Ronald Ulbricht
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View article: Identifying high-energy electronic states of NV$^-$ centers in diamond
Identifying high-energy electronic states of NV$^-$ centers in diamond Open
The negatively charged nitrogen-vacancy center in diamond is a prototype photoluminescent point defect spin qubit with promising quantum technology applications, enabled by its efficient optical spin polarization and readout. Its low-lying…
View article: The mechanism of charge transfer between quantum dots and redox molecules
The mechanism of charge transfer between quantum dots and redox molecules Open
Charge transfer between quantum dots (QDs) and redox molecules is not well described by the Marcus theory, the hall-mark theory for charge transfer in molecular systems. The Marcus inverted region, where the rate decreases with increasing …
View article: Towards high-sensitivity magnetometry with nitrogen vacancy centers in diamond using the singlet infrared absorption
Towards high-sensitivity magnetometry with nitrogen vacancy centers in diamond using the singlet infrared absorption Open
The negatively-charged nitrogen vacancy (NV$^{-}$) center in diamond is widely used for quantum sensing since the sensitivity of the spin triplet in the electronic ground state to external perturbations such as strain and electromagnetic f…
View article: The phonon-modulated Jahn–Teller distortion of the nitrogen vacancy center in diamond
The phonon-modulated Jahn–Teller distortion of the nitrogen vacancy center in diamond Open
View article: Nitrogen-vacancy centers in diamond: discovery of additional electronic states
Nitrogen-vacancy centers in diamond: discovery of additional electronic states Open
Nitrogen-vacancy (NV) defect centers in diamond are key to applications in quantum sensing and quantum computing. They create localized electronic states in the diamond lattice with distinct population relaxation pathways following photoex…
View article: Broadband transient absorption spectroscopy using an incoherent white-light source as probe
Broadband transient absorption spectroscopy using an incoherent white-light source as probe Open
Time-resolved spectroscopy and, in particular, transient absorption methods have been widely employed to study the dynamics of materials, usually achieving time resolution down to femtoseconds with measurement windows up to a few nanosecon…
View article: Rapid multiplex ultrafast nonlinear microscopy for material characterization
Rapid multiplex ultrafast nonlinear microscopy for material characterization Open
We demonstrate rapid imaging based on four-wave mixing (FWM) by assessing the quality of advanced materials through measurement of their nonlinear response, exciton dephasing, and exciton lifetimes. We use a WSe$_2$ monolayer grown by chem…
View article: Coherent Interactions Between Silicon-Vacancy Centers in Diamond
Coherent Interactions Between Silicon-Vacancy Centers in Diamond Open
We report coherent interactions within an ensemble of silicon-vacancy color centers in diamond. The interactions are ascribed to resonant dipole-dipole coupling. Further, we demonstrate control over resonant center pairs by using a driving…
View article: Gigahertz Optomechanical Modulation by Split-Ring-Resonator Nanophotonic Meta-Atom Arrays
Gigahertz Optomechanical Modulation by Split-Ring-Resonator Nanophotonic Meta-Atom Arrays Open
Using polarization-resolved transient reflection spectroscopy, we investigate a metasurface consisting of coherently vibrating nanophotonic U-shaped split-ring meta-atoms that exhibit colocalized optical and mechanical resonances. With an …
View article: Erratum: Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy [Rev. Mod. Phys. <b>83</b>, 543 (2011)]
Erratum: Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy [Rev. Mod. Phys. <b>83</b>, 543 (2011)] Open
Received 23 February 2017DOI:https://doi.org/10.1103/RevModPhys.89.029901© 2017 American Physical Society
View article: Jahn-Teller-induced femtosecond electronic depolarization dynamics of the nitrogen-vacancy defect in diamond
Jahn-Teller-induced femtosecond electronic depolarization dynamics of the nitrogen-vacancy defect in diamond Open