Low-temperature optical and spin spectroscopy of rare-earth-ion-doped materials Coherent light-atom interactions in gaseous and solid state materials Quantum optics Quantum storage devices for single photons Quantum communication/Quantum repeaters Phys. Rev. B 94, 155116 (2016) High-Precision Measurement of the Dzyaloshinsky-Moriya Interaction between Two Rare-Earth Ions in a Solid, Phys. Rev. Lett. 117, 037203 (2016) Noise in optical quantum memories based on dynamical decoupling of spin states, Journal of Modern Optics 0, 1-13 (2016) Demonstration of Light-Matter Micro-Macro Quantum Correlations, Phys. Rev. Lett. 116, 190502 (2016) Towards highly multimode optical quantum memory for quantum repeaters, Phys. Rev. A 93, 032327 (2016) Multiplexed on-demand storage of polarization qubits in a crystal, New Journal of Physics 18, 013006 (2016) Quantum memory for photons, Physics Today 68, 42-47 (2015) Coherent Spin Control at the Quantum Level in an Ensemble-Based Optical Memory, Phys. Rev. Lett. 114, 230502 (2015) Storage of hyperentanglement in a solid-state quantum memory, Optica 2, 279-287 (2015) A source of polarization-entangled photon pairs interfacing quantum memories with telecom photons, New Journal of Physics 16, 093058 (2014)