57 citations · 225 across the 17 of their papers we have counts for
5 papers · 1 filter
Twist-dependent intra- and interlayer excitons in moire MoSe2 homobilayers
Viviana Villafañe, Malte Kremser, Ruven Hübner +7
Optoelectronic properties of van der Waals homostructures can be selectively engineered by the relative twist angle between layers. Here, we study the twist-dependent moire couplin…
Emitter-Optomechanical Interaction in Ultra-High-Q hBN Nanocavities
Chenjiang Qian, Viviana Villafañe, Martin Schalk +6
Integrating quantum emitters into nanocavities which simultaneously couple to the photonic and mechanical modes is critical for interfacing electron spins, photons and phonons in t…
Coupling of MoS Excitons with Lattice Phonons and Cavity Vibrational Phonons in Hybrid Nanobeam Cavities
Chenjiang Qian, Viviana Villafañe, Marko M. Petrić +3
We report resonant Raman spectroscopy of neutral excitons X and intravalley trions X in hBN-encapsulated MoS monolayer embedded in a nanobeam cavity. By temperature tun…
Unveiling the Zero-Phonon Line of the Boron Vacancy Center by Cavity Enhanced Emission
Chenjiang Qian, Viviana Villafañe, Martin Schalk +11
Negatively charged boron vacancies () in hexagonal boron nitride (hBN) exhibit a broad emission spectrum due to strong electron-phonon coupling and Jahn-Teller mixing of ele…
Three-photon excitation of quantum two-level systems
Viviana Villafañe, Bianca Scaparra, Manuel Rieger +8
We demonstrate that semiconductor quantum dots can be excited efficiently in a resonant three-photon process, whilst resonant two-photon excitation is highly suppressed. Time-depen…