Patents by Inventor Ihab F. El-Kady
Ihab F. El-Kady has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9709720Abstract: The topology of the elements of a metamaterial can be engineered from its desired electromagnetic constitutive tensor using an inverse group theory method. Therefore, given a desired electromagnetic response and a generic metamaterial elemental design, group theory is applied to predict the various ways that the element can be arranged in three dimensions to produce the desired functionality. An optimizer can then be applied to an electromagnetic modeling tool to fine tune the values of the electromagnetic properties of the resulting metamaterial topology.Type: GrantFiled: January 12, 2015Date of Patent: July 18, 2017Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Ihab F. El-Kady, Charles M. Reinke
-
Publication number: 20150192721Abstract: The topology of the elements of a metamaterial can be engineered from its desired electromagnetic constitutive tensor using an inverse group theory method. Therefore, given a desired electromagnetic response and a generic metamaterial elemental design, group theory is applied to predict the various ways that the element can be arranged in three dimensions to produce the desired functionality. An optimizer can then be applied to an electromagnetic modeling tool to fine tune the values of the electromagnetic properties of the resulting metamaterial topology.Type: ApplicationFiled: January 12, 2015Publication date: July 9, 2015Inventors: Ihab F. El-Kady, Charles M. Reinke
-
Patent number: 8600200Abstract: A nano-optomechanical transducer provides ultrabroadband coherent optomechanical transduction based on Mach-wave emission that uses enhanced photon-phonon coupling efficiencies by low impedance effective phononic medium, both electrostriction and radiation pressure to boost and tailor optomechanical forces, and highly dispersive electromagnetic modes that amplify both electrostriction and radiation pressure. The optomechanical transducer provides a large operating bandwidth and high efficiency while simultaneously having a small size and minimal power consumption, enabling a host of transformative phonon and signal processing capabilities. These capabilities include optomechanical transduction via pulsed phonon emission and up-conversion, broadband stimulated phonon emission and amplification, picosecond pulsed phonon lasers, broadband phononic modulators, and ultrahigh bandwidth true time delay and signal processing technologies.Type: GrantFiled: March 30, 2011Date of Patent: December 3, 2013Assignee: Sandia CorporationInventors: Peter T. Rakich, Ihab F. El-Kady, Roy H. Olsson, Mehmet Fatih Su, Charles Reinke, Ryan Camacho, Zheng Wang, Paul Davids
-
Patent number: 8525619Abstract: A very high-Q, low insertion loss resonator can be achieved by storing many overtone cycles of a lateral acoustic wave (i.e., Lamb wave) in a lithographically defined suspended membrane comprising a low damping resonator material, such as silicon carbide. The high-Q resonator can sets up a Fabry-Perot cavity in a low-damping resonator material using high-reflectivity acoustic end mirrors, which can comprise phononic crystals. The lateral overtone acoustic wave resonator can be electrically transduced by piezoelectric couplers. The resonator Q can be increased without increasing the impedance or insertion loss by storing many cycles or wavelengths in the high-Q resonator material, with much lower damping than the piezoelectric transducer material.Type: GrantFiled: May 28, 2010Date of Patent: September 3, 2013Assignee: Sandia CorporationInventors: Roy H. Olsson, Ihab F. El-Kady, Maryam Ziaei-Moayyed, Darren W. Branch, Mehmet F. Su, Charles M. Reinke
-
Patent number: 8508370Abstract: Synthetic thermoelectric materials comprising phononic crystals can simultaneously have a large Seebeck coefficient, high electrical conductivity, and low thermal conductivity. Such synthetic thermoelectric materials can enable improved thermoelectric devices, such as thermoelectric generators and coolers, with improved performance. Such synthetic thermoelectric materials and devices can be fabricated using techniques that are compatible with standard microelectronics.Type: GrantFiled: June 9, 2011Date of Patent: August 13, 2013Assignee: Sandia CorporationInventors: Ihab F. El-Kady, Roy H. Olsson, Patrick Hopkins, Charles Reinke, Bongsang Kim
-
Patent number: 8094023Abstract: Phononic crystals that have the ability to modify and control the thermal black body phonon distribution and the phonon component of heat transport in a solid. In particular, the thermal conductivity and heat capacity can be modified by altering the phonon density of states in a phononic crystal. The present invention is directed to phononic crystal devices and materials such as radio frequency (RF) tags powered from ambient heat, dielectrics with extremely low thermal conductivity, thermoelectric materials with a higher ratio of electrical-to-thermal conductivity, materials with phononically engineered heat capacity, phononic crystal waveguides that enable accelerated cooling, and a variety of low temperature application devices.Type: GrantFiled: February 27, 2009Date of Patent: January 10, 2012Assignee: Sandia CorporationInventors: Ihab F. El-Kady, Roy H. Olsson
-
Patent number: 7836566Abstract: A microfabricated bulk wave acoustic bandgap device comprises a periodic two-dimensional array of scatterers embedded within the matrix material membrane, wherein the scatterer material has a density and/or elastic constant that is different than the matrix material and wherein the periodicity of the array causes destructive interference of the acoustic wave within an acoustic bandgap. The membrane can be suspended above a substrate by an air or vacuum gap to provide acoustic isolation from the substrate. The device can be fabricated using microelectromechanical systems (MEMS) technologies. Such microfabricated bulk wave phononic bandgap devices are useful for acoustic isolation in the ultrasonic, VHF, or UHF regime (i.e., frequencies of order 1 MHz to 10 GHz and higher, and lattice constants of order 100 ?m or less).Type: GrantFiled: April 21, 2010Date of Patent: November 23, 2010Assignee: Sandia CorporationInventors: Roy H. Olsson, Ihab F. El-Kady, Frederick McCormick, James G. Fleming, Carol Fleming, legal representative
-
Patent number: 7733198Abstract: A microfabricated bulk wave acoustic bandgap device comprises a periodic two-dimensional array of scatterers embedded within the matrix material membrane, wherein the scatterer material has a density and/or elastic constant that is different than the matrix material and wherein the periodicity of the array causes destructive interference of the acoustic wave within an acoustic bandgap. The membrane can be suspended above a substrate by an air or vacuum gap to provide acoustic isolation from the substrate. The device can be fabricated using microelectromechanical systems (MEMS) technologies. Such microfabricated bulk wave phononic bandgap devices are useful for acoustic isolation in the ultrasonic, VHF, or UHF regime (i.e., frequencies of order 1 MHz to 10 GHz and higher, and lattice constants of order 100 ?m or less).Type: GrantFiled: May 15, 2007Date of Patent: June 8, 2010Assignee: Sandia CorporationInventors: Roy H. Olsson, Ihab F. El-Kady, Frederick McCormick, James G. Fleming, Carol Fleming, legal representative