Now showing items 1-20 of 35

  • Beyond von-Neumann computing with nanoscale phase-change memory devices 

    Wright, CD; Hosseini, P; Vazquez-Diosdado, JA (Wiley, 2013-05-13)
    Historically, the application of phase-change materials and devices has been limited to the provision of non-volatile memories. Recently however the potential has been demonstrated for using phase-change devices as the ...
  • Calculating with light using a chip-scale all-optical abacus 

    Feldmann, J; Stegmaier, M; Gruhler, N; Ríos, C; Bhaskaran, H; Wright, CD; Pernice, WHP (Springer Nature, 2017-11-02)
    Machines that simultaneously process and store multistate data at one and the same location can provide a new class of fast, powerful and efficient general-purpose computers. We demonstrate the central element of an ...
  • Can conventional phase-change memory devices be scaled down to single-nanometre dimensions? 

    Hayat, H; Kohary, KI; Wright, CD (IOP Publishing: Hybrid Open Access, 2016-12-09)
    The scaling potential of “mushroom-type” phase-change memory devices is evaluated, down to singlenanometre dimensions, using physically realistic simulations that combine electro-thermal modelling with a Gillespie Cellular ...
  • Crystal-clear neuronal computing 

    Wright, CD (Nature Publishing Group, 2016-05-16)
    Induced progressive crystallization in chalcogenide-based materials can be used to closely mimic neuronal functions, opening new paths to neuromorphic computing.
  • The design of practicable phase-change metadevices for near-infrared absorber and modulator applications 

    Santiago García-Cuevas Carrillo; Geoffrey R. Nash; Hayat, HH; Martin J. Cryan; Maciej Klemm; Harish Bhaskaran; Wright, CD (Optical Society of America, 2015)
    Phase-change chalcogenide alloys, such as Ge2Sb2Te5 (GST), have very different optical properties in their amorphous and crystalline phases. The fact that such alloys can be switched, optically or electrically, between ...
  • Development of an optoelectronic test station for novel phasechange device characterisation and development 

    Au, YY; Wright, CD (E\PCOS, 2016-09-04)
    Optoelectronic applications of phase-change devices are of increasing interest and importance. To enable the proper experimental characterisation of device optoelectronic properties, and to allow for the future development ...
  • Experimental verification of increased optical contrast in nanometer phase change films 

    Hosseini, P; Bhaskaran, H; Wright, CD (Institute of Electrical and Electronics Engineers (IEEE), 2015-07-28)
    The optoelectronic properties of phase change materials (PCMs) have been recently demonstrated for novel applications such as solid state nanodisplays. The thickness of the active PCM layer in particular is of critical ...
  • Fast High-Responsivity Few-Layer MoTe2 Photodetectors 

    Octon, Tobias J.; Nagareddy, K; Russo, SR; Craciun, MC; Wright, CD (Wiley, 2016-08-16)
    The Transition Metal Dichalcogenide MoTe2 is fabricated via mechanical exfoliation into few-layer Field Effect Transistors (FETs) having a hole mobility of 2.04 V/cm2/s. Four-layer MoTe2 FETs show a high photoresponsivity ...
  • Implantation temperature effects on the nanoscale optical pattern fabrication in a-SiC:H films by Ga+ focused ion beams 

    Tsvetkova, T; Wright, CD; Hosseini, P; Bischoff, L; Zuk, J (Polish Academy of Sciences, 2013-05)
    This work is related to a novel approach of providing some new generation ultrastable (> 50 years), ultrahigh density (> 1 Tbit/sq.in.) data storage for archival applications. We used ion-implantation to write nanoscale ...
  • Integrated phase-change photonics for all-optical processing 

    Stegmaier, M; Fledmann, J; Rios, C; Wright, CD; Bhaskaran, H; Pernice, WHP (E\PCOS, 2016-09-04)
    Embedding phase-change materials (PCMs) in on-chip photonic circuitry enables nonvolatile alloptical operation of integrated optical devices. This hybrid system has been used so far in terms of memory applications. However, ...
  • Joule heating effects in nanoscale carbon-based memory devices 

