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Experimental verification of the very strong coupling regime in a GaAs quantum well microcavity
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dc.contributor.author | Brodbeck, S. | |
dc.contributor.author | De Liberato, S. | |
dc.contributor.author | Amthor, M. | |
dc.contributor.author | Klaas, M. | |
dc.contributor.author | Kamp, M. | |
dc.contributor.author | Worschech, L. | |
dc.contributor.author | Schneider, C. | |
dc.contributor.author | Höfling, Sven | |
dc.date.accessioned | 2017-07-13T23:34:21Z | |
dc.date.available | 2017-07-13T23:34:21Z | |
dc.date.issued | 2017-07-14 | |
dc.identifier | 250176720 | |
dc.identifier | 3faada1c-66f4-41d5-8f98-0eecade67d75 | |
dc.identifier | 85025447771 | |
dc.identifier | 000405281700003 | |
dc.identifier.citation | Brodbeck , S , De Liberato , S , Amthor , M , Klaas , M , Kamp , M , Worschech , L , Schneider , C & Höfling , S 2017 , ' Experimental verification of the very strong coupling regime in a GaAs quantum well microcavity ' , Physical Review Letters , vol. 119 , no. 2 , 027401 . https://doi.org/10.1103/PhysRevLett.119.027401 | en |
dc.identifier.issn | 0031-9007 | |
dc.identifier.uri | https://hdl.handle.net/10023/11201 | |
dc.description | This work was supported by the State of Bavaria. S.D.L. acknowledges support from a Royal Society Research Fellowship and from EPSRC Grant No. EP/M003183/1. | en |
dc.description.abstract | The dipole coupling strength g between cavity photons and quantum well excitons determines the regime of light matter coupling in quantum well-microcavities. In the strong coupling regime, a reversible energy between exciton and cavity photon takes place, which leads to the formation of hybrid polaritonic resonances. If the coupling is further increased, a hybridization of different single exciton states emerges, which is referred to as the very strong coupling regime. In semiconductor quantum wells such a regime is predicted to manifest as a photon-mediated electron-hole coupling leading to different excitonic wave functions for the two polaritonic branches when the ratio of the coupling strength to exciton binding energy gEB/ approaches unity. Here, we verify experimentally the existence of this regime in magneto-optical measurements on a microcavity characterized by gEB/≈0.64, showing that the average electron-hole separation of the upper polariton is significantly increased compared to the bare quantum well exciton Bohr radius. This yields a diamagnetic shift around zero detuning that exceeds the shift of the lower polariton by one order of magnitude and the bare quantum well exciton diamagnetic shift by a factor of two. The lower polariton exhibits a diamagnetic shift smaller than expected from the coupling of a rigid exciton to the cavity mode which suggests more tightly bound electron-hole pairs than in the bare quantum well. | |
dc.format.extent | 6 | |
dc.format.extent | 412220 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physical Review Letters | en |
dc.subject | QC Physics | en |
dc.subject | TK Electrical engineering. Electronics Nuclear engineering | en |
dc.subject | NDAS | en |
dc.subject.lcc | QC | en |
dc.subject.lcc | TK | en |
dc.title | Experimental verification of the very strong coupling regime in a GaAs quantum well microcavity | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Condensed Matter Physics | en |
dc.identifier.doi | https://doi.org/10.1103/PhysRevLett.119.027401 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2017-07-13 |
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