Abstract:
A superconducting integrated circuit includes at least one superconducting resonator, including a substrate, a conductive layer disposed over a surface of the substrate with the conductive layer including at least one conductive material including a substantially low stress polycrystalline Titanium Nitride (TiN) material having an internal stress less than about two hundred fifty MPa (magnitude) such that the at least one superconducting resonator and/or qubit (hereafter called "device") is provided as a substantially high quality factor, low loss superconducting device.
Abstract:
A device includes a substrate, a pedestal extending from the substrate, and a ring resonator disposed on the pedestal above the substrate. The ring resonator has a resonance wavelength greater than 1.5 μm and includes at least one of silicon and chalcogenide glass. The device can be used as a ring resonator sensor or a light source. The ring resonator is substantially transparent to mid-infrared radiation to reduce optical losses. The pedestal has a narrower width compared to the ring resonator to generate improved interaction between evanescent fields of light in the ring resonator and analytes nearby the ring resonator, thereby increasing sensing sensitivity. In addition, fabrication of the device is compatible with complementary metal-oxide-semiconductor (CMOS) processes and hence is amenable to large scale manufacturing.
Abstract:
A method and apparatus of fabrication of a multilayer flexible metamaterial can be fabricated using flip chip transfer (FCT) technique. This technique is different from other similar techniques such as metal lift off process, which fabricates the nanostructures directly onto the flexible substrate or nanometer printing technique. It is a solution-free FCT technique using double-side optical adhesive as the intermediate transfer layer and a tri-layer metamaterial nanostructures on a rigid substrate can be transferred onto adhesive first. Another embodiment of the present invention is the fabrication method and apparatus that allows the transfer of the metamaterial from a rigid substrate such as glass, quartz and metals onto a flexible substrate such as plastic or polymer film. Thus, a flexible metamaterial can be fabricated independent of the original substrate used.
Abstract:
A micromechanical resonator having one or more anchoring stems which are hollow to increase resonator Q factor. By way of example a micromechanical disk resonator embodiment is shown utilizing a resonant micromechanical disk anchored by a stem between at least one electrode used for input and output. To increase resonator Q, a hollow stem is utilized in which an outer thickness of stem material surrounds a hollow area interior of the stem, or that is fabricated with a plurality of vias and/or fabricated substructures containing hollow spaces in the stem material. Measurements have confirmed that Q values can be increased using the hollow core stems by a factor of 2.9 times in certain implementations and operating modes.
Abstract:
An apparatus for controlling propagation of an electromagnetic wave includes a metamaterial having an array of cells, each cell containing a metallic structure having a resonant frequency; a plurality of devices integrated in the metamaterial, each of said devices being in electrical communication with a metallic structure in a cell in the array of cells; and a controller for electrically activating each of said plurality of devices to cause said resonant frequency to change, thereby causing at least one of a permeability and permittivity of the metamaterial to change.
Abstract:
The present invention provides a dielectric resonator antenna for wireless communications, comprising a substrate made from electrically non-conductive material, a microstrip line embedded in the substrate, where the microstrip line is made from electrically conductive material, a RF connector electrically coupled with one end of the microstrip line, and a dielectric resonator element made from dielectric materials, where the dielectric resonator element is attached onto the microstrip line, wherein the microstrip line couples electromagnetic wave from the RF connector to the dielectric resonator element. The present invention further provides a process for design and fabrication of the dielectric resonator antenna.
Abstract:
An apparatus for controlling propagation of an electromagnetic wave includes a metamaterial having an array of cells, each cell containing a metallic structure having a resonant frequency; a plurality of devices integrated in the metamaterial, each of said devices being in electrical communication with a metallic structure in a cell in the array of cells; and a controller for electrically activating each of said plurality of devices to cause said resonant frequency to change, thereby causing at least one of a permeability and permittivity of the metamaterial to change.
Abstract:
A passive frequency divider in a CMOS process. More specifically, an electrical distributed parametric oscillator to realize a passive CMOS frequency divider with low phase noise. Instead of using active devices, which are the main sources of noise and power consumption, an oscillation at half of the input frequency is sustained by the parametric process based on nonlinear interaction with the input signal. For example, one embodiment is a 20 GHz frequency divider utilizing a CMOS varactor and made in a 0.13 µ?t? CMOS process. In this embodiment: (i) without any dc power consumption, 600 mV differential output amplitude can be achieved for an input amplitude of 600 mV; and (ii) the input frequency ranged from 18.5 GHz to 23.5 GHz with varactor tuning. In this embodiment, the output phase noise is almost 6 dB lower than that of the input signal for all offset frequencies up to 1 MHz. Also, a resonant parametric amplifier with a low noise figure (NF) by exploiting the noise squeezing effect. Noise squeezing occurs through the phase- sensitive amplification process and suppresses one of two quadrature components in input noise. When the input signal is only in the direction of the non-suppressed quadrature component, squeezing can lower that NF by almost 3 dB. The resonant structure of the proposed amplifier achieves the squeezing effect using a low number of LC elements.
Abstract:
Disclosed is a wireless power resonator. The wireless power resonator comprises a transmission line and a capacitor, and is formed into a loop structure. The wireless power resonator further comprises a matcher for determining the impedance of the wireless power resonator.