A5060622676- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Spectroscopy Techniques in Biomedical and Chemical Research
- Laser-induced spectroscopy and plasma
- Terahertz technology and applications
- Spectroscopy and Laser Applications
- Laser-Plasma Interactions and Diagnostics
- Optical Network Technologies
- Photoreceptor and optogenetics research
- Nonlinear Optical Materials Studies
- Spectroscopy and Quantum Chemical Studies
- Atomic and Molecular Physics
- Laser Design and Applications
- Photochromic and Fluorescence Chemistry
- Gyrotron and Vacuum Electronics Research
- Spectroscopy and Chemometric Analyses
- Photonic and Optical Devices
- Diamond and Carbon-based Materials Research
- Mass Spectrometry Techniques and Applications
- Advanced Fiber Optic Sensors
- Solid State Laser Technologies
- Silicon Nanostructures and Photoluminescence
- Gold and Silver Nanoparticles Synthesis and Applications
- Neurobiology and Insect Physiology Research
Lomonosov Moscow State University
2015-2024
Russian Quantum Center
2014-2024
Kurchatov Institute
2017-2024
Moscow State University
2005-2023
Kazan State Technical University named after A. N. Tupolev
2017-2022
National University of Science and Technology
2021
National University of Science and Technology
2015
TU Wien
2008-2011
International University in Moscow
1996-2010
Institute of Spectroscopy
2001
Abstract Filamentation of ultrashort laser pulses in the atmosphere offers unique opportunities for long-range transmission high-power radiation and standoff detection. With critical power self-focusing scaling as wavelength squared, quest longer-wavelength drivers, which would radically increase peak and, hence, energy a single filament, has been ongoing over two decades, during time available sources limited filamentation experiments to near-infrared visible ranges. Here, we demonstrate...
Filamentation-assisted pulse compression in the gas phase is shown to enable generation of subterawatt few-cycle pulses mid-infrared (mid-IR). With both spatial modulation instabilities and excessive plasma scattering mid-IR beam prevented through a careful choice pressure input peak power, providing single-filament regime propagation, powers as high 0.3 TW are achieved truly single-mode, almost diffraction-limited 35 fs output at central wavelength 4 μm. Applications molecular spectroscopy,...
Abstract Thermogenetics is a promising innovative neurostimulation technique, which enables robust activation of neurons using thermosensitive transient receptor potential (TRP) cation channels. Broader application this approach in neuroscience is, however, hindered by limited variety suitable ion channels, and low spatial temporal resolution neuronal when TRP channels are activated ambient temperature variations or chemical agonists. Here, we demonstrate rapid, reproducible repeated snake...
The electron spin of nitrogen--vacancy (NV) centers in diamond offers a solid-state quantum bit and enables high-precision magnetic-field sensing on the nanoscale. Implementation these approaches fiber format would offer unique opportunities for broad range technologies ranging from information to neuroscience bioimaging. Here, we demonstrate an ultracompact fiber-optic probe where microcrystal with well-defined orientation quantization NV axes is attached tip, allowing spins be manipulated,...
A high-energy supercontinuum spanning 4.7 octaves, from 250 to 6500 nm, is generated using a 0.3-TW, 3.9-μm output of mid-infrared optical parametric chirped-pulse amplifier as driver inducing laser filament in the air. The high-frequency wing spectrum enhanced by odd-order harmonics driver. Optical up 15th order are observed spectra overlapping, yet well-resolved peaks broadened, verified numerical modeling, due spatially nonuniform ionization-induced blue shift.
Combined optical nonlinearity of bound and free electrons in a fast-ionizing medium driven by ultrashort, mid-infrared (mid-IR) pulses gives rise to vast variety ultrafast nonlinear-optical scenarios, producing bright, broadband radiation spectral ranges as different ultraviolet (UV) terahertz (THz). Given its enormous bandwidth, quantitative experimental analysis this type nonlinear response is anything but simple. Here, we confront challenge ultrabroadband measurements performed across the...
Abstract Thermal activation of transient receptor potential (TRP) cation channels is one the most striking examples temperature-controlled processes in cell biology. As evidence indicating fundamental role such thermosensation builds at a fast pace, adequately accurate tools that would allow heat logic behind to be examined on single-cell level are great demand. Here, we demonstrate specifically designed fiber-optic probe enables thermal with simultaneous online thermometry individual cells...
We demonstrate a scanning fiber-optic probe for magnetic-field imaging where nitrogen-vacancy (NV) centers are coupled to an optical fiber integrated with two-wire microwave transmission line. The electron spin of NV in diamond microcrystal attached the tip is manipulated by frequency-modulated field and initialized laser radiation transmitted through tract probe. two-dimensional profile magnetic imaged high speed sensitivity using photoluminescence spin-readout return from centers, captured...
We identify and experimentally demonstrate a physical scenario whereby high-peak-power mid-infrared (mid-IR) pulses can be compressed as part of their free-beam spatiotemporal evolution within the regions anomalous dispersion in air to yield few-cycle subterawatt field waveforms. Unlike filamentation-assisted pulse compression, pulse-compression identified this work does not involve any noticeable ionization air, enabling whole-beam self-compression mid-IR laser without ionization-induced...
