Controlling cavity reflectivity with a single quantum dot

Abstract

Solid-state cavity quantum electrodynamics (QED) systems offer a robust and scalable platform for quantum optics experiments and the development of quantum information processing devices. In particular, systems based on photonic crystal nanocavities and semiconductor quantum dots have seen rapid progress. Recent experiments have allowed the observation of weak1 and strong coupling2,3 regimes of interaction between the photonic crystal cavity and a single quantum dot in photoluminescence. In the weak coupling regime1, the quantum dot radiative lifetime is modified; in the strong coupling regime3, the coupled quantum dot also modifies the cavity spectrum. Several proposals for scalable quantum information networks and quantum computation rely on direct probing of the cavity–quantum dot coupling, by means of resonant light scattering from strongly or weakly coupled quantum dots4,5,6,7,8,9. Such experiments have recently been performed in atomic systems10,11,12 and superconducting circuit QED systems13, but not in solid-state quantum dot–cavity QED systems. Here we present experimental evidence that this interaction can be probed in solid-state systems, and show that, as expected from theory, the quantum dot strongly modifies the cavity transmission and reflection spectra. We show that when the quantum dot is coupled to the cavity, photons that are resonant with its transition are prohibited from entering the cavity. We observe this effect as the quantum dot is tuned through the cavity and the coupling strength between them changes. At high intensity of the probe beam, we observe rapid saturation of the transmission dip. These measurements provide both a method for probing the cavity–quantum dot system and a step towards the realization of quantum devices based on coherent light scattering and large optical nonlinearities from quantum dots in photonic crystal cavities.

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Figure 1: Experiment set-up.
Figure 2: Photoluminescence of a single quantum dot tuned through strong coupling to a photonic crystal cavity.
Figure 3: Quantum dot–controlled cavity reflectivity at different probe wavelengths A–E, as indicated in Fig. 2b .
Figure 4: Quantum-dot-controlled cavity reflectivity versus probe beam power for probe laser detuning of Δ λ = -0.012 nm from the anticrossing point.

References

  1. 1

    Englund, D. et al. Controlling the spontaneous emission rate of single quantum dots in a two-dimensional photonic crystal. Phys. Rev. Lett. 95, 013904 (2005)

    ADS  Article  PubMed  PubMed Central  Google Scholar 

  2. 2

    Yoshie, T. et al. Vacuum Rabi splitting with a single quantum dot in a photonic crystal nanocavity. Nature 432, 200–203 (2004)

    ADS  CAS  Article  PubMed  Google Scholar 

  3. 3

    Hennessy, K. et al. Quantum nature of a strongly coupled single quantum dot-cavity system. Nature 445, 896–899 (2007)

    ADS  CAS  Article  Google Scholar 

  4. 4

    Cirac, J. I., Zoller, P., Kimble, H. J. & Mabuchi, H. Quantum state transfer and entanglement distribution among distant nodes in a quantum network. Phys. Rev. Lett. 78, 3221–3224 (1997)

    ADS  CAS  Article  Google Scholar 

  5. 5

    Imamoglu, A. et al. Quantum information processing using quantum dot spins and cavity QED. Phys. Rev. Lett. 83, 4204–4207 (1999)

    ADS  CAS  Article  Google Scholar 

  6. 6

    Duan, L. M. & Kimble, H. J. Scalable photonic quantum computation through cavity-assisted interactions. Phys. Rev. Lett. 92, 127902 (2004)

    ADS  Article  PubMed  Google Scholar 

  7. 7

    Childress, L., Taylor, J. M., Sorensen, A. S. & Lukin, M. D. Fault-tolerant quantum repeaters with minimal physical resources and implementations based on single-photon emitters. Phys. Rev. A 72, 052330 (2005)

    ADS  Article  Google Scholar 

  8. 8

    Waks, E. & Vučković, J. Dipole induced transparency in drop-filter cavity-waveguide systems. Phys. Rev. Lett. 96, 153601 (2006)

    ADS  Article  PubMed  Google Scholar 

  9. 9

    Ladd, T. D., van Loock, P. K., Nemoto, K., Munro, W. J. & Yamamoto, Y. Hybrid quantum repeater based on dispersive CQED interactions between matter qubits and bright coherent light. N. J. Phys. 8, 184 (2006)

