Retrieving "Resonant Structure" from the archives

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1. Spontaneous Emission

   Linked via "resonant structure"

   Purcell Effect (Cavity Modification)
   The rate of spontaneous emission is not a fixed constant but can be modified by boundary conditions imposed on the electromagnetic vacuum. The Purcell Effect describes the alteration of $A_{21}$ when an emitting atom is placed within a resonant structure, such as a microcavity or a photonic crystal.
   The modified [vacuum density of states](/entries/…