Publications
372 results found
Syms RRA, Sydoruk O, Solymar L, 2013, Transmission-Line Model of Noisy Electromagnetic Media, IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, Vol: 61, Pages: 14-22, ISSN: 0018-9480
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- Citations: 7
Syms RRA, Young IR, Ahmad MM, et al., 2013, Endoscopically Compatible MR-safe Magneto-inductive Imaging Catheter, 2013 7TH INTERNATIONAL CONGRESS ON ADVANCED ELECTROMAGNETIC MATERIALS IN MICROWAVES AND OPTICS (METAMATERIALS 2013), Pages: 25-27
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- Citations: 4
Syms RRA, Floume T, 2013, Electric Coupling in Strongly-Coupled Magneto-Inductive Cable, 7th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), Publisher: IEEE, Pages: 148-150
Syms RRA, Young IR, Ahmad MM, et al., 2012, Magnetic resonance imaging using linear magneto-inductive waveguides, JOURNAL OF APPLIED PHYSICS, Vol: 112, ISSN: 0021-8979
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- Citations: 22
Sydoruk O, Syms RRA, Solymar L, 2012, Amplifying mirrors for terahertz plasmons, JOURNAL OF APPLIED PHYSICS, Vol: 112, ISSN: 0021-8979
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- Citations: 13
Tichem M, Syms RRA, 2012, Nanospray Dielectrophoresis, IEEE TRANSACTIONS ON NANOTECHNOLOGY, Vol: 11, Pages: 1259-1266, ISSN: 1536-125X
Syms RRA, Taylor-Robinson S, Ahmad MM, et al., 2012, Radiofrequency Detector Coils
A resonant radiofrequency (RF) detector assembly comprising a substrate, a coil formed on a front surface of the substrate, and two capacitors, each capacitor having a front plate which is formed on the front surface of the substrate and a rear plate formed on a rear surface of the substrate, the two front plates each being electrically connected to a different end of the coil, and the two rear plates being electrically connected to each other.
Syms RRA, Floume T, Young IR, et al., 2012, Parametric Amplification of Magnetic Resonance Images, IEEE SENSORS JOURNAL, Vol: 12, Pages: 1836-1845, ISSN: 1530-437X
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- Citations: 9
Syms RRA, Solymar L, 2012, Effective permeability of a metamaterial: Against conventional wisdom, APPLIED PHYSICS LETTERS, Vol: 100, ISSN: 0003-6951
A method for finding the effective permeability of metamaterials is presented, based on the interaction between electromagnetic and magnetoinductive waves. Assuming a coupled circuit model for the interaction, a dispersion equation is derived that exhibits two types of bandgaps, one leading to complex solutions and the other to purely evanescent waves. Although losses are disregarded, the effective permeability (in contrast to established theories) is shown to have an imaginary part in part of the stop band, while its real part remains finite in both the pass band and the stop band. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3696075]
Sydoruk O, Syms RRA, Solymar L, 2012, Distributed gain in plasmonic reflectors and its use for terahertz generation, Optics Express, Vol: 20, Pages: 19618-19627
Syms RRA, Floume T, Young IR, et al., 2012, Parametric amplification of magnetic resonance images, IEEE Sensors Journal, Vol: 12, Pages: 1836-1845
Tichem M, Syms RRA, 2012, Trapping and Patterning Nanoparticles from Spray, 12th IEEE International Conference on Nanotechnology (IEEE-NANO), Publisher: IEEE
Syms RRA, Sydoruk O, Solymar L, 2011, Lossy metamaterials: No effective medium properties without noise, PHYSICAL REVIEW B, Vol: 84, ISSN: 1098-0121
Lossy metamaterial elements act as sources of Johnson noise, making such materials inherently noisy. A coupled transmission line model capable of describing the effective medium properties, propagation and internal reflections, the internal noise distribution, and the noise factor is developed. Two analyses are provided, a numerical solution with limited physical insight and an approximation based on physical principles, and excellent agreement is obtained. It is shown that the internal noise spectrum is modified as it couples to the electromagnetic wave, and that there can be no change in permeability without an increase in the noise factor. This result implies that metamaterials will require careful evaluation of their noise performance before use in practical devices.
