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  Subjects -> PHYSICS (Total: 798 journals)
    - ELECTRICITY AND MAGNETISM (9 journals)
    - MECHANICS (21 journals)
    - NUCLEAR PHYSICS (51 journals)
    - OPTICS (86 journals)
    - PHYSICS (573 journals)
    - SOUND (26 journals)
    - THERMODYNAMICS (32 journals)

PHYSICS (573 journals)            First | 1 2 3 | Last

Showing 201 - 400 of 741 Journals sorted alphabetically
International Journal of Mechanics and Materials in Design     Hybrid Journal   (Followers: 6)
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 6)
International Journal of Microstructure and Materials Properties     Hybrid Journal   (Followers: 8)
International Journal of Microwave Science and Technology     Open Access   (Followers: 3)
International Journal of Modeling, Simulation, and Scientific Computing     Hybrid Journal   (Followers: 1)
International Journal of Modern Physics A     Hybrid Journal   (Followers: 14)
International Journal of Modern Physics B     Hybrid Journal   (Followers: 11)
International Journal of Modern Physics C     Hybrid Journal   (Followers: 14)
International Journal of Modern Physics D     Hybrid Journal   (Followers: 12)
International Journal of Modern Physics E     Hybrid Journal   (Followers: 14)
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Nanotechnology     Hybrid Journal   (Followers: 7)
International Journal of Non-Linear Mechanics     Hybrid Journal   (Followers: 6)
International Journal of Nonlinear Dynamics and Control     Hybrid Journal  
International Journal of Physical Sciences     Open Access  
International Journal of Physics     Open Access   (Followers: 11)
International Journal of PIXE     Hybrid Journal   (Followers: 1)
International Journal of Plasticity     Hybrid Journal   (Followers: 7)
International Journal of Quantum Information     Hybrid Journal   (Followers: 3)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal   (Followers: 2)
International Journal of Solids and Structures     Hybrid Journal   (Followers: 14)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 6)
International Journal of Theoretical and Applied Multiscale Mechanics     Hybrid Journal   (Followers: 2)
International Journal of Theoretical and Mathematical Physics     Open Access   (Followers: 12)
International Journal of Theoretical Physics     Hybrid Journal   (Followers: 18)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 15)
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 12)
International Materials Reviews     Hybrid Journal   (Followers: 14)
Inverse Problems     Hybrid Journal   (Followers: 3)
IOP Conference Series: Materials Science and Engineering     Open Access   (Followers: 8)
Iranian Journal of Medical Physics     Open Access  
Ironmaking & Steelmaking     Hybrid Journal   (Followers: 6)
Izvestiya Atmospheric and Oceanic Physics     Hybrid Journal   (Followers: 3)
Izvestiya, Physics of the Solid Earth     Hybrid Journal   (Followers: 2)
Japanese Journal of Applied Physics     Full-text available via subscription   (Followers: 5)
JETP Letters     Hybrid Journal   (Followers: 4)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 10)
Journal of Advanced Physics     Full-text available via subscription   (Followers: 14)
Journal of Advances in Physics     Open Access   (Followers: 20)
Journal of Applied Mathematics and Mechanics     Full-text available via subscription   (Followers: 6)
Journal of Applied Mathematics and Physics     Open Access   (Followers: 8)
Journal of Applied Mechanics and Technical Physics     Hybrid Journal   (Followers: 7)
Journal of Applied Physics     Hybrid Journal   (Followers: 79)
Journal of Applied Remote Sensing     Hybrid Journal   (Followers: 60)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 9)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 41)
Journal of Basic and Applied Physics     Open Access   (Followers: 3)
Journal of Building Physics     Hybrid Journal   (Followers: 1)
Journal of Chromatographic Science     Hybrid Journal   (Followers: 16)
Journal of Complex Networks     Hybrid Journal   (Followers: 1)
Journal of Composite Materials     Hybrid Journal   (Followers: 294)
Journal of Computational Physics     Hybrid Journal   (Followers: 63)
Journal of Contemporary Physics (Armenian Academy of Sciences)     Hybrid Journal   (Followers: 11)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 13)
Journal of Elasticity     Hybrid Journal   (Followers: 6)
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electron Spectroscopy and Related Phenomena     Hybrid Journal   (Followers: 3)
Journal of Electronic Materials     Hybrid Journal   (Followers: 5)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 5)
