Phys.org November 21, 2022 An international team of researchers (Spain, Germany) fabricated a dynamically reconfigurable integrated photonic circuit comprising integrated quantum dots (QDs), a Mach-Zehnder interferometer (MZI) and surface acoustic wave (SAW) transducers directly fabricated on a monolithic semiconductor platform to demonstrate on-chip single photon generation by the QD and its sub-nanosecond dynamic on-chip control. Two independently applied SAWs piezo-optomechanically rotated the single photon in the MZI. In the MZI, SAWs imprinted a time-dependent optical phase and modulated the qubit rotation to the output superposition state. This enabled dynamic single photon routing with frequencies exceeding one gigahertz. The combination of […]
Tag Archives: Photonic networks
Light from stretchable sheets of atoms for quantum technologies
EurekAlert April 16, 2020 Unlike other nanomaterials used as quantum light sources, such as diamond, silicon carbide or gallium nitride hexagonal boron nitride is not brittle and comes with the unique stretchable mechanical properties of a van der Waals crystal. However, their spectral inhomogeneity currently limits their potential applications. Researchers in Australia applied tensile strain to quantum emitters embedded in few‐layer hBN films. They observed both red and blue spectral shifts with tuning magnitudes up to 65 meV. Rotation of the optical dipole in response to strain suggested the presence of a second excited state. They developed a theoretical model […]