    Article  Google Scholar 

  10. 10

    Birnbaum, K. M. et al. Photon blockade in an optical cavity with one trapped atom. Nature 436, 87–90 (2005)

    ADS  CAS  Article  Google Scholar 

  11. 11

    Rauschenbeutel, A. et al. Coherent operation of a tunable quantum phase gate in cavity QED. Phys. Rev. Lett. 83, 5166–5169 (1999)

    ADS  CAS  Article  Google Scholar 

  12. 12

    Nogues, G. et al. Seeing a single photon without destroying it. Nature 400, 239–242 (1999)

    ADS  CAS  Article  Google Scholar 

  13. 13

    Schuster, D. I. et al. Resolving photon number states in a superconducting circuit. Nature 445, 515–518 (2007)

    ADS  CAS  Article  Google Scholar 

  14. 14

    Kimble, H. J. in Cavity Quantum Electrodynamics (ed. Berman, P.) 213–219 (Academic, San Diego, 1994)

    Google Scholar 

  15. 15

    Akahane, Y., Asano, T., Song, B.-S. & Noda, S. High-Q photonic nanocavity in a two-dimensional photonic crystal. Nature 425, 944–947 (2003)

    ADS  CAS  Article  PubMed  Google Scholar 

  16. 16

    Faraon, A. et al. Local quantum dot tuning on photonic crystal chips. Appl. Phys. Lett. 90, 213110 (2007)

    ADS  Article  Google Scholar 

  17. 17

    Gerardot, B. D. et al. Contrast in transmission spectroscopy of a single quantum dot. Appl. Phys. Lett. 90, 221106 (2007)

    ADS  Article  Google Scholar 

  18. 18

    Tan, S. M. A computational toolbox for quantum and atomic physics. J. Opt. B 1, 424–432 (1999)

    ADS  CAS  Article  Google Scholar 

  19. 19

    Hood, C. J., Chapman, M. S., Lynn, T. W. & Kimble, H. J. Real-time cavity QED with single atoms. Phys. Rev. Lett. 80, 4157–4160 (1998)

    ADS  CAS  Article  Google Scholar 

  20. 20

    Auffeves-Garnier, A., Simon, C., Gerard, J. M. & Poizat, J.-P. Giant optical nonlinearity induced by a single two-level system interacting with a cavity in the Purcell regime. Phys. Rev. A 75, 053823 (2007)

    ADS  Article  Google Scholar 

  21. 21

    Englund, D., Faraon, A., Zhang, B., Yamamoto, Y. & Vučković, J. Generation and transfer of single photons on a photonic crystal chip. Opt. Express 15, 5550–5558 (2007)

    ADS  Article  PubMed  Google Scholar 

  22. 22

    Faraon, A., Waks, E., Englund, D., Fushman, I. & Vučković, J. Efficient photonic crystal cavity-waveguide couplers. Appl. Phys. Lett. 90, 073102 (2007)

    ADS  Article  Google Scholar 

  23. 23

    Reiner, J. E., Smith, W. P., Orozco, L. A., Carmichael, H. J. & Rice, P. R. Time evolution and squeezing of the field amplitude in cavity QED. J. Opt. Soc. Am. B 18, 1911–1921 (2001)

    ADS  CAS  Article  Google Scholar 

  24. 24

    Imoto, N., Haus, H. A. & Yamamoto, Y. Quantum nondemolition measurement of the photon number via the optical Kerr effect. Phys. Rev. A 32, 2287–2292 (1985)

    ADS  CAS  Article  Google Scholar 

  25. 25

    Vučković, J., Englund, D., Fattal, D., Waks, E. & Yamamoto, Y. Generation and manipulation of nonclassical light using photonic crystals. Physica E 32, 466–470 (2006)

    ADS  Article  Google Scholar 

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Acknowledgements

Financial support was provided by the ONR Young Investigator Award, the MURI Center for photonic quantum information systems (ARO/DTO Program), the Okawa Foundation Faculty Research Grant, and the CIS Seed fund. D.E. and I.F. were also supported by the NDSEG fellowship. Work was performed in part at the Stanford Nanofabrication Facility of NNIN supported by the National Science Foundation.

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Correspondence to Jelena Vučković.

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Englund, D., Faraon, A., Fushman, I. et al. Controlling cavity reflectivity with a single quantum dot. Nature 450, 857–861 (2007). https://doi.org/10.1038/nature06234

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