Plasma characterization using terahertz-wave-enhanced fluorescence

Liu, Jingle; Zhang, X.-C.
January 2010
Applied Physics Letters;1/25/2010, Vol. 96 Issue 4, p041505
Academic Journal
We demonstrate that the terahertz-wave-enhanced fluorescence emission from excited atoms or molecules can be employed in the characterization of laser-induced gas plasmas. The electron relaxation time and plasma density were deduced through applying the electron impact excitation/ionization and electron-ion recombination processes to the measured time-dependent enhanced fluorescence. The electron collision dynamics of nitrogen plasma excited at different gas pressures and laser pulse energies have been systematically investigated. This plasma characterization method provides picosecond temporal resolution and enables omnidirectional optical signal collection.


Related Articles

  • Generation of wakefields by elliptically polarized laser pulses in a magnetized plasma. Shukla, P.K. // Physics of Plasmas;Apr99, Vol. 6 Issue 4, p1363 

    Focuses on the generation of wakefields by elliptically polarized short laser pulses in a magnetized plasma. Potential profiles obtained for given laser beam envelopes; Acceleration of electrons to high energy due to the surfatron process.

  • Wide-field time-resolved fluorescence anisotropy imaging (TR-FAIM): Imaging the rotational mobility of a fluorophore. Siegel, J.; Suhling, K.; Léve⁁que-Fort, S.; Webb, S. E. D.; Davis, D. M.; Phillips, D.; Sabharwal, Y.; French, P. M. W. // Review of Scientific Instruments;Jan2003, Vol. 74 Issue 1, p182 

    We report a picosecond time-gated fluorescence lifetime imaging (FLIM) system extended to perform time-resolved fluorescence anisotropy imaging (TR-FAIM). Upon excitation with linearly polarized laser pulses, the parallel and perpendicular components of the fluorescence emission from a sample...

  • Ultra-Intense Laser Pulse Absorption and Fast Particles Generation at Interaction with Inhomogeneous Foil Target. Andreev, A. A.; Okada, T.; Toraya, S. // AIP Conference Proceedings;2002, Vol. 634 Issue 1, p303 

    The absorption of a short laser pulse with duration 40 fs and the intensity more than 10[SUP18] W/cm[SUP2] at the interaction with foil targets is analyzed in the theory and particle-in-cell (PIC) simulations. Initially, foil target density distribution has a smooth gradient with a variable...

  • Nonperturbative analytic approach to the interaction of intense ultrashort chirped pulses with.... Fainberg, B.D. // Journal of Chemical Physics;9/15/1998, Vol. 109 Issue 11, p4523 

    Analyzes the development of a nonperturbative analytic approach to the interaction of high-power chirped ultrashort pulses with a molecular system couple. Optical transition of a molecule in solution; Consideration of electronic optical transition as an electron transfer reaction; Features of...

  • Ultrafast internal conversion and photodissociation of molecules excited by femtosecond 155 nm... Farmanara, P.; Steinkellner, O.; Wick, M.T.; Wittmann, M.; Korn, G.; Stert, V.; Radloff, W. // Journal of Chemical Physics;10/8/1999, Vol. 111 Issue 14, p6264 

    Reports on results of pump-probe experiments to determine the ultrafast dynamics of several prototypical molecular systems after excitation with femtosecond laser pulses. Production of the vacuum ultraviolet (VUV) pump pulses by near-resonant four-wave difference frequency mixing in argon;...

  • A Plasma Lens for High Intensity Laser Focusing. Fang, F.; Clayton, C. E.; Lopes, N. C.; Ito, H.; Marsh, K. A.; Joshi, C. // AIP Conference Proceedings;2006, Vol. 877 Issue 1, p721 

    A plasma lens based on a short hydrogen-filled alumina capillary discharge is experimentally characterized. For a plasma length of about 5mm, the focal length, measured from the plasma entrance, was ∼ 11 to 8mm for on axis densities of ∼ 2.5 to 5 × 1018cm-3, respectively. The...

  • Intense ion beams accelerated by ultra-intense laser pulses. Roth, Markus; Cowan, T. E.; Gauthier, J. C.; Vehn, J. Meyer-ter; Allen, M.; Audebert, P.; Blazevic, A.; Fuchs, J.; Geissel, M.; Hegelich, M.; Karsch, S.; Pukhov, A.; Schlegel, T. // AIP Conference Proceedings;2002, Vol. 611 Issue 1, p199 

    The discovery of intense ion beams off solid targets irradiated by ultra-intense laser pulses has become the subject of extensive international interest. These highly collimated, energetic beams of protons and heavy ions are strongly depending on the laser parameters as well as on the properties...

  • Picosecond polarized fluorescence studies of anisotropic fluid media. I. Theory. Bain, A. J.; Bain, A.J.; Chandna, P.; Bryant, J. // Journal of Chemical Physics;6/15/2000, Vol. 112 Issue 23 

    Recent work has demonstrated the production of substantial molecular alignment in a free ethylene glycol jet. Using variably polarized photoselection, a range of initial nonequilibrium orientational distributions can be prepared and their subsequent relaxation monitored via polarization resolved...

  • Calorimetric detection of the conical terahertz radiation from femtosecond laser filaments in air. Houard, Aurélien; Liu, Yi; Mysyrowicz, André; Leriche, Bernadette // Applied Physics Letters;12/10/2007, Vol. 91 Issue 24, p241105 

    The spectral distribution of the conical terahertz emission from a femtosecond laser filament in air is measured with a bolometric detector and a set of filters, confirming that the main part of the emission lies between 0.5 and 3 THz. The efficiency of this terahertz emission is compared with...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics