A5073855781- Diamond and Carbon-based Materials Research
- Graphene research and applications
- Semiconductor materials and devices
- Quantum Information and Cryptography
- Photonic and Optical Devices
- Nanowire Synthesis and Applications
- Carbon Nanotubes in Composites
- Nanopore and Nanochannel Transport Studies
- Advanced Fluorescence Microscopy Techniques
- Advanced Thermodynamics and Statistical Mechanics
- Electrochemical Analysis and Applications
- Quantum many-body systems
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Optical Sensing Technologies
- Quantum and electron transport phenomena
- Electrowetting and Microfluidic Technologies
- Force Microscopy Techniques and Applications
- Plasmonic and Surface Plasmon Research
- Olfactory and Sensory Function Studies
- Spectroscopy and Quantum Chemical Studies
- Semiconductor Quantum Structures and Devices
- Electrohydrodynamics and Fluid Dynamics
- Physics of Superconductivity and Magnetism
- 2D Materials and Applications
- Photoacoustic and Ultrasonic Imaging
École Polytechnique Fédérale de Lausanne
2018-2024
University of Lausanne
2019
Moscow Institute of Physics and Technology
2015-2016
National University of Science and Technology
2014-2015
Institute of Physics and Technology
2015
Odessa State Environmental University
1983
Institute of Applied Physics
1981
Point defects can have significant impact on the mechanical, electronic, and optical properties of materials. The development robust, multidimensional, high-throughput, large-scale characterization techniques is thus crucial for establishment integrated nanophotonic technologies material growth optimization. Here, we demonstrate potential wide-field spectral single-molecule localization microscopy (SMLM) determination ensemble as well spatial, spectral, temporal dynamics single in chemical...
Hexagonal boron nitride (hBN) has emerged as a promising material platform for nanophotonics and quantum sensing, hosting optically active defects with exceptional properties such high brightness large spectral tuning. However, precise control over deterministic spatial positioning of emitters in hBN remained elusive long time, limiting their proper correlative characterization applications hybrid devices. Recently, focused ion beam (FIB) systems proved to be useful engineer several types...
Liquids confined down to the atomic scale can show radically new properties. However, only indirect and ensemble measurements operate in such extreme confinement, calling for novel optical approaches that enable direct imaging at molecular level. Here we harness fluorescence originating from single-photon emitters surface of hexagonal boron nitride sensing nanometrically liquids. The emission originates chemisorption organic solvent molecules onto native defects, revealing single-molecule...
Abstract Super-resolution microscopies based on the localization of single molecules have been widely adopted due to their demonstrated performance and accessibility resulting from open software simple hardware. The PAINT method for microscopy offers improved resolution over photoswitching methods, since it is less prone sparse sampling structures provides higher precision. Here, we show that waveguides enable increased throughput data quality PAINT, by generating a highly uniform ~100 ×...
Fluorescent nanoparticles with optically robust luminescence are imperative to applications in imaging and labeling. Here we demonstrate that hexagonal boron nitride (hBN) can be reliably produced using a scalable cryogenic exfoliation technique sizes below 10 nm. The particles exhibit bright fluorescence generated by color centers act as atomic-size quantum emitters. We analyze their optical properties, including emission wavelength, photon-statistics, photodynamics, show they suitable for...
Abstract We report a new approach to controllable thermal stimulation of single living cell and its compartments. The technique is based on the use polycrystalline diamond particle containing silicon-vacancy (SiV) color centers. Due presence amorphous carbon at intercrystalline boundaries, such an efficient light absorber becomes local heat source when illuminated by laser. Furthermore, temperature heater tracked spectral shift zero-phonon line SiV Thus, acts simultaneously as thermometer....
Adapting optical microscopy methods for nanoscale characterization of defects in two-dimensional (2D) materials is a vital step photonic on-chip devices. To increase the analysis throughput, waveguide-based imaging platforms have been recently developed. Their inherent disadvantage, however, necessity to transfer 2D material from growth substrate chip, which introduces nonuniform coverage and contamination, potentially altering results. Here we present unique approach circumvent these...
