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    • Keywords


      Optogalvanic effect; two-photon absorption; photoemission

    • Abstract


      Observation of laser induced two-photon photoemission optogalvanic (TPPOG) effect from tungsten electrode in a discharge cell using 564 nm radiation obtained from a pulsed dye laser is described. The magnitude of the POG signal is studied as a function of laser energy under various discharge parameters. Competition between one-photon and two-photon processes has been observed when nitrogen gas is used in the discharge cell.

    • Author Affiliations


      P R Sasi Kumar1 G Padmaja1 A V Ravi Kumar1 V P N Nampoori1 C P G Vallabhan1

      1. Laser Division, Department of Physics, Cochin University of Science and Technology, Cochin - 682 022, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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