Optically driving the radiative Auger transition

Abstract

In a radiative Auger process, optical decay leaves other carriers in excited states, resulting in weak red-shifted satellite peaks in the emission spectrum. The appearance of radiative Auger in the emission directly leads to the question if the process can be inverted: simultaneous photon absorption and electronic demotion. However, excitation of the radiative Auger transition has not been shown, neither on atoms nor on solid-state quantum emitters. Here, we demonstrate the optical driving of the radiative Auger transition, linking few-body Coulomb interactions and quantum optics. We perform our experiments on a trion in a semiconductor quantum dot, where the radiative Auger and the fundamental transition form a Λ-system. On driving both transitions simultaneously, we observe a reduction of the fluorescence signal by up to 70%. Our results suggest the possibility of turning resonance fluorescence on and off using radiative Auger as well as THz spectroscopy with optics close to the visible regime.

Unveiling the spin-singlet states of two electron-hole pair complexes using two-photon excitation in a GaAs/AlAs quantum dot

“…This TPE process can be extended to the case of charged quantum dots, opening the way to optical control of the electronic spin localized on higher-energy orbital levels [30].…”

Epitaxial quantum dots: a semiconductor launchpad for photonic quantum technologies

“…Coulomb interactions between electrons result in the Auger process [386,387] and radiative Auger process [388,389] . The radiative Auger process exists in both photon emission and absorption, in analogy to a Raman transition.…”

“…The radiative Auger process exists in both photon emission and absorption, in analogy to a Raman transition. Exploiting the radiative Auger process might facilitate control of different orbital states and performing THz spectroscopy using optics in the near-visible range [389] . Excitons have a dominantly heavy-hole character in self-assembled InGaAs quantum dots and GaAs quantum dots.…”

Experimental determination of Sn L -shell atomic parameters

“…Different approaches have been introduced in this kind of calculations to account for 3d K hypersatellite emissions [3,18,19], with uneven comparisons with experimental values [20]. Finally, some effort has been devoted to characterize the structures related with the radiative Auger effect (RAE) associated to K shells [21,22], a phenomenon which has recently drawn the attention for the case of isolated quantum structures [23,24]. However, experimental and theoretical data related to RAE bands corresponding to L shells are scarcely found in the literature.…”