A5053885232- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Frequency and Time Standards
- Spectroscopy and Chemometric Analyses
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Information and Cryptography
- Atomic and Subatomic Physics Research
- Water Quality Monitoring and Analysis
- Quantum optics and atomic interactions
- Listeria monocytogenes in Food Safety
- Advanced Chemical Sensor Technologies
- Advanced Fiber Laser Technologies
- Advanced Optical Sensing Technologies
- Photonic Crystal and Fiber Optics
- Scientific Measurement and Uncertainty Evaluation
- Atomic and Molecular Physics
- Spectroscopy and Laser Applications
- Analytical Chemistry and Sensors
- Bacterial Identification and Susceptibility Testing
- Nuclear physics research studies
- bioluminescence and chemiluminescence research
- Bacillus and Francisella bacterial research
- Mass Spectrometry Techniques and Applications
- Pesticide Residue Analysis and Safety
- Photorefractive and Nonlinear Optics
- Ion-surface interactions and analysis
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2017-2021
Physikalisch-Technische Bundesanstalt
2011-2018
Technische Universität Braunschweig
2011
We demonstrate an efficient high-precision optical spectroscopy technique for single trapped ions with non-closed transitions. In a double-shelving technique, the absorption of photon is first amplified to several phonons normal motional mode shared co-trapped cooling ion different species, before being further thousands fluorescence photons emitted by using standard electron shelving technique. employ this extension recoil perform high precision absolute frequency measurement...
Cold molecular ions are promising candidates in various fields ranging from precision spectroscopy and test of fundamental physics to ultracold chemistry. Control internal external degrees freedom is a prerequisite for many these applications. Motional-ground-state cooling represents the starting point quantum logic-assisted state preparation, detection, protocols. Robust fast crucial maximize fraction time available actual experiment. We optimize rate ground-state schemes single...
Transmission of UV light with high beam quality and pointing stability is desirable for many experiments in atomic, molecular optical physics.In particular, laser cooling coherent manipulation trapped ions transitions the require stable, single-mode delivery.Transmitting even ~2 mW CW at 280 nm through silica solid-core fibers has previously been found to cause transmission degradation after just a few hours due damage.We show that photonic crystal fiber kagomé type can be used effectively...
Abstract Biological hazardous substances such as certain fungi and bacteria represent a high risk for the broad public if fallen into wrong hands. Incidents based on bio-agents are commonly considered to have unpredictable complex consequences first responders people. The impact of an event can be minimized by early fast detection hazards. presented approach is optical standoff applying laser-induced fluorescence (LIF) bacteria. LIF bio-detector has been designed outdoor operation at...
Protocols used in quantum information and precision spectroscopy rely on efficient internal state discrimination. With a single ion linear Paul trap, we implement novel detection method which utilizes correlations between two events with an intermediate spin-flip. The technique is experimentally characterized as more robust against fluctuations laser power compared to conventionally implemented methods. Furthermore, systematic errors limit the Rabi oscillation contrast conventional methods...
Efficient preparation and detection of the motional state trapped ions is important in many experiments ranging from quantum computation to precision spectroscopy. We investigate stimulated Raman adiabatic passage (STIRAP) technique for manipulation states a ion system. The presented uses coupling between two hyperfine ground 25Mg+, implemented with delayed pulses, which removes single phonon independent initial state. show that thermal probability distribution STIRAP population transfer...
Laser-induced fluorescence (LIF) is a well-established technique for monitoring chemical processes and the standoff detection of biological substances because its simple technical implementation high sensitivity. Frequently, LIF spectra from large molecules bio-agents are only slightly structured gain deeper information, such as classification, let alone identification, might become challenging. Improving technology by recording spectral additionally time-resolved emission, significant...
experiment. We optimize the cooling rate of ground state schemes for single 25 Mg + ions and sympathetic 24 MgH . In particular, we show that robust is achieved by combining pulsed Raman sideband with continuous quench cooling. Furthermore, experimentally demonstrate an efficient strategy outside Lamb-Dicke regime.
Abstract The phonons and the crystal structure of complex hydride LiBH 4 are studied on single crystals using micro‐Raman spectroscopy. symmetry modes is determined by polarization‐dependent measurements at liquid helium temperature, allowing a better comparison more reliable assignment to computed phonon wavenumbers. This has led revision some former assignments made from Raman polycrystalline samples. In addition, higher integration time allowed detection very weak lines, so that 35 out 36...
Abstract Chemical contamination of objects and surfaces, caused by accident or on purpose, is a common security issue. Immediate countermeasures depend the class risk consequently characteristics substances. Laser‐based standoff detection techniques can help to provide information about thread without direct contact humans hazardous materials. This article explains data acquisition classification procedure for laser‐induced fluorescence spectra several chemical agents. The substances are...
Regulations of safety usage hazardous substances impose companies to monitor their emissions. A novel approach determines the mass concentration Cr(VI) in exhaust airflow based on angular light scattering combined with machine learning algorithms.
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text M. H. Frosz, F. Gebert, A. Ermolov, N. Y. Joly, P. O. Schmidt, and S. J. Russell, "Hollow-core photonic crystal fibres for effectively single-mode UV transmission," in Workshop Specialty Optical Fibers their Applications, (Optica Publishing Group, 2013), paper F2.5. Export BibTex Endnote (RIS) HTML Plain alert Save article