Single-molecule localization microscopy (SMLM) is a powerful tool that routinely used for nanoscale optical imaging of biological samples. Recently, this approach has been applied to study optically active defects in two-dimensional (2D) materials. Such can not only alter the mechanical and optoelectronic properties 2D materials but also bring new functionalities, which make them promising platform integrated nanophotonics quantum sensing. Most SMLM approaches, however, provide field view...
Abstract In this work, we develop and study superconducting materials for a broadband microwave single-photon detector wide-range applications in quantum devices. Ideal of type should have gap the order 10 GHz (0.2 K), possess normal sheet resistance 50 <?CDATA $\Omega$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi mathvariant="normal">Ω</mml:mi> </mml:math> . We find that Ti/Pt bilayers are good candidates: it enables to vary transition temperature...
Our understanding of the dynamics charge transfer between solid surfaces and liquid electrolytes has been hampered by difficulties in obtaining interface, charge, solvent-specific information at both high spatial temporal resolution. Here, we measure single scale protons interface an hBN crystal binary mixtures water organic amphiphilic solvents (alcohols acetone), evidencing a marked influence solvation on interfacial dynamics. Applying single-molecule localization microscopy to emissive...
We present a practical design and implementation of broadband sample holder suitable for microwave experiments with superconducting integrated circuits at millikelvin temperatures. Proposed can be easily in standard dilution cryostats, has flat pass band response frequency range from 0 to 32 GHz, allowing the RF testing samples substrate size up 4x4 mm. The parasitic higher modes interference structure is analyzed prevented via considerations. developed setup used characterization parametric...
We have successfully applied the resistance grid technique to measure disintegration speed in special type of glass objects, widely known as Prince Rupert's drops.We use a digital oscilloscope and simple electrical circuit, glued surface drops, detect voltage changes, corresponding breaks specific parts drops.The results obtained using this method are good qualitative quantitative agreement with theoretical predictions previously published data.Moreover, proposed experimental setup doesn't...
While interference colors have been known for a long time, conventional color filters large spatial dimensions and cannot be used to create compact pixelized pictures. Here we report simple yet elegant interference-based method of creating microscopic structural pixels using single-mask process standard UV photolithography on an all-dielectric substrate. The technology makes use the varied aperture-controlled physical deposition rate low-temperature silicon dioxide inside hollow cavity...
Introduction The olfactory and trigeminal system are closely interlinked. Existing literature has primarily focused on characterizing stimulation through mechanical chemical stimulation, neglecting thermal thus far. present study aimed to characterize the intranasal sensitivity heat expression of receptors (transient receptor potential channels, TRP). Methods A total 20 healthy participants (aged 21–27 years, 11 women) were screened for function using several tests. Under endoscopic control,...
The loss of the sense smell has not produced as many technological developments to mitigate inconvenience it causes compared vision or hearing. Anosmia hyposmia concerns approximately 20% current European population and is associated with a quality life an increased rate household accidents. Restoring olfaction would therefore be beneficial, but represents challenge. Electrical stimulation nasal cavity triggers sensations that may helpful patients in detecting environmental odorant stimuli....
We report a new approach to controllable thermal stimulation of single living cell and its compartments. The technique is based on the use polycrystalline diamond particle containing silicon-vacancy (SiV) color centers. Due presence amorphous carbon at intercrystalline boundaries, such an efficient light absorber becomes local heat source when illuminated by laser. Furthermore, temperature heater tracked spectral shift zero-phonon line SiV centers [2]. Thus, acts simultaneously as...
We discuss the known construction of two interacting superconducting circuits, based on Josephson junctions, that can be precisely engineered and easily controlled. In particular, we use parametric excitation realized by an instant change qubit coupling, to study entropic information properties density matrix composite system. The is obtained from initial thermal state then analyzed in approximation small perturbation parameter sufficiently low temperature. also check subadditivity condition...
Measurements are made of flow limits and photoluminescence spectra n- p-GaAs deformed by uniaxial tension. It is shown that long-wave radiation bands higher intensity correspond to limit values, the rising due an increase in concentration impurity atom-vacancy complexes (TeAsVGa, SnAs etc.). The data obtained proved calculations according model strengthening crystals complexes. noted p-GaSs no found its lower than having electron-type conductivity. [Russian Text Ignored]