Lev Kazak
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View article: Photoactivation of NV Centers in Diamond via Continuous Wave Laser Illumination of Shallow As‐Implanted Nitrogen
Photoactivation of NV Centers in Diamond via Continuous Wave Laser Illumination of Shallow As‐Implanted Nitrogen Open
Negatively charged nitrogen‐vacancy (NV − ) centers in diamond are appealing for quantum sensing applications due to their environmental sensitivity and long coherence times. Precise and scalable shallow color center creation is essential …
View article: Bottom-up Synthesis of Molecular and Fluorescent Nanodiamonds from Nanographene
Bottom-up Synthesis of Molecular and Fluorescent Nanodiamonds from Nanographene Open
Nanodiamonds with colour centres have the potential to transform a wide range of disciplines, including quantum computation1,2, surface NMR spectroscopy3–6, single-spin magnetometry7,8, widefield quantum microscopy9, and single photon sour…
View article: Discovery of ST2 centers in natural and CVD diamond
Discovery of ST2 centers in natural and CVD diamond Open
The ST2 center is an optically addressable point defect in diamond that facilitates spin initialization and readout. However, while this study presents the discovery of ST2 centers first observed in a natural diamond and provides a reliabl…
View article: Strong field induced ion and electron emission from size-selected metal clusters
Strong field induced ion and electron emission from size-selected metal clusters Open
Single-sized clusters of Ag309− are accumulated within a digital Paul trap and exposed to intense optical laser pulses, leading to the formation of nanoplasmas of known initial conditions, not yet feasible. Using field-free diagnostics, th…
View article: Revealing the Origin of Fast Delayed Fluorescence in a Donor Functionalized Bisterpyridine
Revealing the Origin of Fast Delayed Fluorescence in a Donor Functionalized Bisterpyridine Open
A new carbazole‐substituted bisterpyridine with pronounced delayed fluorescence is presented. While the molecular donor‐acceptor‐donor design suggests the origin of this to be thermally activated delayed fluorescence (TADF), results from v…
View article: Transform-Limited Photon Emission From a Lead-Vacancy Center in Diamond Above 10 K
Transform-Limited Photon Emission From a Lead-Vacancy Center in Diamond Above 10 K Open
Transform-limited photon emission from quantum emitters is essential for high-fidelity entanglement generation. In this study, we report the coherent optical property of a single negatively-charged lead-vacancy (PbV) center in diamond. Pho…
View article: Development of ion recoil energy distributions in the Coulomb explosion of argon clusters resolved by charge-state selective ion energy spectroscopy
Development of ion recoil energy distributions in the Coulomb explosion of argon clusters resolved by charge-state selective ion energy spectroscopy Open
The laser intensity dependence of the recoil energies from the Coulomb explosion of small argon clusters has been investigated by resolving the contributions of the individual charge states to the ion recoil energy spectra. Between $$10^{1…
View article: Photoelectron Spectroscopy on Magnesium Ensembles in Helium Nanodroplets
Photoelectron Spectroscopy on Magnesium Ensembles in Helium Nanodroplets Open
The special conditions provided by the ultracold and liquid environment of helium nanodroplets allow the formation of unusual and unique structures from embedded complexes. A recent example is magnesium atoms, which show evidence for the f…
View article: Optical probing of high intensity laser interaction with micron-sized cryogenic hydrogen jets
Optical probing of high intensity laser interaction with micron-sized cryogenic hydrogen jets Open
Probing the rapid dynamics of plasma evolution in laser-driven plasma interactions provides deeper understanding of experiments in the context of laser-driven ion acceleration and facilitates the interplay with complementing numerical inve…
View article: A sensitive EUV Schwarzschild microscope for plasma studies with sub-micrometer resolution
A sensitive EUV Schwarzschild microscope for plasma studies with sub-micrometer resolution Open
We present an extreme ultraviolet (EUV) microscope using a Schwarzschild objective which is optimized for single-shot sub-micrometer imaging of laser-plasma targets. The microscope has been designed and constructed for imaging the scatteri…
View article: The interaction of intense femtosecond laser pulses with argon microdroplets studied near the soft x-ray emission threshold
The interaction of intense femtosecond laser pulses with argon microdroplets studied near the soft x-ray emission threshold Open
The extreme ultraviolet plasma emission from liquid microsized argon droplets exposed to intense near-infrared laser pulses has been investigated. Emission from the warm dense matter targets is recorded in a spectral range in between 16 an…
View article: Efficient laser-driven proton acceleration from cylindrical and planar cryogenic hydrogen jets
Efficient laser-driven proton acceleration from cylindrical and planar cryogenic hydrogen jets Open
We report on recent experimental results deploying a continuous cryogenic hydrogen jet as a debris-free, renewable laser-driven source of pure proton beams generated at the 150 TW ultrashort pulse laser Draco. Efficient proton acceleration…