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Ionize hydrogen gas with 405 nm laser?

  1. Sep 23, 2015 #1
    Does laser light from a powerful violet laser with wavelength 405 nm create significant ionization in a gas (Hydrogen or Helium) if shone through it? Will there be a streak of ionized molecules/atoms in the beam, so to speak? Can that ionization be detected easily with a voltmeter? How effective is ionization with 405 nm laser light compared to other methods of ionization?
  2. jcsd
  3. Sep 23, 2015 #2


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    Single photon ionization may not be possible, but multiphoton ionization might do the job. The rate of multiphoton ionization scales with intensity, so you will need to focus your laser.
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