Volume 1 Issue 2, February 2018

Volume 1 Issue 2

Magnet-free isolation with nonlinear resonators

Efficient and magnet-free isolators can be built by coupling two nonlinear resonators through a suitable delay line. The schematic illustration on the cover highlights the combination of a Fano and a Lorentzian nonlinear resonator circuit, where the tailored dispersion of the two resonators enables full transmission when excited from one side, but zero transmission when excited from the opposite side.

See Sounas et al. and News & Views by Krishnaswamy et al.

Image: Erik Zumalt, Andrea Alù, Dimitrios Sounas, University of Texas at Austin. Cover Design: Karen Moore.

Editorial

  • Editorial |

    Advances in flexible electronics and soft robotics are yielding wireless devices and untethered machines of increasing sophistication.

Research Highlights

News & Views

  • News & Views |

    Isolators with superior performance to existing devices can be designed by combining nonlinear resonators.

    • Harish Krishnaswamy
    • , Negar Reiskarimian
    •  & Aravind Nagulu
  • News & Views |

    Giant magnetoresistive devices fabricated on flexible substrates can detect the direction of strain in a material.

    • Jun-Yang Chen
    •  & Jian-Ping Wang
  • News & Views |

    The stacking of different two-dimensional materials can be used to create memristors with high thermal stability.

    • Quoc An Vu
    •  & Woo Jong Yu
  • News & Views |

    Neuromorphic computing based on fully memristive neural networks could offer a scalable and lower-cost alternative to existing neural spiking chips based solely on CMOS technology.

    • Bernabe Linares-Barranco

Reviews

  • Review Article |

    This Review Article examines the development of functional untethered soft robotics, evaluating recent advances in soft robotic actuation, sensing, and integration in relation to untethered systems.

    • Steven I. Rich
    • , Robert J. Wood
    •  & Carmel Majidi

Research

  • Article |

    Passive isolators that offer unitary transmission, infinite isolation and large non-reciprocal intensity range can be created by combining Fano and Lorentzian nonlinear resonators, separated by suitably designed delay lines.

    • Dimitrios L. Sounas
    • , Jason Soric
    •  & Andrea Alù
  • Article |

    The generation of a spin current by the anomalous Hall effect is observed by measuring the modulation in the ferromagnetic resonance linewidth of CoFeB/Cu/NiFe trilayer films.

    • Satoshi Iihama
    • , Tomohiro Taniguchi
    • , Kay Yakushiji
    • , Akio Fukushima
    • , Yoichi Shiota
    • , Sumito Tsunegi
    • , Ryo Hiramatsu
    • , Shinji Yuasa
    • , Yoshishige Suzuki
    •  & Hitoshi Kubota
  • Article |

    Memristors that offer good thermal stability, which is lacking in traditional memristors, can be created from a van der Waals heterostructure composed of graphene/MoS2–xO x /graphene.

    • Miao Wang
    • , Songhua Cai
    • , Chen Pan
    • , Chenyu Wang
    • , Xiaojuan Lian
    • , Ye Zhuo
    • , Kang Xu
    • , Tianjun Cao
    • , Xiaoqing Pan
    • , Baigeng Wang
    • , Shi-Jun Liang
    • , J. Joshua Yang
    • , Peng Wang
    •  & Feng Miao
  • Article |

    Leaky integrate-and-fire artificial neurons based on diffusive memristors enable unsupervised weight updates of drift-memristor synapses in an integrated convolutional neural network capable of pattern recognition.

    • Zhongrui Wang
    • , Saumil Joshi
    • , Sergey Savel’ev
    • , Wenhao Song
    • , Rivu Midya
    • , Yunning Li
    • , Mingyi Rao
    • , Peng Yan
    • , Shiva Asapu
    • , Ye Zhuo
    • , Hao Jiang
    • , Peng Lin
    • , Can Li
    • , Jung Ho Yoon
    • , Navnidhi K. Upadhyay
    • , Jiaming Zhang
    • , Miao Hu
    • , John Paul Strachan
    • , Mark Barnell
    • , Qing Wu
    • , Huaqiang Wu
    • , R. Stanley Williams
    • , Qiangfei Xia
    •  & J. Joshua Yang

Amendments & Corrections

Reverse Engineering

  • Reverse Engineering |

    Electronic devices today are untethered and always connected, and wireless networks have enabled this free flow of information. John O’Sullivan details the developments leading up to the establishment of the wireless network standard 802.11a, which is more commonly known as Wi-Fi.

    • John O’Sullivan