Photon echoes from (In,Ga)As quantum dots embedded in a Tamm-plasmon microcavity
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We report on the coherent optical response from an ensemble of (In,Ga)As quantum dots (QDs) embedded in a planar Tamm-plasmon microcavity with a quality factor of approx. 100. Significant enhancement of the light-matter interaction is demonstrated under selective laser excitation of those quantum dots which are in resonance with the cavity mode. The enhancement is manifested through Rabi oscillations of the photon echo, demonstrating coherent control of excitons with picosecond pulses at intensity levels more than an order of magnitude smaller as compared with bare quantum dots. The decay of the photon echo transients is weakly changed by the resonator indicating a small decrease of the coherence time T2 which we attribute to the interaction with the electron plasma in the metal layer located close (40 nm) to the QD layer. Simultaneously we see a reduction of the population lifetime T1, inferred from the stimulated photon echo, due to an enhancement of the spontaneous emission by a factor of 2, which is attributed to the Purcell effect, while non-radiative processes are negligible as confirmed from time-resolved photoluminescence.
Salewski , M , Poltavtsev , S V , Kapitonov , Y V , Vondran , J , Yakovlev , D R , Schneider , C , Kamp , M , Höfling , S , Oulton , R , Akimov , I A , Kavokin , A V & Bayer , M 2017 , ' Photon echoes from (In,Ga)As quantum dots embedded in a Tamm-plasmon microcavity ' Physical Review. B, Condensed matter and materials physics , vol 95 , no. 3 , 035312 . DOI: 10.1103/PhysRevB.95.035312
Physical Review. B, Condensed matter and materials physics
© 2017 American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at journals.aps.org/prb / https:/doi.org/10.1103/PhysRevB.95.035312
We acknowledge the financial support by the Deutsche Forschungsgemeinschaft through the Collaborative Research Centre TRR 142 and the International Collaborative Research Centre 160. S.V.P. and Yu.V.K. thank the Russian Foundation of Basic Research for partial financial support (contracts no. ofi_m 16-29-03115 and no. 15-52-12016NNIO_a). M.B. acknowledges partial financial support from the Russian Ministry of Science and Education (contract no. 14.Z50.31.0021). Yu.V.K. acknowledges Saint Petersburg State University for a research grant 11.42.993.2016. The project SPANGL4Q acknowledges financial support from the Future and Emerging Technologies (FET) programme within the Seventh Framework Programme for Research of the European Commission, under FET-Open grant no. FP7-284743.
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