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Volume 13 Issue 6, June 2019

Volume 13 Issue 6

Organic polariton logic gates

A polariton transistor based on strong light–matter coupling in a thin organic layer in an optical microcavity allows fast switching and amplification of states at room temperature and the creation of all-optical logic.

See Lagoudakis et al.

Image: Anton V. Zasedatelev, Skoltech. Cover Design: Bethany Vukomanovic

Comment

  • Comment |

    As the most abundant biopolymer on Earth since it can be found in every plant cell wall, cellulose has emerged as an ideal candidate for the development of renewable and biodegradable photonic materials, substituting conventional pigments.

    • Bruno Frka-Petesic
    • Silvia Vignolini

Books & Arts

Research Highlights

News & Views

  • News & Views |

    Organic microcavity optical transistors open up opportunities for real-world optical switching at room temperature. Now, an all-optical switch at room temperature, using an organic exciton medium with high quantum yield, brings us a step closer to all-optical logical networks.

    • Zheng Sun
    • David W. Snoke
  • News & Views |

    A phonon laser made from a levitated silica nanosphere held in a controllable optical trap offers a useful tool for studying phonon–photon interactions.

    • Ran Huang
    • Hui Jing
  • News & Views |

    Ultra-long phosphorescence with an emission colour that can be tuned from violet to green is obtained from an organic phosphor featuring several different emitting centres. Such ‘smart’ materials are promising for applications in displays, sensors and bioimaging.

    • Hongwei Wu
    • Yanli Zhao
  • News & Views |

    High-speed optical modulators based on silicon, quantum cascade detectors, a photothermal phase-contrast microscope and spin light-emitting diodes with low threshold current density were highlights of the Japan Society of Applied Physics Spring Meeting.

    • Noriaki Horiuchi

Letters

  • Letter |

    Net gain of ~10 dB µm–1 and sub-picosecond switching time are shown at room temperature for optical transistors using polymers in a microcavity.

    • Anton V. Zasedatelev
    • Anton V. Baranikov
    • Pavlos G. Lagoudakis
  • Letter |

    By nesting a Kerr microresonator in a fibre loop with gain, 50-nm-wide bright microcavity-based soliton combs with a mode efficiency of 75% can be induced at average powers more than one order of magnitude lower than the Lugiato–Lefever soliton power threshold, facilitating real-world applications.

    • Hualong Bao
    • Andrew Cooper
    • Alessia Pasquazi
  • Letter |

    Transduction of valley information to mechanical states in a monolayer MoS2 resonator can be realized by optically pumping the valley carriers and applying an out-of-plane magnetic field gradient to induce a displacement-dependent valley splitting.

    • Hao-Kun Li
    • King Yan Fong
    • Xiang Zhang
  • Letter |

    A phonon laser based on an optically levitated silica nanosphere is demonstrated. A lasing threshold—a phase transition from Brownian motion to coherent oscillation—is observed when the modulation depth of the trapping beam power is increased.

    • Robert M. Pettit
    • Wenchao Ge
    • A. Nick Vamivakas
  • Letter |

    A hybrid technique of stimulated Raman excited fluorescence that integrates superb detection sensitivity and fine chemical specificity is demonstrated, offering all-far-field single-molecule Raman spectroscopy and imaging without plasmonic enhancement.

    • Hanqing Xiong
    • Lixue Shi
    • Wei Min

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