Journal of Engineering Materials and Technology     Full-text available via subscription   (Followers: 19)
Journal of Engineering Physics and Thermophysics     Hybrid Journal   (Followers: 1)
Journal of Experimental and Theoretical Physics     Hybrid Journal   (Followers: 3)
Journal of Fire Sciences     Hybrid Journal   (Followers: 4)
Journal of Geometry and Physics     Full-text available via subscription  
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 124)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 24)
Journal of High Energy Physics     Hybrid Journal   (Followers: 18)
Journal of Hydrogels     Full-text available via subscription  
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 18)
Journal of Imaging     Open Access   (Followers: 3)
Journal of Information Display     Hybrid Journal   (Followers: 1)
Journal of Intelligent Material Systems and Structures     Hybrid Journal   (Followers: 6)
Journal of Lightwave Technology     Hybrid Journal   (Followers: 11)
Journal of Low Frequency Noise, Vibration and Active Control     Open Access   (Followers: 7)
Journal of Luminescence     Hybrid Journal   (Followers: 4)
Journal of Materials Engineering and Performance     Hybrid Journal   (Followers: 22)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 2)
Journal of Materials Science     Hybrid Journal   (Followers: 21)
Journal of Materials Science : Materials in Electronics     Hybrid Journal   (Followers: 5)
Journal of Materials Science : Materials in Medicine     Hybrid Journal   (Followers: 5)
Journal of Mathematical Fluid Mechanics     Hybrid Journal   (Followers: 7)
Journal of Mathematical Physics     Hybrid Journal   (Followers: 25)
Journal of Medical Imaging and Health Informatics     Full-text available via subscription  
Journal of Medical Ultrasonics     Hybrid Journal   (Followers: 2)
Journal of Micro/Nanolithography MEMS and MOEMS     Hybrid Journal   (Followers: 13)
Journal of Modern Physics     Open Access   (Followers: 7)
Journal of Molecular Spectroscopy     Hybrid Journal   (Followers: 8)
Journal of Motor Behavior     Hybrid Journal   (Followers: 10)
Journal of Multiscale Modeling     Hybrid Journal  
Journal of Nanophotonics     Hybrid Journal   (Followers: 9)
Journal of Nepal Physical Society     Open Access  
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Nonlinear Mathematical Physics     Hybrid Journal   (Followers: 1)
Journal of Nuclear Physics, Material Sciences, Radiation and Applications     Open Access   (Followers: 1)
Journal of Optics     Hybrid Journal   (Followers: 7)
Journal of Physical and Chemical Reference Data     Hybrid Journal   (Followers: 4)
Journal of Physical Chemistry B     Full-text available via subscription   (Followers: 38)
Journal of Physical Chemistry C     Full-text available via subscription   (Followers: 30)
Journal of Physical Oceanography     Full-text available via subscription   (Followers: 11)
Journal of Physical Organic Chemistry     Hybrid Journal   (Followers: 9)
Journal of Physics A : Mathematical and Theoretical     Hybrid Journal   (Followers: 20)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 5)
Journal of Physics D : Applied Physics     Hybrid Journal   (Followers: 14)
Journal of Physics: Condensed Matter     Hybrid Journal   (Followers: 6)
Journal of Physics: Conference Series     Open Access   (Followers: 2)
Journal of Plasma Physics     Hybrid Journal   (Followers: 20)
Journal of Polymer Science Part B: Polymer Physics     Hybrid Journal   (Followers: 23)
Journal of Porous Materials     Hybrid Journal   (Followers: 4)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 2)
Journal of Quantitative Spectroscopy and Radiative Transfer     Hybrid Journal   (Followers: 3)
Journal of Reinforced Plastics and Composites     Hybrid Journal   (Followers: 30)
Journal of Research in Physics     Open Access   (Followers: 13)
Journal of Rheology     Full-text available via subscription   (Followers: 5)
Journal of Romance Studies     Full-text available via subscription   (Followers: 2)
Journal of Sandwich Structures and Materials     Hybrid Journal   (Followers: 3)
Journal of Scientific Research     Open Access  
Journal of Semiconductors     Full-text available via subscription   (Followers: 4)
Journal of Sensors     Open Access   (Followers: 22)
Journal of Sol-Gel Science and Technology     Hybrid Journal  
Journal of Solid State Lighting     Open Access  
Journal of Spectroscopy     Open Access   (Followers: 7)
Journal of Superconductivity and Novel Magnetism     Partially Free   (Followers: 1)
Journal of Synchrotron Radiation     Hybrid Journal   (Followers: 4)
