CC BY 4.0 UnportedLazić, SnežanaEspinha, AndréYanguas, Sergio PinillaGibaja, CarlosZamora, FélixAres, PabloChhowalla, ManishPaz, Wendel S.Palacios Burgos, Juan JoséHernández-Mínguez, AlbertoSantos, Paulo V.van der Meulen, Herko P.2021-10-212021-10-212019https://oa.tib.eu/renate/handle/123456789/7079https://doi.org/10.34657/6126Luminescent defects in hexagonal boron nitride (h-BN) have recently emerged as a promising platform for non-classical light emission. On-chip solutions, however, require techniques for controllable in-situ manipulation of quantum light. Here, we demonstrate the dynamic spectral and temporal tuning of the optical emission from h-BN via moving acousto-mechanical modulation induced by stimulated phonons. When perturbed by the propagating acoustic phonon, the optically probed radiative h-BN defects are periodically strained and their sharp emission lines are modulated by the deformation potential coupling. This results in an acoustically driven spectral tuning within a 2.5-meV bandwidth. Our findings, supported by first-principles theoretical calculations, reveal exceptionally high elasto-optic coupling in h-BN of ~50 meV/%. Temporal control of the emitted photons is achieved by combining the acoustically mediated fine-spectral tuning with spectral detection filtering. This study opens the door to the use of sound for scalable integration of h-BN emitters in nanophotonic and quantum information technologies. © 2019, The Author(s).enghttps://creativecommons.org/licenses/by/4.0/530III-V semiconductorsLightLight emissionNitridesPhononsQuantum opticsDeformation potentialHexagonal boron nitrideHexagonal boron nitride (h-BN)Mechanical modulationNon-classical lightsQuantum information technologiesSpectral detectionTheoretical calculationsArticle