2014/11/13 by P. E. Kremer, Peter E. Kremer, Adetunmise C. Dada +11 · 66 citations
Engineering · Physics and Astronomy · #Antenna (radio) #Excitation #Materials science #Nanowire #Optics #Optoelectronics #Photon #Photonic and Optical Devices #Physics #Quantum dot #Resolution (logic) #Semiconductor Lasers and Optical Devices #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #physics.optics #quant-ph
paper · pdf · doi:10.1103/physrevb.90.201408
published in Physical Review B 90(20) (American Physical Society)
arxiv created 2014/11/13 · openalex publication_date 2014/11/24 · arxiv updated 2016/01/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.