Malcolm A, Wright S, Syms RRA, et al., 2011, A miniature mass spectrometer for liquid chromatography applications, RAPID COMMUNICATIONS IN MASS SPECTROMETRY, Vol: 25, Pages: 3281-3288, ISSN: 0951-4198
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- Citations: 41
Choonee K, Syms RRA, 2011, Hydraulically actuated micro-contact printing engines, JOURNAL OF MICROMECHANICS AND MICROENGINEERING, Vol: 21, ISSN: 0960-1317
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- Citations: 3
Syms RRA, Segkhoonthod K, Young IR, 2011, Periodically structured thin-film cables, IET MICROWAVES ANTENNAS & PROPAGATION, Vol: 5, Pages: 1123-1129, ISSN: 1751-8725
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- Citations: 2
Syms RRA, Solymar L, 2011, Noise in metamaterials, JOURNAL OF APPLIED PHYSICS, Vol: 109, ISSN: 0021-8979
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- Citations: 23
Sydoruk O, Syms RRA, Solymar L, 2011, Terahertz plasma oscillations in Corbino field-effect transistors, CLEO/Europe and EQEC 2011
RRA S, Shamonina E, Solymar L, 2011, Near-field Image Transfer by Magneto-Inductive Arrays: a Modal Perspective, Metamaterials, Vol: 5, Pages: 8-25, ISSN: 1873-1988
A simple model of near-field pixel-to-pixel image transfer usingmagneto-inductive arrays is presented. The response of N-dimensionalrectangular arrays is first found as an excitation of eigenmodes. Thisanalytical method involves approximating the effect of sources and detectors,and replaces the problem of solving large numbers of simultaneous equationswith that of evaluating a sum. Expressions are given for the modal expansioncoefficients, and in the low-loss case it is shown that the coefficient valuesdepend only on the difference in reciprocal frequency space of the operatingfrequency from the resonant frequency of each mode. Analytic expressions arethen derived for quasi-optical quantities such as the spatial frequencyresponse, point-spread function and resolving power, and their implications forimaging fidelity and resolution are examined for arrays of different dimension.The results show clearly that there can be no useful image transfer for in-bandexcitation. Out-of-band excitation allows image transfer. Provided the array islarger than the expected image by at least the size of the point spreadfunction, the effect of the array boundaries may be ignored and imaging isdetermined purely by the properties of the medium. However, there is a tradeoffbetween fidelity and throughput, and good imaging performance using thick slabsdepends on careful choice of the operating frequency. The approximate analyticmethod is verified by comparison of exact numerical solution.
Syms RRA, 2011, High performance microfabricated electrostatic quadrupole lens, US 7,893,407
Syms RRA, Solymar L, 2011, Magneto-inductive cable arrays: Estimation and reduction of crosstalk, JOURNAL OF APPLIED PHYSICS, Vol: 109, ISSN: 0021-8979
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- Citations: 3
Rao J, Zou H, Syms RRA, et al., 2011, Fabrication of 2D silicon nano-mold based on sidewall transfer, MICRO & NANO LETTERS, Vol: 6, Pages: 29-33, ISSN: 1750-0443
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- Citations: 14
Syms RRA, Solymar L, 2011, Noise waves in electrical lattices, 5th Int. Cong. on Advanced Electromagnetic Materials in Microwaves and Optics
Sydoruk O, Syms RRA, Solymar L, 2011, Terahertz plasma oscillations in Corbino field-effect transistors, CLEO/Europe-EQEC '11
Syms RRA, 2011, Magneto-inductive Mach-Zehnder interferometer, Moscow International Symposium on Magnetism (MISM2011)
Syms RRA, Shamonina E, Solymar L, 2011, Near-field image transfer by magneto-inductive arrays: a modal perspective, Metamaterials, Vol: 5, Pages: 8-25
Syms RRA, Solymar L, 2011, Magneto-inductive phase shifters and interferometers, Metamaterials, Vol: 5, Pages: 155-161
Syms RRA, Floume T, 2011, Efficiency limit of long-distance magneto-inductive power transfer, 5th Int. Cong. on Advanced Electromagnetic Materials in Microwaves and Optics
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