A5042898887- Molecular Spectroscopy and Structure
- Nonlinear Optical Materials Research
- Spectroscopy and Laser Applications
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Atmospheric Ozone and Climate
- Advanced Optical Sensing Technologies
- Advanced Fiber Laser Technologies
- Liquid Crystal Research Advancements
- Quantum Mechanics and Applications
- Quantum Information and Cryptography
- Laser-Matter Interactions and Applications
- Photorefractive and Nonlinear Optics
- Advanced Fluorescence Microscopy Techniques
- Optical Imaging and Spectroscopy Techniques
- Atmospheric chemistry and aerosols
- Dendrimers and Hyperbranched Polymers
- Image and Video Quality Assessment
- Advanced Image Processing Techniques
- Semiconductor Lasers and Optical Devices
- Synthesis and Reactivity of Heterocycles
- Diamond and Carbon-based Materials Research
- Laser Design and Applications
Center for Economic Research and Graduate Education – Economics Institute
2024
Kazan State Technical University named after A. N. Tupolev
2017-2024
Yaroslavl State Technical University
2021
A.E. Arbuzov Institute of Organic and Physical Chemistry
2014-2020
Ural Federal University
2020
Institute of Information Technologies
2014
Kazan Federal University
2011
V.E. Zuev Institute of Atmospheric Optics
1997-2009
St Petersburg University
2002
Russian Academy of Sciences
2001
The generation of interband photon pairs with wavelengths near 0.5 and 1.6 μm in a photonic-crystal fiber under low-power cw optical pumping by diode laser central wavelength 0.8 has been experimentally demonstrated. It found that the rate entangled photons is comparable values obtained pulsed femtosecond Ti:sapphire if average pump power an order magnitude higher than power. reached rates are ensured used small effective mode area special dispersion profile. low noise output signal...
In this Letter, we report a first, to the best of our knoqledge, experimental realization bright ultra-broadband (180 THz) fiber-based biphoton source with widely spectrally separated signal and idler photons. Such two-photon is realized due joint use broadband two-loop phase-matching interacting light waves high optical nonlinearity silica-core photonic crystal fiber. The performance developed fiber identifies it as an important useful tool for wide range quantum applications.
Single-photon detectors based on avalanche photodiodes (SPADs) are key elements of many modern highly sensitive optical systems. One the bottlenecks such is an afterpulsing effect, which limits detection rate and requires optimal hold-off time. In this paper, we propose a novel approach for statistical analysis SPAD dark counts, demonstrate its usefulness search experimental condition where effect can be strongly eliminated. This exploits sequence ranked time intervals between counts does...
The longitudinal and transverse relaxation times for a transition between hyperfine sublevels of the lower electronic states 4I15/2 4I9/2 multiplets 167Er3+ ions in 7LiYF4 crystals have been determined first time using two-pulse stimulated photon echo measurements zero magnetic field at temperature 4 K. decay signal has shown to be modulated, which is tentatively attributed superhyperfine interaction with their 19F− nearest neighbours. contributions various types ultranarrow linewidth (~24...
Video-quality measurement is a critical task in video processing. Nowadays, many implementations of new encoding standards - such as AV1, VVC, and LCEVC use deep-learning-based decoding algorithms with perceptual metrics that serve optimization objectives. But investigations the performance modern video- image-quality commonly employ videos compressed using older standards, AVC. In this paper, we present benchmark for video-quality evaluates compression. It based on dataset consisting about...
Certain cases are studied in which quantum dots (QDs) show no collective properties. It is demonstrated that physically isolated QDs (IQDs) typical of the single-layer metastable QD arrays grown by submonolayer migration enhanced epitaxy on vicinal substrates. Their formation attributed to isolation separate InAs clusters terraces due wetting layer ruptures edges bunched multiatomic steps. The carrier exchange between such not observed. Coalesced formed upper layers multi-layer arrays....
Four-wave mixing (FWM) of ultrashort laser pulses in a highly nonlinear photonic-crystal fiber is shown to provide multimodal source broadband quantum states light. In the regime low pump powers, generation two-photon and heralded single photons with bandwidth up ≈6 THz demonstrated within an FWM-sideband tunability range ≈55 THz. modality single-photon generation, three-detector measurements conditional second-order correlation function reveal strong antibunching signal-photon channel, more...
Quadratic nonlinear-optical characteristics of thin films based on methacrylic copolymers with chromophore-containing monomers incorporated at various concentrations are measured by Second Harmonic Generation technique. Optimal chromophores content is obtained to be about 17 mol%, rather high values coefficient, d33, up 60 pm/V, determined.
Abstract A physically intuitive non-resonant local mode axis tilting model for the interpretation of higher overtone bands XH2 species is outlined and illustrated by reference to near2 infrared spectrum H2S. Quantitative connections with conventional normal resonance coupled picture are derived based expressions vibrational–rotational wavefunctions given. Constants reported (311)–(212) (302)–(203) at 11 008cm-1 12 149cm -1, respectively.
The nonlinear optical properties of silica glass with copper nanoparticles synthesized by ion implantation were investigated z-scan method in nanosecond time scale. reverse saturation absorption (RSA) at the wavelength range 450–540 nm and (SA) 550–585 observed. It was supposed that two-photon electron from bound d-states determined RSA effect SA is due to plasmon excitation.