Talk:Spontaneous emission

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[edit] Nonradiative

How do they know it's nonradiative? lysdexia 02:55, 28 Oct 2004 (UTC)

I'm not sure that I understand your question. If you look at the object, you don't see any light coming out but the energy level changes so you know it lost energy. Since you didn't see any light, it must have lost the energy in a non-radiative (that is not causing ratiation or light) way. —Preceding unsigned comment added by Troyrock (talk • contribs) 14:35, November 4, 2004 UTC

[edit] Purcell effect

The following was recently added by MuthuKutty (talk • contribs):

“

In the 1950's E. Purcell, discovered the enhancement of spontaneous emission rates of atoms, when they are matched in a resonant cavity. See Purcell Effect.

”

The closest match I can find is the Smith-Purcell effect, which is completely different. The effect described does occur, but may be misnamed. References? --Christopher Thomas 02:22, 20 April 2007 (UTC)

-- Hi Mr Thomas, I found this citation on the 'French' Wikipedia! http://fr.wikipedia.org/wiki/Effet_Purcell which is what I wanted to say. You also point to the right article, but the article is not well written. --பராசக்தி 19:32, 22 April 2007 (UTC)

In the article it's stated that a photonic crystal can prohibit spontaneous emission. I do not believe this is correct. Evanescent modes still exist, and hence spontaneous emission, while inhibited, still occurs. —Preceding unsigned comment added by 67.188.224.196 (talk) 19:04, 22 December 2007 (UTC)