots controlled by electric fields.

•Jan 1, 2019•0 citations
The electronic states of InAs/GaAs quantum dot has investigated for vertically-aligned double conical quantum dots molecule (CQDM). We calculated Eigen energies as a function of external voltage, wetting layer thickness and inter-dot spacer. Tunneling-induced transparency (TIT) in vertically coupled InAs/GaAs quantum dots using tunneling instead of pump laser, analogous to electromagnetically induced transparency (EIT) in atomic systems, has studied. The inter-dot quantum coupling strength is tuned by static electric fields. For parameters appropriate to a 100 Gbits/s optical network, slow down factor (SDF) as 109 can be achieved. The scheme is expected to be useful to construct a variable semiconductor optical buffer based on TIT in vertically coupled InAs/GaAs quantum dots controlled by electric fields.