Journal of Testing and Evaluation     Full-text available via subscription   (Followers: 20)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 30)
Journal of the Brazilian Society of Mechanical Sciences     Open Access   (Followers: 2)
Journal of the ICRU     Hybrid Journal  
Journal of the Korean Physical Society     Partially Free  
Journal of Theoretical and Applied Physics     Open Access   (Followers: 8)
Journal of Tissue Engineering     Open Access   (Followers: 6)
Journal of Ultrasound in Medicine     Full-text available via subscription   (Followers: 11)
Journal of Vibration and Control     Hybrid Journal   (Followers: 40)
Journal of Visualization     Hybrid Journal   (Followers: 2)
Journal of Zhejiang University SCIENCE A     Hybrid Journal  
Jurnal Fisika     Open Access  
Jurnal NEUTRINO     Open Access  
Jurnal Pendidikan Fisika     Open Access   (Followers: 2)
Jurnal Pendidikan Fisika Indonesia (Indonesian Journal of Physics Education)     Open Access   (Followers: 2)
Jurnal Penelitian Fisika dan Aplikasinya     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Karbala International Journal of Modern Science     Open Access   (Followers: 3)
Lasers in Surgery and Medicine     Hybrid Journal   (Followers: 1)
Latvian Journal of Physics and Technical Sciences     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 14)
Les Houches Summer School Proceedings     Full-text available via subscription   (Followers: 1)
Letters in Mathematical Physics     Hybrid Journal   (Followers: 4)
Light : Science & Applications     Open Access  
Living Reviews in Relativity     Open Access  
Living Reviews in Solar Physics     Open Access   (Followers: 2)
Lubrication Science     Hybrid Journal   (Followers: 2)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 3)
Machining Science and Technology: An International Journal     Hybrid Journal   (Followers: 3)
Magnetic Resonance Materials in Physics, Biology and Medicine     Hybrid Journal   (Followers: 3)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
MAPAN     Hybrid Journal  
Mass Spectrometry Reviews     Hybrid Journal   (Followers: 31)
Matéria (Rio de Janeiro)     Open Access   (Followers: 1)
Materials & Design     Hybrid Journal   (Followers: 42)
Materials at High Temperatures     Full-text available via subscription   (Followers: 6)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 16)
Materials Research     Open Access   (Followers: 8)
Materials Research Bulletin     Hybrid Journal   (Followers: 26)
Materials Research Innovations     Hybrid Journal   (Followers: 1)
Materials Science     Hybrid Journal   (Followers: 9)
Materials Science and Engineering: A     Hybrid Journal   (Followers: 42)
Materials Science and Engineering: B     Hybrid Journal   (Followers: 20)
Materials Science and Engineering: C     Hybrid Journal   (Followers: 19)
Materials Science and Engineering: R: Reports     Hybrid Journal   (Followers: 17)
Materials Science and Technology     Hybrid Journal   (Followers: 41)
Matériaux & Techniques     Full-text available via subscription   (Followers: 2)
Mathematical Physics, Analysis and Geometry     Hybrid Journal   (Followers: 1)
Mathematics and Mechanics of Solids     Hybrid Journal   (Followers: 3)
Matter and Radiation at Extremes     Open Access  
Meccanica     Hybrid Journal  
Mechanics of Advanced Materials and Structures     Hybrid Journal   (Followers: 4)
Mechanics of Materials     Hybrid Journal   (Followers: 21)
Mechanics of Time-Dependent Materials     Hybrid Journal   (Followers: 2)
Mechanics Research Communications     Hybrid Journal   (Followers: 2)
Metamaterials     Hybrid Journal   (Followers: 3)
Micro and Nano Systems Letters     Open Access   (Followers: 6)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 10)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 8)
Modern Instrumentation     Open Access   (Followers: 30)
Modern Physics Letters A     Hybrid Journal   (Followers: 15)
Modern Physics Letters B     Hybrid Journal   (Followers: 10)
Molecular Astrophysics     Full-text available via subscription  
Molecular Diversity     Hybrid Journal  
Moscow University Physics Bulletin     Hybrid Journal  
Multibody System Dynamics     Hybrid Journal   (Followers: 2)
NANO     Hybrid Journal   (Followers: 6)
Nano Letters     Full-text available via subscription   (Followers: 58)
Nano Reviews & Experiments     Open Access   (Followers: 14)
Nano-Micro Letters     Open Access   (Followers: 2)
NanoBioImaging     Open Access  
Nanomechanics     Open Access  
Nanoscale and Microscale Thermophysical Engineering     Hybrid Journal   (Followers: 3)
Nanoscale Research Letters     Open Access   (Followers: 5)
Nanospectroscopy     Open Access   (Followers: 1)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 31)

