Purcell modification of Auger and interatomic Coulombic decay

Abstract

An excited two-atom system can decay via different competing relaxation processes. If the excess energy is sufficiently high the system may not only relax via spontaneous emission but can also undergo interatomic Coulombic decay (ICD) or even Auger decay. We provide analytical expressions for the rates by including them into the same quantum optical framework on the basis of macroscopic quantum electrodynamics. By comparing the rates in free space we derive the atomic properties determining which decay channel dominates the relaxation. We show that by modifying the excitation propagation of the respective process via macroscopic bodies, in the spirit of the Purcell effect, one can control the ratio between the two dominating decay rates. We can relate the magnitude of the effect to characteristic length scales of each process, analyse the impact of a simple close-by surface onto a general two-atom system in detail and discuss the effect of a cavity onto the decay rates. We finally apply our theory to the example of a doubly excited HeNe-dimer.

References in corpus (11)

• Spontaneous decay in the presence of dispersing and absorbing bodies: general theory and application to a spherical cavity
• Dispersion forces in macroscopic quantum electrodynamics
• Intermolecular energy transfer in the presence of dispersing and absorbing media
• Vibrationally Resolved Decay Width of Interatomic Coulombic Decay in HeNe
• Fundamental figures of merit for engineering Forster resonance energy transfer
• X-ray quantum optics with Mössbauer nuclei embedded in thin film cavities
• The virtual photon approximation for three-body interatomic Coulombic decay
• Macroscopic Quantum Electrodynamics and Density Functional Theory Approaches to Dispersion Interactions between Fullerenes
• Pushing Purcell-enhancement beyond its limits
• Orientational dependence of the van der Waals interactions for finite-sized particles
• Asymptotic behavior of photoionization cross section in a central field. Ionization of the $p$ states

Cited by in corpus (1)

• Macroscopic quantum electrodynamics theory of resonance energy transfer involving chiral molecules