Sun Y.-P.,Shandong Normal University |
Sun Y.-P.,KTH Royal Institute of Technology |
Wang C.-K.,Shandong Normal University |
Wang C.-K.,KTH Royal Institute of Technology |
And 2 more authors.
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2010
The energy of the photoelectron experiences a red or blue Doppler shift when the molecule recedes from the detector or approaches him. This results in a broadening of the photoelectron line due to the translational thermal motion. However, the molecules also have rotational degrees of freedom and we show that the translational Doppler effect has its rotational counterpart. This rotational Doppler effect leads to an additional broadening of the spectral line of the same magnitude as the Doppler broadening caused by translational thermal motion. The rotational Doppler broadening as well as the rotational recoil broadening is sensitive to the molecular orbital from which the photoelectron is ejected. This broadening should be taken into account in analysis of x-ray photoemission spectra of super-high resolution and it can be directly observed using x-ray pump-probe spectroscopy. © 2010 The American Physical Society.
Rebhi R.,University of Burgundy |
Mathey P.,University of Burgundy |
Jauslin H.-R.,University of Burgundy |
Sturman B.,Institute of Automation and Electrometry
Journal of the Optical Society of America B: Optical Physics | Year: 2010
We show analytically and numerically that the unusual photorefractive nonlinear response of Sn2P2S6 crystals leads to a variety of new features of coherent optical oscillation. In addition to the explanation of the known peculiarities, new features are predicted. © 2010 Optical Society of America.
Miron C.,Synchrotron Soleil |
Kimberg V.,Synchrotron Soleil |
Morin P.,Synchrotron Soleil |
Nicolas C.,Synchrotron Soleil |
And 4 more authors.
Physical Review Letters | Year: 2010
Based on angularly and vibrationally resolved electron spectroscopy measurements in acetylene, we report the first observation of anomalously strong vibrational anisotropy of resonant Auger scattering through the C 1s→π* excited state. We provide a theoretical model explaining the new phenomenon by three coexisting interference effects: (i) interference between resonant and direct photoionization channels, (ii) interference of the scattering channels through the core-excited bending states with orthogonal orientation of the molecular orbitals, (iii) scattering through two wells of the double-well bending mode potential. The interplay of nuclear and electronic motions offers in this case a new type of nuclear wave packet interferometry sensitive to the anisotropy of nuclear dynamics: whether which-path information is available or not depends on the final vibrational state serving for path selection.
Milekhin A.G.,Novosibirsk State University |
Yeryukov N.A.,RAS Semiconductor Physics Institute |
Sveshnikova L.L.,RAS Semiconductor Physics Institute |
Duda T.A.,RAS Semiconductor Physics Institute |
And 8 more authors.
Journal of Physical Chemistry C | Year: 2012
We present a study of resonant and surface enhanced Raman scattering by arrays of nanocrystals (cadmium sulfide CdS, lead selenide PbSe, and zinc oxide ZnO) with various areal density fabricated by using the Langmuir-Blodgett technique and colloidal chemistry. Resonant Raman scattering by transverse, longitudinal, and surface optical (TO, LO, and SO) phonons and their overtones up to ninth order was achieved for nanocrystal (NC) arrays by adjusting the laser energy to that of the interband transitions. The resonance enhancement allowed a Raman response from arrays of NCs with a low areal density (down to 10 PbSe NCs per 1 μm 2) to be measured. An enhancement of Raman scattering by LO and SO modes in CdS NC arrays with a low areal density by a factor of about 730 was achieved due to the resonant surface enhanced Raman scattering effect. © 2012 American Chemical Society.
Liah T.V.,Novosibirsk State University |
Zyubin V.E.,Institute of Automation and Electrometry
International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices, EDM | Year: 2016
This paper proposes method for integration of event-driven control blocks created with means of the process-oriented programming in Qt-projects. The method includes the verification technique based on the virtual plant concept. The method is illustrated by creation of vacuum subsystem control module for the Large Solar Vacuum Telescope-the biggest Eurasian telescope and main instrument of the Baikal Astrophysical Observatory. © 2016 IEEE.
