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Magnetic field generator

  • US 8,780,677 B2
  • Filed: 01/03/2013
  • Issued: 07/15/2014
  • Est. Priority Date: 01/06/2012
  • Status: Expired due to Fees
First Claim
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1. A device for generating a magnetic field, comprising:

  • a light source operable to generate pulses of light of a particular wavelength, the light having an oscillating electromagnetic field with a defined polarization; and

    a magnetic field generator arranged to receive the light and comprising a closed current path made of first and second angular arc portions of first and second materials interconnected by first and second junctions;

    the closed current path comprising electrons or holes which absorb energy from each pulse of light and are thereby transiently heated; and

    the polarization of the light being aligned relative to the closed current path so that each pulse of light causes different amounts of transient heating of the electrons or holes at the first and second junctions so that one of the junctions becomes hotter than the other, which causes a thermally induced transient current to flow around the closed current path, thereby generating a transient magnetic field.

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