Polaritons in cuprous oxide perturbed by LA-phonons
| dc.creator | Roslyak, Oleksiy | |
| dc.creator | Birman, Joseph L. | |
| dc.date | 2007-03-25 | |
| dc.date | 2007-04-15 | |
| dc.date.accessioned | 2026-07-07T07:56:36Z | |
| dc.date.available | 2026-07-07T07:56:36Z | |
| dc.description | We present a comparative analysis of a 'conventional' phonoriton (coherent superposition of exciton-photon-phonon) and a polariton (coherent exciton-photon superposition) 'weakly' coupled to the LA-phonons bath. Depending on duration of the pumping laser field the phonon-induced decoherence results in two distinct types of excitation. Long ($ms$) laser pumping pulses form an 'equilibrium' polariton. The generic feature here is a pronounced photo-thermal bi-stability. i.e. formation of four distinct branches. Transitions between branches can be achieved by excitation energy fluctuations as small as $200 neV$ which may impede BEC of the para-excitons. Short ($μs$) laser pulses create a 'quasi-equilibrium' polariton. In the latter case, for some critical intensity of the laser field we demonstrate possibility of strong luminicence from a highly unstable localized state on the lower polariton branch. | |
| dc.description | 7 pages, 6 gigures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0703650 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0703650 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/127369 | |
| dc.subject | Materials Science | |
| dc.title | Polaritons in cuprous oxide perturbed by LA-phonons | |
| dc.type | text |