Single photon superradiance and cooperative Lamb shift in an optoelectronic device

Giulia Frucci (1) , Simon Huppert (1) , Angela Vasanelli (1) , Baptiste Dailly (1) , Yanko Todorov (1) , Carlo Sirtori (1) , Grégoire Beaudoin (2) , Isabelle Sagnes (2)

1 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
2 LPN - Laboratoire de photonique et de nanostructures

Single photon superradiance is a strong enhancement of spontaneous emission appearing when a single excitation is shared between a large number of two-level systems. This enhanced rate can be accompanied by a shift of the emission frequency, the cooperative Lamb shift, issued from the exchange of virtual photons between the emitters. In this work we present a semiconductor optoelectronic device allowing the observation of these two phenomena at room temperature. We demonstrate experimentally and theoretically that plasma oscillations in spatially separated quantum wells interact through real and virtual photon exchange. This gives rise to a superradiant mode displaying a large cooperative Lamb shift.

Domains: Quantum Physics [quant-ph]; Other [cond-mat.other]

Giulia Frucci, Simon Huppert, Angela Vasanelli, Baptiste Dailly, Yanko Todorov, et al.. Single photon superradiance and cooperative Lamb shift in an optoelectronic device. 2016. ⟨hal-01384780⟩