Now showing items 1-5 of 5

    • Antireflective Transparent Oleophobic Surface by Non-Interacting Cavities 

      Rombaut, Juan; Abraham Maniyara, Rinu; Bellman, Robert A.; Acquard, Daniel F.; Baca, Adra S.; Osmond, Johann; Senaratne, Wageesha; Quesada, Mark Alejandro; Baker, David; Mazumder, Prantik; Pruneri, Valerio (ACS, 2018-11-16)
      Article
      Open Access
      Oleophobic surfaces have been so far realized using complex micro-scale and nano-scale reentrant geometries where primary and secondary structures or overhang geometries are typically required. Here we propose a new ...
    • Electrically Driven Varifocal Silicon Metalens 

      Afridi, Adeel; Canet-Ferrer, Josep; Philippet, Laurent; Osmond, Johann; Berto, Pascal; Quidant, Romain (ACS, 2018-10-08)
      Article
      Open Access
      Optical metasurfaces have shown to be a powerful approach to planar optical elements, enabling an unprecedented control over light phase and amplitude. At that stage, where a wide variety of static functionalities have ...
    • Formamidinium Incorporation into Compact Lead Iodide for Low Band Gap Perovskite Solar Cells with Open-Circuit Voltage Approaching the Radiative Limit 

      Zhang, Hui; Kramarenko, Mariia; Martínez-Denegri Sánchez, Guillermo; Osmond, Johann; Martorell Pena, Jordi (2019-03-06)
      Article
      Open Access
      To bring hybrid lead halide perovskite solar cells toward the Shockley-Queisser limit requires lowering the band gap while simultaneously increasing the open-circuit voltage. This, to some extent divergent objective, may ...
    • Long-lived spin coherence of indirect excitons in GaAs coupled quantum wells 

      Beian, Mussie; Alloing, Mathieu; Cambril, Edmond; Gomez Carbonell, Carmen; Osmond, Johann; Lemaître, Aristide; Dubin, François (IOP, 2015-04-30)
      Article
      Open Access
      We study spatially indirect excitons confined in a symmetric GaAs double quantum well. We show that the spin polarisation of very dilute gases can be optically imprinted, in both pure and superposition states. In the regime ...
    • Time-domain separation of optical properties from structural transitions in resonantly bonded materials 

      Waldecker, Lutz; Miller, Timothy A.; Rudé, Miquel; Bertoni, Roman; Osmond, Johann; Simpson, Robert E.; Ernstorfer, Ralph; Wall, Simon (Nature Publishing Group, 2015-07-27)
      Article
      Open Access
      The extreme electro-optical contrast between crystalline and amorphous states in phase-change materials is routinely exploited in optical data storage1 and future applications include universal memories2, flexible displays3, ...