Physics articles within Nature Photonics

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  • Interview |

    Can excitons be used to achieve scalable control of quantum light? Steffen Michaelis de Vasconcellos explained toNature Photonicsthat the optoelectrical control of exciton qubits in quantum dots offers great promise.

    • David Pile

  • News & Views |

    The generation of entangled photon pairs is usually a complex process involving optically driven schemes and nonlinear optics. The recent demonstration of an electrically powered light-emitting diode that is capable of this task looks set to greatly simplify experiments in the field of quantum information processing.

    • Val Zwiller

  • News & Views |

    Common sense suggests that complex phenomena such as Bose–Einstein condensation require complicated experimental set-ups to be observed. But when it comes to the field of photonics, the simplest system may sometimes reveal the most unexpected surprises.

    • Andrea Fratalocchi

  • Article |

    Non-Gaussian continuous variable operations are demonstrated for the first time at telecommunications wavelengths. Squeezed states were generated using a titanium superconducting sensor that can resolve the incident photon number. Reconstructed Wigner functions of the generated quantum states indicated non-Gaussian operation.

    • Naoto Namekata
    • , Yuta Takahashi
    •  & Shuichiro Inoue

  • News & Views |

    An optical technique that allows the coherence of electron spin inside a quantum dot to be manipulated over microsecond timescales may have important applications in quantum information processing.

    • Manfred Bayer

  • News & Views |

    The experimental demonstration of polariton lasing from an organic optical microcavity is an important step towards the development of practical devices that exploit coupled states of light and matter and operate at room temperature.

    • G. C. La Rocca

  • Product Focus |

    The ability to capture and analyse complex, high-speed electronic signals makes the oscilloscope one of the most useful and powerful tools in an engineer's laboratory, reports The Scott Partnership.

  • Letter |

    Using a composite photonic-crystal structure composed of both a square and rectangular lattice, scientists successfully realize an on-chip semiconductor laser whose emitted beams can be dynamically controlled by varying their relative lattice constants.

    • Yoshitaka Kurosaka
    • , Seita Iwahashi
    •  & Susumu Noda

  • News & Views |

    A scheme for polishing glass to an angstrom-scale surface quality and an all-optical pH measurement technique were just two of the elegant ideas presented at this year's spring meeting of the Japan Society of Applied Physics.

    • Noriaki Horiuchi

  • News & Views |

    The use of a fabrication scheme for controlling the symmetry, uniformity and location of quantum dots has resulted in a superior source of entangled photon pairs.

    • David Gershoni

  • Letter |

    An ultrafast, all-optical spin echo technique is used to increase the decoherence time of a single quantum dot electron spin from nanoseconds to several microseconds. The ratio of decoherence time to gate time exceeds 105, suggesting strong promise for future photonic quantum information processors and repeater networks.

    • David Press
    • , Kristiaan De Greve
    •  & Yoshihisa Yamamoto

  • News & Views |

    The demonstration of coherent storage and retrieval of subnanosecond light pulses in an atomic vapour opens the door to optical quantum memories with gigahertz bandwidths.

    • Hugues de Riedmatten

  • Letter |

    Quantum memories for storing and releasing photons are required for quantum computers and quantum communications. So far, their operational bandwidths have limited data-rates to megahertz. Researchers now demonstrate coherent storage and retrieval of subnanosecond low-intensity light pulses with spectral bandwidths exceeding 1 GHz.

    • K. F. Reim
    • , J. Nunn
    •  & I. A. Walmsley

  • Editorial |

    An iPhone application for browsing nature.com content may change the way we access research news.

  • News & Views |

    On-demand single-photon sources with high efficiency are required to realize many of the applications of quantum optics. By exploiting photonic mode transformation in a tapered nanowire, researchers have created a source that has an unprecedented extraction efficiency over an extremely broad spectral range.

    • Stefan Strauf

  • News & Views |

    Optical loss degrades quantum correlations, hindering the use of quantum quadrature entanglement for many applications. Researchers have now experimentally demonstrated that this entanglement can be recovered using photon subtraction.

    • Alexei Ourjoumtsev

  • Article |

    Tailoring of arbitrary single-mode states of travelling light up to the two-photon level is proposed and demonstrated. The desired state is remotely prepared in the signal channel of spontaneous parametric down-conversion by means of conditional measurements on the idler channel.

    • Erwan Bimbard
    • , Nitin Jain
    •  & A. I. Lvovsky

  • Letter |

    Distillation of entangled photons is essential for applications such as long-distance quantum communication and high-fidelity quantum teleportation. Distillation from Gaussian input states is experimentally realized, resulting in a large gain in entanglement.

    • Hiroki Takahashi
    • , Jonas S. Neergaard-Nielsen
    •  & Masahide Sasaki

  • News & Views |

    Micrometre-sized atomic vapour cells hosting robust entangled atomic states at room temperature offer a promising route to the realization of quantum photonic devices such as quantum gates and single-photon sources.

    • Jan-Michael Rost

  • News & Views |

    Researchers are proposing a new experiment that will probe fundamental aspects of the quantum vacuum by searching for highly elusive photon–photon scattering events.

    • Mattias Marklund

  • Letter |

    A quantum cascade laser with a wall-plug efficiency of up to 50% is experimentally realized when operated at low temperatures and in pulsed mode. The high-efficiency performance is achieved by implementing an ultrastrong coupling between the injector and active regions.

    • Peter Q. Liu
    • , Anthony J. Hoffman
    •  & Claire F. Gmachl

  • Letter |

    A matterless double-slit scenario is proposed, in which photons generated from head-on collisions between a probe laser field and two ultraintense laser beams form a double-slit interference pattern. Such electromagnetic fields are predicted to induce material-like behaviour in a vacuum, supporting elastic scattering between photons.

    • Ben King
    • , Antonino Di Piazza
    •  & Christoph H. Keitel

  • Letter |

    A mid-infrared quantum cascade laser that emits more light than heat and features a high wall-plug efficiency of up to 53% when operated a temperature of 40 K is reported. The device utilizes a single-well injector design.

    • Yanbo Bai
    • , Steven Slivken
    •  & Manijeh Razeghi

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