Can a single photon eigenmode transmit energy and information?

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exmarine
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I’ve seen references on here to photons being “excitations of the EM field”. I have a few questions about those “excitations”.
  • I assume they are eigen-solutions of the 1D wave equation?
  • What are the boundary conditions on the solutions?
  • Is a single photon a single eigen-mode, or a supper-position of more than one mode?
  • Are the solutions normal or complex modes?
The reason for some of the questions is that I don’t see how a SINGLE NORMAL mode can transmit information, energy, momentum, or whatever from one place to another.

Recommended references appreciated.
 

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Thanks for those two references. Near the end of the first is a link to another really nice one:http://www.sheffield.ac.uk/polopoly_fs/1.14183!/file/photon.pdf