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Author (up) Freer, Erik M.; Grachev, Oleg; Duan, Xiangfeng; Martin, Samuel; Stumbo, David P.
Title High-yield self-limiting single-nanowire assembly with dielectrophoresis Type Journal Article
Year 2010 Publication Nature Nanotechnology Abbreviated Journal Nat. Nanotech.
Volume 5 Issue 7 Pages 525–530
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Abstract Single-crystal nanowire transistors and other nanowire-based devices could have applications in large-area and flexible electronics if conventional top-down fabrication techniques can be integrated with high-precision bottom-up nanowire assembly. Here, we extend dielectrophoretic nanowire assembly to achieve a 98.5% yield of single nanowires assembled over 16,000 patterned electrode sites with submicrometre alignment precision. The balancing of surface, hydrodynamic and dielectrophoretic forces makes the self-assembly process controllable, and a hydrodynamic force component makes it self-limiting. Our approach represents a methodology to quantify nanowire assembly, and makes single nanowire assembly possible over an area limited only by the ability to reproduce process conditions uniformly.
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Notes SSPD Approved no
Call Number RPLAB @ gujma @ Serial 683
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Author (up) Fu, K.; Zannoni, R.; Chan, C.; Adams, S. H.; Nicholson, J.; Polizzi, E.; Yngvesson, K. S.
Title Terahertz detection in single wall carbon nanotubes Type Journal Article
Year 2008 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume 92 Issue 3 Pages 033105
Keywords HEB, single wall, carbon nanotube, CNT, SWNT, SWCNT, terahertz detection, THz
Abstract It is reported that terahertz radiation from 0.69 to 2.54 THz has been sensitively detected in a device consisting of bundles of carbon nanotubes containing single wall metallic carbon nanotubes, quasioptically coupled through a lithographically fabricated antenna, and a silicon lens. The measured data are consistent with a bolometric detection process in the metallic tubes and the devices show promise for operation well above 4.2 K.
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ISSN 0003-6951 ISBN Medium
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Notes NEP is not shown Approved no
Call Number Serial 566
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Author (up) Fuchs, G. D.; Burkard, G.; Klimov, P. V.; Awschalom, D. D.
Title A quantum memory intrinsic to single nitrogen–vacancy centres in diamond Type Journal Article
Year 2011 Publication Nature Physics Abbreviated Journal Nat. Phys.
Volume 7 Issue 10 Pages 789-793
Keywords fromIPMRAS
Abstract A quantum memory, composed of a long-lived qubit coupled to each processing qubit, is important to building a scalable platform for quantum information science. These two qubits should be connected by a fast and high-fidelity operation to store and retrieve coherent quantum states. Here, we demonstrate a room-temperature quantum memory based on the spin of the nitrogen nucleus intrinsic to each nitrogen–vacancy (NV) centre in diamond. We perform coherent storage of a single NV centre electronic spin in a single nitrogen nuclear spin using Landau–Zener transitions across a hyperfine-mediated avoided level crossing. By working outside the asymptotic regime, we demonstrate coherent state transfer in as little as 120 ns with total storage fidelity of 88±6%. This work demonstrates the use of a quantum memory that is compatible with scaling as the nitrogen nucleus is deterministically present in each NV centre defect.
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Call Number RPLAB @ gujma @ Serial 823
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Author (up) Gabay, Marc; Triscone, Jean-Marc
Title Superconductors: Terahertz superconducting switch Type Journal Article
Year 2011 Publication Nature Photonics Abbreviated Journal Nat. Photon.
Volume 5 Issue 8 Pages 447-449
Keywords fromIPMRAS
Abstract The use of terahertz pulses to 'gate' interlayer charge transport in a superconductor could lead to a variety of new and interesting applications.
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Call Number RPLAB @ gujma @ Serial 777
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Author (up) Gaggero, A.; Nejad, S. Jahanmiri; Marsili, F.; Mattioli, F.; Leoni, R.; Bitauld, D.; Sahin, D.; Hamhuis, G. J.; Nötzel, R.; Sanjines, R.; Fiore, A.
Title Nanowire superconducting single-photon detectors on GaAs for integrated quantum photonic applications Type Journal Article
Year 2010 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume 97 Issue 15 Pages 3
Keywords SSPD
Abstract We demonstrate efficient nanowire superconducting single photon detectors (SSPDs) based on NbN thin films grown on GaAs. NbN films ranging from 3 to 5 nm in thickness have been deposited by dc magnetron sputtering on GaAs substrates at 350 °C. These films show superconducting properties comparable to similar films grown on sapphire and MgO. In order to demonstrate the potential for monolithic integration, SSPDs were fabricated and measured on GaAs/AlAs Bragg mirrors, showing a clear cavity enhancement, with a peak quantum efficiency of 18.3% at λ = 1300 nm and T = 4.2 K.
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Call Number RPLAB @ gujma @ Serial 681
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