WIRELESS ENERGY TRANSFER

  • US 20080278264A1
  • Filed: 03/26/2008
  • Published: 11/13/2008
  • Est. Priority Date: 07/12/2005
  • Status: Active Grant
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First Claim
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1. An apparatus for use in wireless energy transfer, the apparatus comprising:

  • a first resonator structure configured for energy transfer with a second resonator structure, over a distance D larger than a characteristic size L1 of said first resonator structure and larger than a characteristic size L2 of said second resonator structure,wherein the energy transfer has a rate K and is mediated by evanescent-tail coupling of a resonant field of the first resonator structure and a resonant field of the second resonator structure, whereinsaid resonant field of the first resonator structure has a resonance angular frequency ω

    1, a resonance frequency-width Γ

    1, and a resonance quality factor Q1

    1/2Γ

    1 at least larger than 300, andsaid resonant field of the second resonator structure has a resonance angular frequency ω

    2, a resonance frequency-width Γ

    2, and a resonance quality factor Q2

    2/2Γ

    2 at least larger than 300,wherein the absolute value of the difference of said angular frequencies ω

    1 and ω

    2 is smaller than the broader of said resonant widths Γ

    1 and Γ

    2, and the quantity κ

    /√

    {square root over (Γ

    1Γ

    2)} is at least larger than 20.

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