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US 7,825,543 B2Granted
Wireless energy transfer
AssigneeMassachusetts Institute of Technology
InventorsAristeidis Karalis, Andre B. Kurs, Robert Moffatt, John D. Joannopoulos, Peter H. Fisher, Marin Soljacic
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Abstract
Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured to transfer energy non-radiatively with a second resonator structure over a distance greater than a characteristic size of the second resonator structure. The non-radiative energy transfer is mediated by a coupling of a resonant field evanescent tail of the first resonator structure and a resonant field evanescent tail of the second resonator structure.
Claims79
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 or larger than a characteristic size L2 of said second resonator structure,
- wherein the energy transfer has a rate κ 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, wherein
- said resonant field of the first resonator structure has a resonance angular frequency ω1, a resonance frequency-width Γ1, and a resonance quality factor Q1=ω1/2Γ1 at least larger than 100, and
- said resonant field of the second resonator structure has a resonance angular frequency ω2, a resonance frequency-width Γ2 , and a resonance quality factor Q2 =ω2/2Γ2 at least larger than 100,
- wherein the absolute value of the difference of said angular frequencies ω1 and ω2 is smaller than the broader of said resonant widths Γ1, and Γ2.
2 more elements
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 thickness T1 of said first resonator structure or larger than a characteristic size L2 of said second resonator structure,
- wherein the energy transfer has a rate κ 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, wherein
- said resonant field of the first resonator structure has a resonance angular frequency ω1, a resonance frequency-width Γ1, and a resonance quality factor Q1=ω1/2Γ1 at least larger than 100, and
- said resonant field of the second resonator structure has a resonance angular frequency ω2, a resonance frequency-width Γ2, and a resonance quality factor Q2=ω2/2Γ2 at least larger than 100,
- wherein the absolute value of the difference of said angular frequencies ω1 and ω2 is smaller than the broader of said resonant widths Γ1 and Γ2.
2 more elements
A method for wireless energy transfer, the method comprising:
- providing a first resonator structure and transferring energy with a second resonator structure, over a distance D larger than a characteristic size L1 of said first resonator structure or larger than a characteristic size L2 of said second resonator structure,
- wherein the energy transfer has a rate κ 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, wherein
- said resonant field of the first resonator structure has a resonance angular frequency ω1, a resonance frequency-width Γ1, and a resonance quality factor Q1=ω1/2Γ1 at least larger than 100, and
- said resonant field of the second resonator structure has a resonance angular frequency ω2, a resonance frequency-width Γ2, and a resonance quality factor Q2=ω2/2Γ2 at least larger than 100,
- wherein the absolute value of the difference of said angular frequencies ω1 and ω2 is smaller than the broader of said resonant widths Γ1 and Γ2.
2 more elements
A method for wireless energy transfer, the method comprising:
- providing a first resonator structure and transferring energy with a second resonator structure, over a distance D larger than a characteristic thickness T1 of said first resonator structure or larger than a characteristic size L2 of said second resonator structure,
- wherein the energy transfer has a rate κ 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, wherein
- said resonant field of the first resonator structure has a resonance angular frequency ω1, a resonance frequency-width Γ1, and a resonance quality factor Q1=ω1/2Γ1 at least larger than 100, and
- said resonant field of the second resonator structure has a resonance angular frequency ω2, a resonance frequency-width Γ2 , and a resonance quality factor Q2=ω2/2Γ2 at least larger than 100,
- wherein the absolute value of the difference of said angular frequencies ω1 and ω2 is smaller than the broader of said resonant widths Γ1 and Γ2.
2 more elements
Dependencies are inferred from the claim text.