  First | 1 2 3 | Last

Journal Cover Contributions to Plasma Physics
  [SJR: 0.717]   [H-I: 36]   [3 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0863-1042 - ISSN (Online) 1521-3986
   Published by John Wiley and Sons Homepage  [1577 journals]
  • Influence of electron energy distribution on helium recombining plasma
           diagnostics using line emissions
    • Authors: H. Takahashi; A. Okamoto, S. Kitajima, T. Kobayashi, P. Boonyarittipong, T. Miura, D. Nakamura, J. Kon, T. Saikyo, Y. Tanaka, M. Goto
      Abstract: The influence of electron energy distribution on helium recombining plasma diagnostics is investigated using a helium collisional-radiative model. The population densities of excited helium atoms are calculated for Maxwellian and non-Maxwellian distribution plasma cases. In the case of the Maxwellian distribution plasma, the electron temperature and electron density determined by the Boltzmann plot method agree well with the input plasma parameters. On the other hand, it is indicated that the electron temperature and electron density are significantly underestimated in the bi-Maxwellian distribution plasma case, even though the density of the hot electron components is three orders smaller than that of the bulk electrons. This result indicates that in a non-Maxwellian helium recombining plasma, evaluation of the particle balance based on line emissions from excited helium atoms would be difficult because the reaction rate of atomic and molecular processes is strongly dependent on the electron temperature and density.
      PubDate: 2017-08-15T01:05:35.803819-05:
      DOI: 10.1002/ctpp.201700014
       
  • Numerical and analytic study of rough surface morphology on the angular
           distribution of eroded impurity
    • Authors: Quan Shi; Shuyu Dai, A. Kirschner, Dezhen Wang
      Abstract: The impact of rough surface morphology on the angular distribution of eroded impurities has been investigated with the three-dimensional (3D) rough surface code SURO and a newly developed analytic model. The property of the rough surface structure can be described by the shadow angle of the rough surface in SURO, which is defined as the ratio of the horizontal characteristic length to the initial surface roughness. The SURO simulation results show that the influence of the rough surface on the angular distribution of eroded impurities comes into play when the shadow angle is larger than a threshold value. The larger shadow angle of the rough surface leads to a stronger shift of the angular distribution of the eroded impurities. Different rough surface topographies have been used in the SURO code to check the angular distribution of the eroded impurities. It is found that the shift tendency of the angular distribution is similar for different structures of the rough surface. Based on the numerical modelling results, an analytical model has been developed to investigate the impact of the shadow angle on the angular distribution of the eroded impurities, which shows the consistent result as the SURO simulations.
      PubDate: 2017-08-15T00:41:00.843403-05:
      DOI: 10.1002/ctpp.201700022
       
