Photon echoes from (In,Ga)As quantum dots embedded in a Tamm-plasmon microcavity

M. Salewski, S. V. Poltavtsev, Yu V. Kapitonov, J. Vondran, D. R. Yakovlev, C. Schneider, M. Kamp, S. Höfling, Ruth Oulton, I. A. Akimov, A. V. Kavokin, M. Bayer

Research output: Contribution to journalArticle (Academic Journal)peer-review

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Abstract

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 approximately 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 nonradiative processes are negligible, as confirmed from time-resolved photoluminescence.

Original languageEnglish
Article number035312
Number of pages6
JournalPhysical Review B
Volume95
Issue number3
Early online date30 Jan 2017
DOIs
Publication statusPublished - Jan 2017

Structured keywords

  • Bristol Quantum Information Institute

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