Wireless non-radiative energy transfer

  • US 20070222542A1
  • Filed: 07/05/2006
  • Published: 09/27/2007
  • Est. Priority Date: 07/12/2005
  • Status: Active Grant
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First Claim
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1. A method of transferring energy comprising:

  • providing a first resonator structure receiving energy from an external power supply, said first resonator structure having a first resonant frequency ω

    1, and a first Q-factor Q1, and characteristic size L1, and providing a second resonator structure being positioned distal from said first resonator structure, at closest distance D, said second resonator structure having a second resonant frequency ω

    2, and a second Q-factor Q2, and characteristic size L2 wherein the two said frequencies ω

    1 and ω

    2 are close to within the narrower of the two resonance widths r1, and r2, transferring energy non-radiatively between said first resonator structure and said second resonator structure, said energy transfer being mediated through coupling of their resonant-field evanescent tails, and the rate of energy transfer between said first resonator and said second resonator being denoted by κ

    , wherein non-radiative means D is smaller than each of the resonant wavelengths λ

    1 and λ

    2, wherein c is the propagation speed of radiation in the surrounding medium.

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