Raphael Nold
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View article: Precise Characterization of a Waveguide Fiber Interface in Silicon Carbide
Precise Characterization of a Waveguide Fiber Interface in Silicon Carbide Open
Spin-active optical emitters in silicon carbide are excellent candidates toward the development of scalable quantum technologies. However, efficient photon collection is challenged by undirected emission patterns from optical dipoles, as w…
View article: Precise characterization of a silicon carbide waveguide fiber interface
Precise characterization of a silicon carbide waveguide fiber interface Open
Emitters in high refractive index materials like 4H-SiC suffer from reduced detection of photons because of losses caused by total internal reflection. Thus, integration into efficient nanophotonic structures which couple the emission of p…
View article: Quantum Optical Microphone in the Audio Band
Quantum Optical Microphone in the Audio Band Open
The ability to perform high-precision optical measurements is paramount to science and engineering. Laser interferometry enables interaction-free sensing with a precision ultimately limited by shot noise. Quantum optical sensors can surpas…
View article: Controlling the Dipole Blockade and Ionization Rate of Rydberg Atoms in Strong Electric Fields
Controlling the Dipole Blockade and Ionization Rate of Rydberg Atoms in Strong Electric Fields Open
We study a hitherto unexplored regime of the Rydberg excitation blockade using highly Stark-shifted, yet long-living, states of Rb atoms subject to electric fields above the classical ionization limit. Such states allow tuning the dipole-d…
View article: Two-photon phase-sensing with single-photon detection
Two-photon phase-sensing with single-photon detection Open
Path-entangled multi-photon states allow optical phase-sensing beyond the shot-noise limit, provided that an efficient parity measurement can be implemented. Realizing this experimentally is technologically demanding, as it requires coinci…