Selective control of single quantum dots with surface acoustic waves
Phys. Rev. Applied 24, 054051 – Published 18 November, 2025
DOI: https://doi.org/10.1103/4wmx-dr1g
Abstract
Semiconductor quantum dots (QDs) play a crucial role in quantum information technologies, particularly in the development of quantum light sources and spin-photon interfaces. Precise control over exciton states is essential to achieve spatial selectivity, ultrafast response, and scalable multinode architectures. Here, we demonstrate selective QD modulation using interdigital transducers with a frequency gradient that combine strain coupling via surface acoustic waves (SAWs) and dynamic quantum-confined Stark effects. By engineering position-dependent SAW eigenfrequencies and localized dynamic electric fields, we achieve selective activation of strain-induced symmetric broadening and electric-field-driven splitting for single QDs. In addition, integration with external magnetic fields further enhances the modulation range. This work establishes a multifunctional QD modulation platform that integrates acoustic, electric, and magnetic control strategies for scalable quantum photonic networks.
