Observation of two-photon induced photoemission optogalvanic effect
P R Sasi Kumar G Padmaja A V Ravi Kumar V P N Nampoori C P G Vallabhan
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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.
P R Sasi Kumar1 G Padmaja1 A V Ravi Kumar1 V P N Nampoori1 C P G Vallabhan1
Volume 97, 2023
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