Dresden 2006 – scientific programme
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HL: Halbleiterphysik
HL 4: New materials
HL 4.5: Talk
Monday, March 27, 2006, 11:15–11:30, BEY 154
Parametric Amplification of Magnetoinductive Waves in Bi-periodic Metamaterial Arrays — •Oleksiy Sydoruk1, Oleksandr Zhuromskyy1, Ekaterina Shamonina1, and Laszlo Solymar2 — 1Department of Physics, University of Osnabrück,Osnabrück, Germany — 2Department of Electrical and Electronic Engineering,Imperial College, London, United Kingdom
One of the promising fields of applications of Magnetoinductive Waves [1,2] is in Magnetic Resonance Imaging, where they can provide an elegant and effective solution for signal guiding [3] and detection [4]. Since the human body is a significant source of noise an improvement in the signal-to-noise ratio is always desirable. Amplification of the signal at an early stage in the receiving system (which in the case of a magnetoinductive receiver is a set of magnetically coupled resonators) will allow both noise reduction and compensation for ohmic losses.
Parametric amplification is an obvious candidate for investigations. It was suggested [5] that bi-periodic arrays of metamaterial elements can provide an environment where exact phase matching conditions for parametric amplification may be fulfilled. Here we present a theory of parametric amplification in bi-periodic metamaterial arrays with the required nonlinearity realized by varactor insertions.
[1] E. Shamonina, et. al, Electron. Lett. 38, 371-373 (2002).
[2] E. Shamonina, et. al, J. Appl. Phys. 92, 6252-6261 (2002).
[3] E. Shamonina and L. Solymar, J. Phys. D 37, 362-367 (2004).
[4] L. Solymar, et. al, submitted to J. Appl. Phys.
[5] O. Sydoruk, et. al, Appl. Phys. Lett. 87, 072501-1-3 (2005).