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      An on-chip architecture for self-homodyned nonclassical light

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          Abstract

          In the last decade, there has been remarkable progress on the practical integration of on-chip quantum photonic devices yet quantum state generators remain an outstanding challenge. Simultaneously, the quantum-dot photonic-crystal-resonator platform has demonstrated a versatility for creating nonclassical light with tunable quantum statistics, thanks to a newly discovered self-homodyning interferometric effect that preferentially selects the quantum light over the classical light when using an optimally tuned Fano resonance. In this work, we propose a general structure for the cavity quantum electrodynamical generation of quantum states from a waveguide-integrated version of the quantum-dot photonic-crystal-resonator platform, which is specifically tailored for preferential quantum state transmission. We support our results with rigorous Finite-Difference Time-Domain and quantum optical simulations, and show how our proposed device can serve as a robust generator of highly pure single- and even multi-photon states.

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          Most cited references12

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          High-Q photonic nanocavity in a two-dimensional photonic crystal.

          Photonic cavities that strongly confine light are finding applications in many areas of physics and engineering, including coherent electron-photon interactions, ultra-small filters, low-threshold lasers, photonic chips, nonlinear optics and quantum information processing. Critical for these applications is the realization of a cavity with both high quality factor, Q, and small modal volume, V. The ratio Q/V determines the strength of the various cavity interactions, and an ultra-small cavity enables large-scale integration and single-mode operation for a broad range of wavelengths. However, a high-Q cavity of optical wavelength size is difficult to fabricate, as radiation loss increases in inverse proportion to cavity size. With the exception of a few recent theoretical studies, definitive theories and experiments for creating high-Q nanocavities have not been extensively investigated. Here we use a silicon-based two-dimensional photonic-crystal slab to fabricate a nanocavity with Q = 45,000 and V = 7.0 x 10(-14) cm3; the value of Q/V is 10-100 times larger than in previous studies. Underlying this development is the realization that light should be confined gently in order to be confined strongly. Integration with other photonic elements is straightforward, and a large free spectral range of 100 nm has been demonstrated.
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            The Past, Present, and Future of Silicon Photonics

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              Controlling cavity reflectivity with a single quantum dot.

              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 weak and strong coupling regimes of interaction between the photonic crystal cavity and a single quantum dot in photoluminescence. In the weak coupling regime, the quantum dot radiative lifetime is modified; in the strong coupling regime, 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 dots. Such experiments have recently been performed in atomic systems and superconducting circuit QED systems, 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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                Author and article information

                Journal
                2016-11-04
                Article
                1611.01566
                3a5aa21e-4060-4cd2-8cc1-1406a55e4e85

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                History
                Custom metadata
                quant-ph cond-mat.mes-hall

                Quantum physics & Field theory,Nanophysics
                Quantum physics & Field theory, Nanophysics

                Comments

                Paper references associated Jupyter notebook deposited with arXiv as ancillary file with the PDF; no license indicated:

                "We have included a runnable Jupyter notebook to the arXiv submission that contains all the information necessary to reproduce our quantum optical simulations" (https://arxiv.org/abs/1611.01566v4)

                "There are 1 ancillary file associated with this article. You may download them individually using the links below, or you may download the entire source package as a gzipped tar file (.tar.gz). See ancillary files help for more information about arXiv support for ancillary material." (https://arxiv.org/src/1611.01566v4/anc; file name on menu = QuTiP-example-homodyne-Jaynes-Cummings-system.ipynb )

                 

                 

                 

                2017-10-22 17:49 UTC
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