A5075276360- Quantum Information and Cryptography
- Neural Networks and Reservoir Computing
- Dark Matter and Cosmic Phenomena
- Strong Light-Matter Interactions
- Cosmology and Gravitation Theories
- Cold Atom Physics and Bose-Einstein Condensates
- Optical Network Technologies
- Photonic and Optical Devices
- Calibration and Measurement Techniques
- Mechanical and Optical Resonators
- Solid State Laser Technologies
- Particle physics theoretical and experimental studies
- Advanced Fiber Laser Technologies
- Quantum optics and atomic interactions
- Atomic and Subatomic Physics Research
- Laser Material Processing Techniques
- Force Microscopy Techniques and Applications
- Random lasers and scattering media
- Scientific Research and Discoveries
- Nuclear physics research studies
- Astronomical Observations and Instrumentation
- Atmospheric aerosols and clouds
- Experimental and Theoretical Physics Studies
- Semiconductor Quantum Structures and Devices
- Quantum Mechanics and Applications
SRON Netherlands Institute for Space Research
2023-2024
University of Twente
2020-2023
University of Rijeka
2019-2022
Photonic Systems (United States)
2018-2022
Optica
2022
Chan Heart Rhythm Institute
2022
Institute for Nuclear Research
2019
The CAST-CAPP axion haloscope, operating at CERN inside the CAST dipole magnet, has searched for axions in 19.74 $\mu$eV to 22.47 mass range. detection concept follows Sikivie haloscope principle, where Dark Matter convert into photons within a resonator immersed magnetic field. is an array of four individual rectangular cavities inserted strong phase-matched maximize sensitivity. Here we report on data acquired 4124 h from 2019 2021. Each cavity equipped with fast frequency tuning mechanism...
We report on a first measurement with sensitive opto-mechanical force sensor designed for the direct detection of coupling real chameleons to matter. These dark energy candidates could be produced in Sun and stream unimpeded Earth. The KWISP detector installed CAST axion search experiment at CERN looks tiny displacements thin membrane caused by mechanical effect solar chameleons. are detected Michelson interferometer homodyne readout scheme. benefits from focusing action ABRIXAS X-ray...
Josephson junctions are the basis for most sensitive magnetic flux detectors, definition of unit volt by voltage standard, and superconducting digital quantum computing. They result from coupling two coherent states, as they occur in superconductors, superfluids, atomic Bose-Einstein condensates, exciton-polariton condensates. In their ground state, characterised an intrinsic phase jump. Controlling this jump is fundamental applications Here, we experimentally demonstrate controllable...
Abstract The synchronization of coherent states light has long been an important subject basic research and technology. Recently, a new concept for analog computers emerged where this process can be exploited to solve computationally hard problems - potentially faster more energy-efficient than what achieved with conventional computer technology today. unit cell such systems consists two centers that are coupled one another in controlled manner. Here, we experimentally characterize analyze...
Additive Manufacturing (AM) is already well-established for various manufacturing applications, providing many benefits such as design freedom, novel and complex cooling designs the parts different performance improvements, well significantly reducing production time. With mentioned characteristics, AM also being considered a technology Radio Frequency Quadrupole (RFQ) prototype. For this application, an important parameter voltage holding capability of surfaces. Furthermore, pure copper...
Abstract Open quantum systems can be systematically controlled by making changes to their environment. A well-known example is the spontaneous radiative decay of an electronically excited emitter, such as atom or a molecule, which significantly influenced feedback from emitter’s environment, for example, presence reflecting surfaces. prerequisite deliberate control open system reveal physical mechanisms that determine its state. Here, we investigate Bose-Einstein condensation photonic Bose...
Abstract The addition of an optically absorptive layer to otherwise standard dielectric mirrors enables a set laser direct writing nanostructuring methods that can add functionality such while retaining their high reflectivity. A thorough characterization this method is given in paper, and its physical origins are investigated. In particular, these measurements show has reversible permanent component. process originates from the thermal expansion surface allows simple yet precise way...
We report on a new search for solar chameleons with the CERN Axion Solar Telescope (CAST). A GridPix detector was used to soft X-ray photons in energy range from 200 eV 10 keV converted chameleons. No signiffcant excess over expected background has been observed data taken 2014 and 2015. set an improved limit chameleon photon coupling, $\beta_\gamma < 5.7\times10^{10}$ $1<\beta_\mathrm{m}<10^6$ at 95% C.L. improving our previous results by factor two first time reaching sensitivity below...
It has been previously advocated that the presence of daily and annual modulations axion flux on Earth's surface may dramatically change strategy searches. The arguments were based so-called Axion Quark Nugget (AQN) dark matter model which was originally put forward to explain similarity visible cosmological densities $\Omega_{\rm dark}\sim \Omega_{\rm visible}$. In this framework, population galactic axions with mass $ 10^{-6} {\rm eV}\lesssim m_a\lesssim 10^{-3}{\rm eV}$ velocity $\langle...
In February the PACE observatory was launched. Among instruments on board is multi viewport spectropolatimeter SPEXone. The instrument will be used for characterisation and quantification of aerosols in atmosphere. For retrieval aerosol properties it important to observe degree linear polarisation intensity reflected sun light from different viewing angles. Hence need ensure viewports are well aligned ground pixels observed with correctly matched. Once determined results interpreted....
With the increasing availability of single-board computers equipped with fast analog-to-digital converters based on field-programmable gate arrays (FPGA), researchers and educators gain access to relatively inexpensive hardware that can be programmed for advanced coincidence counting. We demonstrate this capability by developing software a dual-channel open-source data acquisition platform, enabling it perform energy- time-resolved counting testing our system using an 241Am source. Measuring...
We report on a first measurement with sensitive opto-mechanical force sensor designed for the direct detection of coupling real chameleons to matter. These dark energy candidates could be produced in Sun and stream unimpeded Earth. The KWISP detector installed CAST axion search experiment at CERN looks tiny displacements thin membrane caused by mechanical effect solar chameleons. are detected Michelson interferometer homodyne readout scheme. benefits from focusing action ABRIXAS X-ray...
In this contribution, the detector-characterization results and some of on-ground calibration plans are presented for an adjusted improved SPEXone satellite instrument. is a highly compact multi-angle space spectro-polarimeter developed by Dutch consortium NASA PACE observatory scheduled launch early 2024. This instrument will enable detailed characterization microphysical properties fine particulate matter or aerosols in atmosphere from low Earth orbit, which essential climate, ecosystem,...
Mechanical elements with dimensions in the nanometer range, at least one direction, have been successfully employed as sensors various devices. Their mechanical properties must be known maximum precision order to quantify sensor response external excitation. This often poses a significant challenge due fragility of elements. Here we present measurement 100 nm thick silicon nitride membrane. The excitation force is provided by laser beam modulated amplitude, while displacement membrane...
The addition of an optically absorptive layer to otherwise standard dielectric mirrors enables a set laser direct writing nanostructuring methods that can add functionality such while retaining their high reflectivity. These are particularly suited for use in optical microcavities, where arbitrary potential landscapes photons may be constructed. Experiments with photon Bose-Einstein condensates, cavity finesse is essential, one area has greatly benefited from this approach. A thorough...