研究目的
Investigating the control of barrier transparency in InAs/InP nanowire quantum dots via the electrostatic control of the device electron states.
研究成果
The study demonstrates that the evolution of tunneling rates in InAs/InP quantum dots at small filling numbers displays a filling threshold leading to resonances with larger amplitude, understood in terms of the occupation of orbital states originating from different axial subbands. This indicates an effective route to continuous and controllable tuning of the tunnel coupling in heterostructured nanowire systems.
研究不足
The study is limited by the approximations used in the single-particle picture, where band bending inside the quantum dot and at the nanowire surface was not taken into account. Additionally, the presence of level crossings between strongly- and weakly-coupled orbitals could lead to unresolved hybridization effects.