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Self-homodyne measurement of a dynamic Mollow triplet in the solid state


The study of the light–matter interaction at the quantum scale has been enabled by the cavity quantum electrodynamics (CQED) architecture1, in which a quantum two-level system strongly couples to a single cavity mode. Originally implemented with atoms in optical cavities2,3, CQED effects are now also observed with artificial atoms in solid-state environments4,5,6. Such realizations of these systems exhibit fast dynamics, making them attractive candidates for devices including modulators and sources in high-throughput communications. However, these systems possess large photon out-coupling rates that obscure any quantum behaviour at large excitation powers. Here, we have used a self-homodyning7 interferometric technique that fully employs the complex mode structure of our nanofabricated cavity8,9,10 to observe a quantum phenomenon known as the dynamic Mollow triplet11. We expect this interference to facilitate the development of arbitrary on-chip quantum state generators, thereby strongly influencing quantum lithography, metrology and imaging.

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Figure 1: Characterization of the strongly coupled system.
Figure 2: Evidence for Fano-induced self-homodyne interference from the detuned strongly coupled system.
Figure 3: Emergence of dynamic Mollow-like triplets from the detuned strongly coupled system under pulsed resonant excitation of the QD-like polariton.


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The authors acknowledge financial support from the Air Force Office of Scientific Research, the MURI Center for Multifunctional Light–Matter Interfaces based on Atoms and Solids, and support from the Army Research Office (grant no. W911NF1310309). K.A.F. acknowledges support from the Lu Stanford Graduate Fellowship and the National Defense Science and Engineering Graduate Fellowship. K.M. acknowledges support from the Alexander von Humboldt Foundation. A.Y.P. acknowledges support from the Bechtolsheim Stanford Graduate Fellowship. Y.A.K. acknowledges support from the Stanford Graduate Fellowship and the National Defense Science and Engineering Graduate Fellowship. K.G.L. acknowledges support from the Swiss National Science Foundation.

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K.A.F. and K.M. conceived and performed the experiments. K.A.F. performed the theoretical work and modelling. A.R. fabricated the device. T.S. performed MBE growth of the QD structure. A.P., Y.A.K., C.D. and K.G.L. provided expertise. J.V. supervised the project. All authors participated in the discussion and understanding of the results.

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Correspondence to Kevin A. Fischer or Jelena Vučković.

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The authors declare no competing financial interests.

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Fischer, K., Müller, K., Rundquist, A. et al. Self-homodyne measurement of a dynamic Mollow triplet in the solid state. Nature Photon 10, 163–166 (2016).

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