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: Acoustic quantum technologies
Spin-sonics: Acoustic wave gets the electrons spinning
Phys.org July 29, 2021 An international team of researchers (Germany, Canada, USA – Perdue University) has detected the rolling movement of a nano-acoustic wave predicted by Lord Rayleigh in 1885. They used an extremely fine nanowire that was positioned on lithium niobate, a piezoelectric material, which becomes deformed when subjected to an electrical current. With the aid of small metal electrodes, an acoustic wave can be generated on the material. The acoustic wave generates an elliptically rotating electrical field. This, in turn, forces the electrons in the nanowire onto circular paths. So far, this phenomenon was seen in light. Now […]