Optical techniques

  • Article |

    Measuring three-dimensional dielectric tensors is desired for applications in material and soft matter physics. Here, the authors use a tomographic approach and inversely solve the vectorial wave equation to directly reconstruct dielectric tensors of anisotropic structures.

    • Seungwoo Shin
    • , Jonghee Eun
    •  & YongKeun Park
  • Article |

    A pump–push–probe time-resolved technique is developed to characterize the dynamics of photoexcitations at buried, disordered interfaces. Applied to organic bulk heterojunctions, the method provides insight on charge separation in photovoltaic films.

    • Andreas C. Jakowetz
    • , Marcus L. Böhm
    •  & Richard H. Friend
  • Article |

    A large-area fabrication approach to achieve three-dimensional architectured metamaterials, with structural features spanning seven orders of magnitude, results in advanced mechanical properties, including high elasticity.

    • Xiaoyu Zheng
    • , William Smith
    •  & Christopher M. Spadaccini
  • Article |

    Applying an external magnetic field to cuprous oxide causes the energy spacings in the exciton spectrum to transition from a Poissonian distribution to one governed by the Gaussian unitary ensemble statistics, revealing a signature of quantum chaos.

    • Marc Aßmann
    • , Johannes Thewes
    •  & Manfred Bayer
  • Article |

    A renally cleared, water-soluble dye emitting in the near-infrared-imaging (NIR)-II window outperforms a clinically approved NIR-I dye in the in vivo imaging of tumours and their nearby blood and lymphatic vasculatures.

    • Alexander L. Antaris
    • , Hao Chen
    •  & Hongjie Dai
  • Letter |

    A highly selective and efficient approach to covalently bond complementary DNA strands in solution and on surfaces on demand is shown. The approach involves the substitution of a pair of complementary bases by cinnamate-based crosslinks, which can be activated on exposure to ultraviolet light, and allows chemical patterning of flat and curved surfaces down to micrometre and potentially submicrometre resolutions.

    • Lang Feng
    • , Joy Romulus
    •  & Paul Chaikin