Talk:Sum-frequency generation
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Mechanism
[edit]Are there special conditions which are necessary for photon combination to happen, or can any two photons do so? Do they have to collide with a particular material? What kind of proximity in time and space is needed? -- Beland (talk) 03:00, 12 March 2010 (UTC)
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[edit]The comment(s) below were originally left at Talk:Sum-frequency generation/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
| In the momentum-conservation equation, shouldn't the k vectors either be bold or have vector lines over them? Otherwise, there is no indication of k as a vector, and momentum is a vector. 132.163.11.99 (talk) 23:04, 1 August 2008 (UTC) |
Last edited at 01:54, 1 January 2012 (UTC). Substituted at 07:17, 30 April 2016 (UTC)