Structures, systems and methods for harvesting energy from electromagnetic radiation

• US 8,071,931 B2
• Filed: 11/13/2007
• Issued: 12/06/2011
• Est. Priority Date: 11/13/2007
• Status: Expired due to Fees

• Current Assignee: Battelle Energy Alliance LLC (Battelle Memorial Institute)
• Original Assignee: Battelle Energy Alliance LLC (Battelle Memorial Institute)
• Inventors: Novack, Steven D., Kotter, Dale K., Pinhero, Patrick J.
• Primary Examiner(s): Ko, Tony
• Application Number:
  US11/939,342
• Publication Number:
  US 20100284086A1
• Time in Patent Office: 1,484 Days
• Field of Search: 250/208.2, 343/909
• US Class Current: 250/208.2
• CPC Class Codes: H01Q 1/248 provided with an AC/DC converting device, e.g. rectennas
• CPC Class Codes: H01Q 21/061 Two dimensional planar arrays
• CPC Class Codes: H02S 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

Methods, devices and systems for harvesting energy from electromagnetic radiation are provided including harvesting energy from electromagnetic radiation. In one embodiment, a device includes a substrate and one or more resonance elements disposed in or on the substrate. The resonance elements are configured to have a resonant frequency, for example, in at least one of the infrared, near-infrared and visible light spectra. A layer of conductive material may be disposed over a portion of the substrate to form a ground plane. An optical resonance gap or stand-off layer may be formed between the resonance elements and the ground plane. The optical resonance gap extends a distance between the resonance elements and the layer of conductive material approximately one-quarter wavelength of a wavelength of the at least one resonance element'"'"'s resonant frequency. At least one energy transfer element may be associated with the at least one resonance element.

Claims

1. An energy harvesting device, comprising:

a substrate;

at least one resonance element associated with the substrate, the at least one resonance element configured to have a resonant frequency between approximately 20 THz and approximately 1,000 THz;

a layer of conductive material over a surface of the substrate;

an optical resonance gap extending a distance between the at least one resonance element and the layer of conductive material of approximately one-quarter wavelength of a wavelength of the at least one resonance element'"'"'s resonant frequency; and

at least one energy transfer element associated with the at least one resonance element.

2. The energy harvesting device of claim 1, wherein the at least one resonance element comprises a plurality of resonance elements configured in an array.

3. The energy harvesting device of claim 2, further comprising a plurality of cavities, each cavity of the plurality being positioned between the layer of conductive material and at an associated one of the plurality of resonance elements.

4. The energy harvesting device of claim 3, further comprising a dielectric material disposed in each cavity of the plurality.

5. The energy harvesting device of claim 3, wherein the at least one energy transfer element comprises at least one capacitor structure.

6. The energy harvesting device of claim 5, wherein the at least one capacitor structure comprises a capacitor structure formed in each of the plurality of cavities.

7. The energy harvesting apparatus of claim 5, wherein the at least one capacitor structure comprises a carbon nanotube structure disposed in at least one of the plurality of cavities.

8. The energy harvesting device of claim 2, wherein the plurality of resonance elements comprises at least one resonance element exhibiting a first configuration and at least a second resonance element exhibiting a second configuration, the second configuration differing from the first configuration.

9. The energy harvesting device of claim 8, wherein the first configuration comprises a first size, and wherein the second configuration comprises a second size.

10. The energy harvesting device of claim 8, wherein the first configuration comprises a first geometry and the second configuration comprises a second geometry.

11. The energy harvesting device of claim 1, wherein the at least one resonance element is formed of a material having a conductivity between approximately 1.0×

10⁶ Ohms<sup>−

1</sup>-cm<sup>−

1</sup> and approximately 106.0×

10⁶ Ohms <sup>−

1</sup>-cm<sup>−

1</sup>.

12. The energy harvesting device of claim 11, wherein the layer of conductive material exhibits a conductivity between approximately 40.0×

10⁶ Ohms<sup>−

1</sup>-cm<sup>−

1</sup> and approximately 106.0×

10⁶ Ohms<sup>−

1</sup>-cm<sup>−

1</sup>.

13. The energy harvesting device of claim 1, wherein the layer of conductive material exhibits an optical reflectivity of approximately 95% at the resonant frequency of the at least one resonance element.

14. The energy harvesting device of claim 1, wherein the substrate comprises at least one of a polyethylene, a polypropylene, an acrylic, a fluoropolymer, a polystyrene, poly methylmethacrylate (PMMA), polyethylene terephthalate, apolyimide, and a polyolefin.

15. The energy harvesting device of claim 1, wherein the at least one resonance element associated with the substrate comprises a protruding element extending approximately 1 gm to approximately 2 μ

m from a surface of the substrate.

16. The energy harvesting device of claim 1, wherein the at least one resonance element associated with the substrate comprises a protruding element having a width of from approximately 100 nm to approximately 400 nm.

17. The energy harvesting device of claim 1, wherein the at least one resonance element associated with the substrate comprises a conductive material selected from the group consisting of manganese, gold, silver, copper, aluminum, platinum, nickel, iron, lead, and tin.

18. A method of harvesting energy, the method comprising:

providing at least one resonance element formed of an electrically conductive material and having a resonant frequency between approximately 20 THz and approximately 1,000 THz;

exposing the at least one resonance element to electromagnetic radiation having a frequency substantially the same as the resonant frequency;

absorbing at least a first portion of the electromagnetic radiation with the at least one resonance element;

reflecting at least a second portion of the electromagnetic radiation off of a defined surface;

absorbing at least a portion of the at least a second portion of the electromagnetic radiation with the at least one resonance element; and

transferring alternating current (AC) induced energy from the at least one resonance element via at least one energy transfer element.

19. The method according to claim 18, further comprising configuring an optical resonance gap extending a distance between the at least one resonance element and the defined distance a quarter wavelength of a wavelength associated with the resonant frequency of the at least one resonance element.

20. The method according to claim 18, further comprising configuring the at least one resonance element to exhibit a conductivity between approximately 1.0×

10⁶-Ohms<sup>−

1</sup>−

cm<sup>−

1</sup> and approximately 106.0×

10⁶ Ohms<sup>−

1</sup>−

cm<sup>—

1</sup>.

21. The method according to claim 18, wherein reflecting at least a second portion of the electromagnetic radiation off of a defined surface comprises reflecting the at least a second portion of the electromagnetic radiation off of a ground plane, and wherein the method further comprises configuring the ground plane to exhibit a conductivity between approximately 40.0×

10⁶ -Ohms<sup>−

1</sup>−

cm<sup>−

1</sup> and approximately 106.0×

10⁶-Ohms<sup>−

1</sup>-cm<sup>−

1</sup> and an optical reflectivity of approximately 95% at the resonant frequency of the at least one resonance element.

22. The method according to claim 18, wherein providing at least one resonance element comprises providing a first plurality of resonance elements each having substantially the same resonance frequency and providing a second plurality of resonance elements each having a resonant frequency at a different frequency than the resonant frequency of the first plurality of resonance elements and between approximately 20 THz and approximately 1,000 THz, and further comprising exposing the second plurality of resonance elements to electromagnetic radiation having a frequency substantially the same as the resonant frequency of the second plurality of resonance elements.

23. A method of harvesting energy;

providing at least one resonance element formed of an electrically conductive material;

exposing the at least one resonance element to electromagnetic radiation radiated from the earth;

inducing resonance in the at least one resonance element to produce AC (alternating current) energy; and

transferring AC induced energy from the at least one resonance element via at least one energy transfer element.