Science Daily June 1, 2023 Quantum light sources in which coupling between single photons and phonons can be controlled and harnessed enables quantum information transduction. Researchers at the University of Washington created quantum emitters featuring highly tunable coupling between excitons and phonons. The quantum emitters were formed in strain-induced quantum dots created in homobilayer WSe2. The colocalization of quantum-confined interlayer excitons and terahertz interlayer breathing-mode phonons, which directly modulated the exciton energy, led to a uniquely strong phonon coupling to single-photon emission. Due to the vertical dipole moment of the interlayer exciton, the phonon–photon interaction was electrically tunable to be […]
Tag Archives: Quantum light source
Quantum light source goes fully on-chip, bringing scalability to the quantum cloud
Nanowerk April 17, 2023 The quantum light sources developed so far have relied on external bulky excitation lasers, making them impractical prototype devices that are not reproducible, hindering their scalability and transfer out of the laboratory into real-world applications. An international team of researchers (Germany, the Netherlands) demonstrated a fully integrated quantum light source that overcame these challenges through the integration of a laser cavity, a highly efficient tunable noise suppression filter and a nonlinear microring for entangled photon-pair generation through spontaneous four-wave mixing. The hybrid quantum source employed an electrically pumped InP gain section and a Si3N4 low-loss microring […]
Pristine Quantum Light Source Created at the Edge of Silicon Chip
IEEE Spectrum October 10, 2018 Researchers at the University of Maryland injected light into a chip containing an array of miniscule silicon loops arranged in a way that always allows the light to travel undisturbed around the edge of the chip, even if fabrication defects are present. The light circulates around each loop thousands of times before moving on to a neighboring loop. The relatively long journey is necessary to get many pairs single photons out of the silicon chip. Their quantum light source reliably produced high quality, single-color photons time and again, whereas the conventional chip’s output was more […]