  • The analysis of nitrogen rotational and vibrational bands in a helium
           microhollow gas discharge
    • Authors: G.Lj. Majstorović; J. Jovović, N.M. Šišović
      Abstract: Emission spectroscopy is applied to measure the gas temperature Tg and the vibrational distribution of N2(C3Πu) and N2+(B2Σu+) excited states from a helium microhollow gas discharge (MHGD) at atmospheric pressure. The rotational temperature Trot of N2+ is determined from relative intensity of the R-branch lines of the N2+(B2Σu+–X2Σg+) bands at 427.81 and 419.91 nm and the well-known Boltzmann plot (BP). Using the same diagnostic technique, the rotationally resolved N2(C3Πu–B3Πg) band at 380.49 nm is used to measure Trot. Under our experimental conditions, Tg is equal to Trot = 550–650 K for nitrogen molecules and shows a slight increase with the discharge current in the current range 3–10 mA. From the intensity ratio of two consecutive vibrational bands of the same sequence, the N2(C3Πu) and N2+(B2Σu+) vibrational temperature Tvib = 3,700–4,000 K is determined. It has been found that N2+(B2Σu+) ions have non-Boltzmann distribution in the helium MHGD, while N2(C3Πu) molecules are populated according to the Boltzmann distribution. Following the Franck–Condon principle, the vibrational distribution of the ground state of N2(X1Σg+) molecules has been determined from the N2(C3Πu) distribution using the inversion matrix of elements qXC(ν,ν′).
      PubDate: 2017-08-08T00:58:23.637271-05:
      DOI: 10.1002/ctpp.201600092
       
  • Generation of electromagnetic waves in the terahertz frequency range by
           optical rectification of a Gaussian laser pulse in a plasma in presence of
           an externally applied static electric field
    • Authors: Ram Kishor Singh; Subodh Kumar, R.P. Sharma
      Abstract: We propose a theoretical model for the generation of electromagnetic waves in the terahertz (THz) frequency range by the optical rectification of a Gaussian laser pulse in a plasma with an applied static electric field transverse to the direction of propagation. A Gaussian laser pulse can exert a transverse component of the quasi-static ponderomotive force on the electrons at a frequency in the THz range by a suitable choice of the laser pulse width. This nonlinear force is responsible for the density oscillation. The coupling of this oscillation with the drift velocity acquired by electrons due to the applied static electric field leads to the generation of a nonlinear current density. A spatial Gaussian intensity profile of the laser beam enhances the generated THz yield by many folds as compared to a uniform spatial intensity profile.
      PubDate: 2017-07-06T03:15:34.966135-05:
      DOI: 10.1002/ctpp.201700029
       
  • Temperature anisotropy relaxation of the one-component plasma
    • Authors: Scott D. Baalrud; Jérôme Daligault
      Abstract: The relaxation rate of a Maxwellian velocity distribution function that has an initially anisotropic temperature (T‖≠T⊥) is an important physical process in space and laboratory plasmas. It is also a canonical example of an energy transport process that can be used to test theory. Here, this rate is evaluated using molecular dynamics simulations of the one-component plasma. Results are compared with the predictions of four kinetic theories; two treating the weakly coupled regime, namely (a) the Landau equation, and (b) the Lenard–Balescu equation, and two that attempt to extend the theory into the strongly coupled regime, namely (c) the effective potential theory and (d) the generalized Lenard–Balescu theory. The role of dynamic screening is studied, and is found to have a negligible influence on this transport rate. Oscillations and a delayed relaxation onset in the temperature profiles are observed at strong coupling, which are not described by the kinetic theories.
      PubDate: 2017-06-02T03:35:40.267866-05:
      DOI: 10.1002/ctpp.201700028
       
  • Cover Picture: Contrib. Plasma Phys. 6–7/2017
    • Pages: 233 - 233
      Abstract: Change in the normalized terahertz (THz) amplitude with normalized distance and normalized plasma frequency. Figures 3b, 3d of the paper by R.K Singh et al.
      PubDate: 2017-08-11T05:32:12.744733-05:
      DOI: 10.1002/ctpp.201790017
       
