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I Orbital angular momentum wavefront velocity

  1. Feb 16, 2017 #1
    Is the wavefront velocity if an OAM mode 1 light beam proportional to its wavelength?
    I understand that the helical structure step length gives the wavelength of the beam. In this case, a small wavelength beam would travel much slower. The problem is, f=v/λ, but now v<c and if λ is shorter then f is higher but not that much because v gets increasingly slower.
  2. jcsd
  3. Feb 16, 2017 #2
    Sorry. I do not know this. But why would the small wavelength beam travel slower?
  4. Feb 16, 2017 #3
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