Strain-tunable quantum dot embedded in a nanowire antenna

Article

关键词: SINGLE-PHOTON SOURCES;    LINEAR OPTICS;    SPIN;    SEMICONDUCTOR;    EMISSION;    LIGHT;   

DOI  :  10.1103/PhysRevB.90.201408

来源: SCIE

【 摘 要 】

We demonstrate an elastically tunable self-assembled quantum dot in a nanowire antenna that emits single photons with resolution-limited spectral linewidths. The single-photon device is composed of a single quantum dot embedded in a top-down fabricated nanowire waveguide integrated onto a piezoelectric actuator. Nonresonant excitation leads to static (fluctuating) charges likely at the nanowire surface, causing DC Stark shifts (inhomogeneous broadening); for low excitation powers, the effects are not observed, and resolution-limited linewidths are obtained. Despite significant strain-field relaxation in the high-aspect-ratio nanowires, we achieve up to 1.2-meV tuning of a dot's transition energy. Single-photon sources with high brightness, resolution-limited linewidths, and wavelength tunability are promising for future quantum technologies.

【 授权许可】

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