We demonstrate fiber-optic magnetometry using a random ensemble of nitrogen-vacancy (NV) centers in nanodiamond coupled to tapered optical fiber, which provides waveguide delivery fields for the initialization, polarization, and readout electron spin NV centers.
Optically detected electron spin resonance in fiber-coupled nitrogen-vacancy (NV) centers of diamond is used to demonstrate a fiber-optic quantum thermometry individual thermogenetically activated neurons. Laser-induced temperature variations read out from single neurons with the NV-diamond fiber sensor are shown strongly correlate fluorescence calcium-ion sensors, serving as online indicators inward Ca2+ current across cell membrane expressing transient receptor potential (TRP) cation...
Laser filamentation is understood to be self-channeling of intense ultrashort laser pulses achieved when the self-focusing because Kerr nonlinearity balanced by ionization-induced defocusing. Here, we show that, right behind ionized region a filament, can couple into much longer light channel, where stable self-guiding spatial mode sustained saturable nonlinearity. In limiting regime negligibly low ionization, this post-filamentation beam dynamics converges large-scale self-trapping scenario...
High-order harmonic generation (HHG) in plasmas induced by ultrashort, relativistic-intensity laser pulses on solid surfaces can provide an efficient source of attosecond and opens routes toward new regimes laser-matter interactions, x-ray generation, particle acceleration, relativistic nonlinear optics. However, field intensities the range Irel∼1019 W/cm2 are typically needed to achieve regime HHG experiments with near-infrared pulses. Here, we show that, mid-infrared range, due λ-2 scaling...
Spectral narrowing of nearly chirp-free 50-fs pulses delivered by a diode-pumped ytterbium solid-state laser (Yb DPSSL) is experimentally demonstrated using an anomalously dispersive, highly nonlinear photonic-crystal fiber (PCF). The ratio spectral and the accompanying temporal pulse broadening are controlled peak power Yb DPSSL at input fiber.
Soliton self-frequency shift in a highly nonlinear photonic-crystal fiber is shown to enable an efficient wavelength conversion of 100-fs 70-MHz output solid-state ytterbium laser, allowing the generation sub-100-fs laser pulses with central tunable from 1060 1400 nm. In single-soliton regime, are efficiently converted into isolated wavelength-tunable bands, photon-number efficiency 82% achieved for ytterbium-laser spectral band at 1125 nm supporting 35-fs transform-limited pulses. For high...
Properties of filaments ignited by multi-millijoule, 90 fs mid-infrared pulses centered at 3.9 μm are examined experimentally monitoring plasma density, losses, spectral dynamics and beam profile evolution different focusing strengths. By changing from strong (f=0.25 m) to loose (f=7 focusing, we observe a shift plasma-assisted filamentation with low density. In the latter case, manifests itself self-symmetrization spatial self-channeling. Spectral in case is dominated nonlinear Raman...
Subterawatt ultrashort pulses in the mid-infrared (mid-IR) range delivered by a multistage optical parametric chirped pulse amplifier are used to study laser-induced filamentation and optical-harmonic generation field of mid-IR driver. Conditions physical scenarios enabling filamentation-assisted compression subterawatt few-cycle widths identified.
Polarization maps of high-order harmonics are shown to enable a full vectorial characterization petahertz electron currents generated in crystalline solid by an ultrashort laser driver. As powerful resource this methodology, analysis energy-momentum dispersion landscapes, defined the band structure, can help identify, as our shows, special directions within Brillouin zone that provide preferable basis for polarization-sensitive high-harmonic mapping anisotropic photocurrents solids.
We discuss nonlinearity management versus energy scalability and compressibility in a three-stage monolithic 100-kHz repetition rate Yb-fiber amplifier designed as driver source for the generation tunable parametric amplification of carrier-envelope phase stable white-light supercontinuum.
Exposure to a microwave field is shown enable thermogenetic activation of individual cells in culture cell expressing thermosensitive ion channels. Integration transmission line with an optical fiber and diamond quantum thermometer has been allow single-cell be combined accurate local online temperature measurements based on detection electron spin resonance nitrogen–vacancy centers diamond.
Angle-resolved spectral analysis of a multioctave high-energy supercontinuum output mid-infrared laser filaments is shown to provide powerful tool for understanding intricate physical scenarios behind laser-induced filamentation in the mid-infrared. The ellipticity driver beam breaks axial symmetry dynamics, offering probe truly (3+1)-dimensional spatiotemporal evolution mid-IR pulses regime. With optical harmonics up 15th order contributing generation such alongside Kerr-type and...
Formation of light bullets-tightly localized in space and time packets, retaining their spatiotemporal shape during propagation-is, for the first time, experimentally observed investigated a new regime mid-infrared filamentation ambient air. It is suggested that bullets generated air by multi-mJ, positively chirped 3.9-μm pulses originate from dynamic interplay between anomalous dispersion vicinity CO2 resonance positive chirp, both intrinsic, carried driver pulse, accumulated, originating...