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- W27698085 abstract "We investigate plasmon excitations in a quantum wire that consists of an infinite one-dimensional array of vertically coupled $mathrm{In}mathrm{As}∕mathrm{Ga}mathrm{As}$ strained quantum dots (QDs). The research is carried out in the framework of random-phase approximation using effective-mass theory. Our formalism is capable of studying plasmons with strong tunneling among QDs, which frustrate the conventionally adopted tight-binding approximation. Based on this formalism, a systematic study on the intraminiband or intrasubband plasmon in vertically coupled $mathrm{In}mathrm{As}∕mathrm{Ga}mathrm{As}$ strained QDs is presented. It is found that an increase of the dot spacing will inevitably reduce the plasmon energy. In contrast, the role of dot height is relatively complex and depends on the dot spacing. The results demonstrate the possibility to engineer collective excitations in low dimensional systems by simply changing their geometric configuration." @default.
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- W27698085 date "2007-08-28" @default.
- W27698085 modified "2023-10-18" @default.
- W27698085 title "Plasmons in vertically coupledInAs∕GaAsquantum dots" @default.
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- W27698085 doi "https://doi.org/10.1103/physrevb.76.075345" @default.
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