    Bachmann, TA; Alexeev, AM; Koelmans, WW; Zipoli, F; Ott, AK; Dou, C; Ferrari, AC; Nagareddy, VK; Craciun, MF; Jonnalagadda, VP; Curioni, A; Sebastian, A; Eleftheriou, E; Wright, CD (Institute of Electrical and Electronics Engineers (IEEE), 2016-12-08)
    One of the emerging candidates to bridge the gap between fast but volatile DRAM and non-volatile but slow storage devices is tetrahedral amorphous carbon (ta-C) based memory [1]-[3]. This offers a very good scalability, ...
  • Memristive Effects in Oxygenated Amorphous Carbon Nanodevices 

    Bachmann, T; Koelmans, WW; Jonnalagadda, P; Le Gallo, M; Santini, C; Sebastian, A; Eleftheriou, E; Craciun, MF; Wright, CD (IOP Publishing, 2017-12-13)
    Computing with resistive-switching (memristive) memory devices has shown much recent progress and offers an attractive route to circumvent the von-Neumann bottleneck, i.e. the separation of processing and memory, which ...
  • Mixed-Mode Electro-Optical Operation of Ge2Sb2Te5 Nanoscale Crossbar Devices 

    Rodriguez-Hernandez, G; Hosseini, P; Ríos, C; Wright, CD; Bhaskaran, H (Wiley, 2017-06-05)
    The use of phase-change materials for a range of exciting new optoelectronic applications from artificial retinas to ultrahigh-resolution displays requires a thorough understanding of how these materials perform under a ...
  • Multilevel ultrafast flexible nanoscale nonvolatile hybrid graphene oxide-titanium oxide memories 

    Nagareddy, VK; Barnes, MD; Zipoli, F; Lai, KT; Alexeev, AM; Craciun, MF; Wright, CD (American Chemical Society, 2017-02-27)
    Graphene oxide (GO) resistive memories offer the promise of low-cost environmentally sustainable fabrication, high mechanical flexibility and high optical transparency, making them ideally suited to future flexible and ...
  • New routes to the functionalization patterning and manufacture of graphene-based materials for biomedical applications 

    De Sanctis, A; Russo, S; Craciun, MF; Alexeev, A; Barnes, MD; Nagareddy, V; Wright, CD (Royal Society, 2018-04-20)
    Graphene-based materials are being widely explored for a range of biomedical applications, from targeted drug delivery to biosensing, bioimaging and use for antibacterial treatments, to name but a few. In many such ...
  • Non-volatile Optoelectronic Phase-Change Meta-Displays 

    Garia-Ceuvas Carrillo, S; Wright, CD; Hosseini, P; Bhaskaran, H (metaconferences.org, 2016-07-25)
    Phase-change materials have a pronounced contrast between their electrical and optical properties when in the amorphous to crystalline phases, and can be switched between these phases quickly and repeatedly by electrical ...
  • Nonvolatile Reconfigurable Phase-Change Metadevices for Beam Steering in the Near Infrared 

    Ruiz De Galarreta, C; Alexeev, A; Bertolotti, J; Lopez-Garcia, M; Klemm, M; Cryan, MJ; Au, Y-Y; Wright, CD (Wiley, 2018-01-05)
    The development of flat, compact beam-steering devices with no bulky moving parts is opening up a new route to a variety of exciting applications, such as LIDAR scanning systems for autonomous vehicles, robotics and sensing, ...
  • Nonvolatile Reconfigurable Phase-Change Metadevices for Beam Steering in the Near Infrared 

    Ruiz De Galarreta, C; Alexeev, A; Bertolotti, J; Lopez-Garcia, M; Klemm, M; Cryan, MJ; Au, Y-Y; Wright, CD (Wiley, 2018-01-05)
    The development of flat, compact beam-steering devices with no bulky moving parts is opening up a new route to a variety of exciting applications, such as LIDAR scanning systems for autonomous vehicles, robotics and sensing, ...
  • On-chip photonic synapse 

    Cheng, Z; Ríos, C; Pernice, WHP; Wright, CD; Bhaskaran, H (American Association for the Advancement of Science, 2017-09-27)
    The search for new "neuromorphic computing" architectures that mimic the brain's approach to simultaneous processing and storage of information is intense. Because, in real brains, neuronal synapses outnumber neurons by ...