Coherently driven non-classical light emission from a quantum dot
arXiv:0707.3808
Abstract
Narrow line-widths and the possibility of enhanced spontaneous emission via coupling to microcavities make semiconductor quantum dots ideal for harnessing coherent quantum phenomena at the single photon level. So far, however, all approaches have relied on incoherent pumping, which limits the desirable properties of the emission. In contrast, coherent excitation was recognized to be necessary for providing both improved photon indistinguishability and high efficiency, and offers the quantum control capabilities required for basic qubit manipulations. Here we achieve, for the first time, resonant and coherent excitation of a quantum dot with simultaneous collection of the non-classical photon emission. Second-order correlation measurements show the unique signature of a coherently-driven two-level quantum emitter: the photon statistics become oscillatory at high driving fields, reflecting the coherent evolution of the excitonic ground state of the quantum dot.
12 pages, 5 figures, submitted to Nature Photonics
References in corpus (5)
- Triggered single photons from a quantum dot
- Review: Semiconductor Quantum Light Sources
- Quantum dot single photon sources: Prospects for applications in linear optics quantum information processing
- Photon Antibunching from a Single Quantum Dot-Microcavity System in the Strong Coupling Regime
- Controlled Single-Photon Emission from a Single Trapped Two-Level Atom