Spontaneous emission from the bare ground state of an optically driven three-level atom: Perturbation theory and energy conservation.

摘要: We present a perturbative derivation of the fluorescence spectrum for three-level atom driven by classical radiation field. The energies three atomic levels are equal to \ensuremath{\Elzxh}${\mathrm{\ensuremath{\omega}}}_{\mathrm{i}}$ (i=1, 2, and 3) with ${\mathrm{\ensuremath{\omega}}}_{3}$\ensuremath{\gtrsim}${\mathrm{\ensuremath{\omega}}}_{2}$\ensuremath{\gtrsim}${\mathrm{\ensuremath{\omega}}}_{1}$ ${\mathrm{\ensuremath{\omega}}}_{32}$\ensuremath{\gg}${\mathrm{\ensuremath{\omega}}}_{21}$ (${\mathrm{\ensuremath{\omega}}}_{\mathit{ij}}$=${\mathrm{\ensuremath{\omega}}}_{\mathit{i}}$-${\mathrm{\ensuremath{\omega}}}_{\mathit{j}}$). field, having frequency \ensuremath{\Omega}\ensuremath{\gtrsim}${\mathrm{\ensuremath{\omega}}}_{31}$, can be considered drive 2-3 transition only. Spontaneous emission from ground state, via normally counter-rotating atom-vacuum interaction term in Hamiltonian, conserves energy when photon is subsequently absorbed laser explained terms Raman process, an between field coupled system. Connection made dressed-atom description problem. \textcopyright{} 1996 American Physical Society.