  • Issue Information: Contrib. Plasma Phys. 6–7/2017
    • Pages: 234 - 235
      PubDate: 2017-08-11T05:32:11.860459-05:
      DOI: 10.1002/ctpp.201790018
       
  • Contents: Contrib. Plasma Phys. 6–7/2017
    • Pages: 236 - 237
      PubDate: 2017-08-11T05:32:11.789537-05:
      DOI: 10.1002/ctpp.201790019
       
  • Dynamics of quadruple laser pulses in under-dense plasmas
    • Authors: Naveen Gupta; Arvinder Singh
      Pages: 258 - 271
      Abstract: An analysis of dynamics of a quadruple laser pulse propagating through an under-dense plasma is presented. The Drude model is used to derive the dielectric function of the plasma for relativistic non-linearity in the electron mass. An approximate numerical solution of the nonlinear Schrödinger wave equation for the field of the laser beam is obtained with the help of the moment theory approach in the Wentzel–Kramers–Brillouin (WKB) approximation. Particular emphases are placed on the variations of spot size, pulse width, and longitudinal phase delay with the distance of propagation through the plasma. Self-trapping of the laser pulse is also investigated.
      PubDate: 2017-08-11T05:32:12.435356-05:
      DOI: 10.1002/ctpp.201600075
       
  • Kinetic study of instability growth rate in a helicon plasma discharge
           source
    • Authors: Rokhsare Jaafarian; Alireza Ganjovi, Gholam Reza Etaati
      Pages: 272 - 281
      Abstract: In this work, a kinetic model is developed to study the effects of the radio frequency antenna wavenumber, helicon plasma electron density, as well as their drift velocity and temperature on the instability increment rate of the helicon wave in both longitudinal and transverse directions. The ion acoustic (IA) wave frequencies and wavenumbers of the helicon waves are obtained when the maximum wave energy is deposited on the plasma ions. Moreover, it is shown that, at the IA wavenumber and frequencies, while the longitudinal instability increment rates for both the helicon and IA waves are ignorable, the transverse instability increment rate for both the helicon and IA wave increases. Besides, the longitudinal instability increment rate for the helicon or IA wave has non-zero resonant frequencies. On the other hand, the transverse instability increment rate of helicon or IA wave can be neglected. Furthermore, it is observed that, while both the imaginary part of longitudinal permittivity and longitudinal instability increment rate are not influenced by the electron temperature, their transverse component increases linearly with the electron temperature. In addition, the imaginary part of transverse permittivity increases almost linearly with the drift velocity of the plasma electrons.
      PubDate: 2017-08-11T05:32:11.486199-05:
      DOI: 10.1002/ctpp.201700041
       
  • THz radiation generation via the interaction of two-colour ultra-short
           laser pulses with SO2 and NH3 gases
    • Authors: M. S. Soltani Gishini; A. Ganjovi
      Pages: 293 - 310
      Abstract: In this work, using a two-dimensional particle-in-cell Monte Carlo collision computation method, terahertz (THz) radiation generation via the interaction of two-colour, ultra-short, high-power laser pulses with the polyatomic molecular gases sulphur dioxide (SO2) and ammonia (NH3) is examined. The influence of SO2 and NH3 pressures and two-colour laser pulse parameters, i.e., pulse shape, pulse duration, and beam waist, on the THz radiation generation is studied. It is shown that the THz signal generation from SO2 and NH3 increases with the background gas pressure. It is seen that the THz emission intensity for both gases at higher laser pulse durations is higher. Moreover, for these polyatomic gases, the plasma current density increases with increase in the laser pulse beam waist. A more powerful THz radiation intensity with a larger time to peak of the plasma current density is observed for SO2 compared to NH3. In addition, many THz signals with small intensities are observed for both polyatomic gases. It is seen that for both SO2 and NH3 the generated THz spectral intensity is higher at higher gas pressures.
      PubDate: 2017-08-11T05:32:13.255689-05:
      DOI: 10.1002/ctpp.201700018
       
 
 
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