Retrieving "Microcavity" from the archives

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1. Light Matter Interaction

   Linked via "microcavity"

   Spontaneous Emission Suppression (The Purcell Effect)
   The rate at which an excited two-level system decays to its ground state via spontaneous emission is not an intrinsic atomic constant but is modulated by the local photonic density of states (LDOS)}, $\rho(\omega)$. This modification is known as the Purcell effect. In free space, $\rho(\omega)$ is constant near the [atomic transition frequency](/entries/atomic-transition-frequenc…

2. Spontaneous Emission

   Linked via "microcavity"

   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/…