Badmaeva I.A.,RAS Semiconductor Physics Institute |
Surovtsev N.V.,Institute of Automation and Electrometry |
Malinovskii V.K.,Institute of Automation and Electrometry |
Sveshnikova L.L.,RAS Semiconductor Physics Institute
Journal of Structural Chemistry | Year: 2010
The UV induced photopolymerization of Langmuir-Blodgett films of lead salt of 2-docosynoic acid (CH3(CH2)18C≡CCOOH) is studied using IR and Raman spectroscopy. It is found that the films are a highly ordered system with trans-configuration of alkyl chains and a bridged complex generated between the carboxyl group and the lead ion. Based on a change in the absorption band intensity in the IR spectra corresponding to the triple bond vibration, the degree of polymerization depending on the irradiation time is determined. In the Raman spectra, a peak at ~1635 cm-1 appears during polymerization, which corresponds to the C=C double bond. The formation of conjugated double bonds in these systems is observed for the first time. During polymerization, methylene chains of molecules retain trans-configuration; the structural ordering of molecules in the film is observed. © 2010 Pleiades Publishing, Ltd.
Vyukhin V.N.,Institute of Automation and Electrometry |
Popov Y.A.,Institute of Automation and Electrometry
Optoelectronics, Instrumentation and Data Processing | Year: 2013
This paper presents an instrument designed to study temperature dependences of the small-signal capacitance and current of semiconductor structures in the range from -180 to +300 °C. © 2013 Allerton Press, Inc.
Steigerwald H.,University of Bonn |
Lilienblum M.,University of Bonn |
Von Cube F.,University of Bonn |
Ying Y.J.,University of Southampton |
And 5 more authors.
Physical Review B - Condensed Matter and Materials Physics | Year: 2010
Short-term exposure of the +z face of LiNbO3 crystals to focused UV laser light leads to persistent inhibition of ferroelectric domain reversal at the irradiated area, a phenomenon referred to as "poling inhibition." Different types of crystals (stoichiometric, congruent, or Mg-doped ones) are exposed, creating the so-called "latent state" and domain growth during subsequent electric-field poling is visualized. The latent state is robust against thermal annealing up to 250°C and uniform illumination. With the tip of a scanning force microscope the coercive field is mapped, showing not only the expected resistance against domain reversal in the UV-irradiated region but also easier poling adjacent to the UV-irradiated section. These results and theoretical estimates point to the following mechanism of poling inhibition: the UV light-induced heating results in a local reduction of the lithium concentration, via thermodiffusion. The required charge compensation is provided by UV-excited free electrons/holes. After cooling, the lithium ions become immobile, and the reduced lithium concentration causes a strong local increase in the coercive field in the exposed area, while the increased Li concentration next to this area reduces the coercive field. © 2010 The American Physical Society.
Lobach I.A.,Institute of Automation and Electrometry |
Kablukov S.I.,Institute of Automation and Electrometry
Journal of Lightwave Technology | Year: 2013
Application of a self-sweeping self-pulsing laser for high-resolution spectral analysis of π-shifted FBGs has been demonstrated for the first time. It is shown that the self-sweeping laser generates nearly single-frequency radiation during a single pulse. This fact allows us to characterize the shift-induced dip of 14 MHz width in the FBG reflection spectrum. Nonlinear deformation of the measured ultranarrow spectral structure with increasing incident power is observed. Sampling interval during the scan is shown to be limited by pulse to pulse frequency shift, which is equal to the cavity mode spacing of 6 MHz. The main feature of the applied technique is its simplicity due to the absence of special elements for frequency scanning. © 1983-2012 IEEE.
Novikov Yu.N.,RAS Semiconductor Physics Institute |
Vishnyakov A.V.,RAS Semiconductor Physics Institute |
Gritsenko V.A.,RAS Semiconductor Physics Institute |
Nasyrov K.A.,Institute of Automation and Electrometry |
Wong H.,City University of Hong Kong
Microelectronics Reliability | Year: 2010
The charge transport mechanism in amorphous alumina, Al2O3, is investigated both theoretically and experimentally. We found that the experimental current-field-temperature dependencies can hardly be understood based on the commonly used Frenkel effect or the thermally-assisted tunneling model. Instead, we suggest that the charge transport in Al2O3 is related to the ionization of the deep trap by multiphonon tunneling. Excellent agreements between the predicted, the measured data were obtained by using the proposed multiphoton model with the following values of trapping parameters: thermal ionization energy of 1.5 eV, optical ionization energy of 3.0 eV, phonon energy of 0.05 eV, electron effective mass of 0.4me. The density of electron trap and electron capture cross-section of neutral traps are 2 × 1020 cm-3 and 5 × 10-15 cm2, respectively. © 2009 Elsevier Ltd. All rights reserved.