Microwave power generation by magnetic superlattices

Samuel Littlejohn; Alain Nogaret; Steven R Davies; M Henini; H E Beere; D A Ritchie

doi:10.1063/1.3670400

Microwave power generation by magnetic superlattices

Samuel Littlejohn, Alain Nogaret, Steven R Davies, M Henini, H E Beere, D A Ritchie

Department of Physics

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Abstract

We report on microwave power emission by ballistic electrons as they cross a region of spatially inhomogeneous magnetic field. Magnetic finger gates were fabricated at the surface of high mobility GaAs/AlGaAs Hall bars embedded in a coplanar waveguide. By modulating the current injected through the Hall bar and measuring the second harmonic of the signal rectified by a Schottky detector, we obtain the microwave power emitted by the superlattice. This power (~6W.m-2) is compared to the fluorescence of electron spins that undergo spin resonance as they cross domains of opposite magnetic field.

Original language	English
Article number	242107
Number of pages	3
Journal	Applied Physics Letters
Volume	99
Issue number	24
DOIs	https://doi.org/10.1063/1.3670400
Publication status	Published - 12 Dec 2011

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Nogaret_APL_2011_99_242107.pdf
Copyright (2011) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Littlejohn, S., Nogaret, A., Davies, S. R., Henini, M., Beere, H. E. and Ritchie, D. A., 2011. Microwave power generation by magnetic superlattices. Applied Physics Letters, 99 (24), 242107 and may be found at http://apl.aip.org/
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abstract = "We report on microwave power emission by ballistic electrons as they cross a region of spatially inhomogeneous magnetic field. Magnetic finger gates were fabricated at the surface of high mobility GaAs/AlGaAs Hall bars embedded in a coplanar waveguide. By modulating the current injected through the Hall bar and measuring the second harmonic of the signal rectified by a Schottky detector, we obtain the microwave power emitted by the superlattice. This power (\textasciitilde{}6W.m-2) is compared to the fluorescence of electron spins that undergo spin resonance as they cross domains of opposite magnetic field.",

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AU - Littlejohn, Samuel

AU - Nogaret, Alain

AU - Davies, Steven R

AU - Henini, M

AU - Beere, H E

AU - Ritchie, D A

PY - 2011/12/12

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N2 - We report on microwave power emission by ballistic electrons as they cross a region of spatially inhomogeneous magnetic field. Magnetic finger gates were fabricated at the surface of high mobility GaAs/AlGaAs Hall bars embedded in a coplanar waveguide. By modulating the current injected through the Hall bar and measuring the second harmonic of the signal rectified by a Schottky detector, we obtain the microwave power emitted by the superlattice. This power (~6W.m-2) is compared to the fluorescence of electron spins that undergo spin resonance as they cross domains of opposite magnetic field.

AB - We report on microwave power emission by ballistic electrons as they cross a region of spatially inhomogeneous magnetic field. Magnetic finger gates were fabricated at the surface of high mobility GaAs/AlGaAs Hall bars embedded in a coplanar waveguide. By modulating the current injected through the Hall bar and measuring the second harmonic of the signal rectified by a Schottky detector, we obtain the microwave power emitted by the superlattice. This power (~6W.m-2) is compared to the fluorescence of electron spins that undergo spin resonance as they cross domains of opposite magnetic field.

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JO - Applied Physics Letters

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ER -

Microwave power generation by magnetic superlattices

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