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Phonon-Dressed Mollow Triplets in Semiconductor Cavity-QED

October 10, 2011 - 12:30pm
Speaker: 
Stephen Hughes
Institution: 
Queen´s University

In 1969 Mollow demonstrated that the fluorescence spectrum of a laser driven two-level atom has two Rabi sidebands in addition to a central Rayleigh-scattering peak, producing the so-called “Mollow triplet” [1]. This striking coherent optics phenomenon has been widely studied in a number of atomic and molecular systems. For decades the semiconductor optics community has been trying to access the “quantum-dot Mollow triplet,” and, by combining single quantum dots with semiconductor cavities, recently succeeded [2].
Quantum dots are often likened to “artificial atoms,’’ but they have unique solid-state microscopic processes, such as electron-phonon scattering. This talk will describe the resonance fluorescence spectra of a driven quantum dot placed inside a high-Q semiconductor microcavity and interacting with an acoustic phonon bath [3]. Several new regimes of phonon-dressed cavity-QED will be discussed—including “excitation induced dephasing” and “cavity feeding”, two pronounced effects that emerge as part of the semiconductor Mollow triplet [3,4]. The underlying physics of electron-phonon scattering with be elucidated through quantum trajectory simulations.

[1] B. R. Mollow, Phys. Rev. 188, 1969 (1969).
[2] See, e.g., A. Muller et al., Phys. Rev. Lett. 99, 187402 (2007); E. B. Flagg et al., Nature Phys. 5, 203 (2009); A. N. Vamivakas et al., Nature Phys. 5, 198 (2009).
[3] C. Roy and S. Hughes, Phys. Rev. Lett. 106, 247403 (2011).
[4] S. M. Ulrich, S. Ates, S. Reitzenstein, A Loffler, A. Forchel, and P. Michler, Phys. Rev. Lett. 106, 247402 (2011).

1201 Physics Building
College Park, MD 20742