A5072197936- Diamond and Carbon-based Materials Research
- Ion-surface interactions and analysis
- Force Microscopy Techniques and Applications
- Advanced Fiber Laser Technologies
- Metal and Thin Film Mechanics
- Photonic and Optical Devices
- Analytical Chemistry and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Electronic and Structural Properties of Oxides
- Plasmonic and Surface Plasmon Research
- Advanced Surface Polishing Techniques
- Near-Field Optical Microscopy
- Nonlinear Optical Materials Studies
- High-pressure geophysics and materials
University of Siegen
2019-2024
Silicon-vacancy (SiV) centers in diamond are gaining an increased interest for application, such as quantum technologies and sensing. Due to the strong luminescence concentrated its sharp zero-phonon line at room temperature, SiV being investigated single-photon sources communication, also temperature probes Here, we discussed strategies fabrication of based on Si-ion implantation followed by thermal activation. color high-quality single crystals have best optical properties, but...
Single-color centers in thin polycrystalline diamond membranes allow the platform to be used integrated quantum photonics, hybrid systems, and other complex functional materials. While single-crystal are still technologically challenging fabricate as they cannot grown on a non-diamond substrate, free-standing can conveniently fabricated at large-scale from nanocrystalline seeds substrate that selectively etched. However, their practical application for photonics is so far limited by...
The controlled creation of quantum emitters in diamond represents a major research effort the fabrication single-photon devices. Here, we present scalable production silicon-vacancy (SiV) color centers single-crystal by ion implantation. lateral position SiV is spatially 1-$\mu$m pinhole placed front sample, which can be moved nanometer precise using piezo stage. initial implantation monitoring beam with camera. Hereby, silicon ions are implanted at desired spots an area comparable to...
Silicon-vacancy (SiV) color centers in diamond offer novel possibilities to probe light-matter interaction nano-quantum optics and provide a scalable quantum system suitable for single-photon emission. However, their effective count-rate is still limited by non-radiative decay channels, radiation at wide angles total internal reflection the interface. Recently optical antennas have been utilized order modify nanoscale. Acting as resonators, they are able increase spontaneous emission rate of...
Optical antennas are nanostructures that introduce unprecedented possibilities for light–matter interaction at the nanoscale. An appropriately tailored plasmonic antenna can enhance total radiative decay rate and modify angular radiation pattern of a single‐quantum emitter through controlled near‐field coupling. Despite their ability to surpass fundamental diffraction limit confine electromagnetic field tiny mode volume, fabricating 3D sharp scanning nanoscale structures with desired aspect...
We discuss theoretical and experimental results on the ultrafast detection of quantum emitters. employ nano-antennas, specifically gold nanocones, to accelerate spontaneous emission rate silicon-vacancy color centers in diamond by orders magnitude generate single photons with picoseconds timescales. Moreover, we implement an optical Kerr shutter under tight focusing be able detect such time resolutions down a few hundreds femtoseconds.