摘要:
Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is κ1B, transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is κB2, and during the wireless energy transfers, adjusting at least one of the coupling rates κ1B and κB2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.
摘要:
Described herein are embodiments of at least one source resonator coupled to an energy source generating an oscillating near field region, and at least one device resonator optionally coupled to an electronic device located at a variable distance within the at least one source resonator's near-field region, where at least two of the resonators comprise high-Q capacitively-loaded conducting-wire loops.
摘要:
Described herein are embodiments of a source high-Q resonator, optionally coupled to an energy source, a second source high-Q resonator, optionally coupled to an energy source, and a third high-Q resonator, optionally coupled to an energy drain, where at least one of the source resonators and the third resonator may be coupled to transfer electromagnetic energy from at least one of the said source resonators to said third resonator.
摘要:
Described herein are embodiments of transmitting power wirelessly that includes driving a high-Q non-radiative resonator at a value near its resonant frequency to produce a magnetic field output, said non-radiative-resonator formed of a combination of resonant parts, including at least an inductive part formed by a wire loop, and a capacitor part that is separate from a material forming the inductive part, and maintaining at least one characteristic of said resonator such that its usable range has a usable distance over which power can be received, which distance is set by a detuning effect when a metallic structure gets too close to said resonator.
摘要:
Described herein are embodiments of a first resonator with a quality factor, Q1, greater than 100, coupled to an energy source, generating an oscillating near field region, and a second resonator, with a quality factor, Q2, greater than 100, optionally coupled to an energy drain, and moving freely within the near field region of the first resonator. The first resonator and the second resonator may be coupled to transfer electromagnetic energy from said first resonator to said second resonator as the second resonator moves freely within the near field region.
摘要:
The electromagnetic energy transfer device includes a first resonator structure receiving energy from an external power supply. The first resonator structure has a first Q-factor. A second resonator structure is positioned distal from the first resonator structure, and supplies useful working power to an external load. The second resonator structure has a second Q-factor. The distance between the two resonators can be larger than the characteristic size of each resonator. Non-radiative energy transfer between the first resonator structure and the second resonator structure is mediated through coupling of their resonant-field evanescent tails.
摘要:
Described herein are embodiments of transferring electromagnetic energy that includes providing a first electromagnetic resonator structure receiving energy from an external power supply, said first resonator structure having a first mode with a resonant frequency ω1, an intrinsic loss rate Γ1, and a first Q-factor Q1=ω1/(2Γ1), providing a second electromagnetic resonator structure being positioned distal from said first resonator structure and not electrically wired to the first resonator structure, said second resonator structure having a second mode with a resonant frequency ω2, an intrinsic loss rate Γ2, and a second Q-factor Q2=ω2/(2Γ2), and transferring electromagnetic energy from said first resonator structure to said second resonator structure over a distance D that may be smaller than each of the resonant wavelengths λ1 and λ2 corresponding to the resonant frequencies ω1 and ω2, respectively. The electromagnetic resonator structures may be designed to have Q1>100 and Q2>100. The absolute value of the difference of said angular frequencies ω1 and ω2 may be smaller than the magnitude of the coupling rate, κ.
摘要:
There is provided a structure for supporting propagation of surface plasmon polaritons. The structure includes a plasmonic material region and a dielectric material region, disposed adjacent to a selected surface of the plasmonic material region. At least one of the plasmonic material region and the dielectric material region have a dielectric permittivity distribution that is specified as a function of depth through the corresponding material region. This dielectric permittivity distribution is selected to impose prespecified group velocities, vgj, on a dispersion relation for a surface polaritonic mode of the structure for at least one of a corresponding set of prespecified frequencies, ωj, and corresponding set of prespecified wavevectors, kj, where j=1 to N.
摘要:
The electromagnetic energy transfer device includes a first resonator structure receiving energy from an external power supply. The first resonator structure has a first Q-factor. A second resonator structure is positioned distal from the first resonator structure, and supplies useful working power to an external load. The second resonator structure has a second Q-factor. The distance between the two resonators can be larger than the characteristic size of each resonator. Non-radiative energy transfer between the first resonator structure and the second resonator structure is mediated through coupling of their resonant-field evanescent tails.
摘要:
Transparent displays enable many useful applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light. Exemplary transparent scattering displays can be simple, inexpensive, scalable to large sizes, viewable over wide angular ranges, energy efficient, and transparent simultaneously.