Quantum theory of electron tunneling into intersubband cavity polariton states

Simone de Liberato (1, 2) , Cristiano Ciuti (1)

1 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
2 LPA - Laboratoire Pierre Aigrain

Recent mid-infrared absorption and electroluminescence experiments on microcavities embedding quantum wells have shown strong coupling between a cavity photon mode and the transition between two conduction subbands, being the lowest one filled with a dense two-dimensional electron gas. Through a non-perturbative quantum theory, here we investigate how the electronic states are modified by the coupling to the microcavity vacuum field. We show that resonant electron tunneling from a narrow-band injector can selectively excite superradiant states and produce ultraefficient polariton electroluminescence.

Domaines: Physique Quantique [quant-ph]; Electrons fortement corrélés [cond-mat.str-el]; Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Simone de Liberato, Cristiano Ciuti. Quantum theory of electron tunneling into intersubband cavity polariton states. 2008. ⟨hal-00259601v2⟩