Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

UCLA engineers announce breakthrough in semiconductor spin wave research

08.05.2006


Engineers at the UCLA Henry Samueli School of Engineering and Applied Science are announcing a critical new breakthrough in semiconductor spin-wave research.



UCLA Engineering adjunct professor Mary Mehrnoosh Eshaghian-Wilner, researcher Alexander Khitun and professor Kang Wang have created three novel nanoscale computational architectures using a technology they pioneered called “spin-wave buses” as the mechanism for interconnection. The three nanoscale architectures are not only power efficient, but also possess a high degree of interconnectivity.

“Progress in the miniaturization of semiconductor electronic devices has meant chip features have become nanoscale. Today’s current devices, which are based on complementary metal oxide semiconductor standards, or ‘CMOS,’ can’t get much smaller and still function properly and effectively. CMOS continues to face increasing power and cost challenges,” Wang said.


In contrast to traditional information processing technology devices that simply move electric charges around while ignoring the extra spin that tags along for the ride, spin-wave buses put the extra motion to work transferring data or power between computer components. Information is encoded directly into the phase of the spin waves. Unlike a point-to-point connection, a “bus” can logically connect several peripherals. The result is a reduction in power consumption, less heat and, ultimately, the ability to make components much smaller as no physical wires are actually used to send the data.

“Design of nanoscale architectures for computing is a very new area, but an important one for the future. In order to produce effective nanoscale devices, we need to actively look at new low power designs that can have efficient interconnectivity and allow scaling beyond current barriers,” Eshaghian-Wilner said.

The idea of using spin waves for information transmission and processing was first developed under the name “spin-wave buses” by UCLA Engineering’s Khitun, Wang and graduate researcher Roman Ostroumov.

“We’ve made a significant effort to demonstrate the operation of spin-based devices at room temperature,” Khitun said. “Our experimental results confirm the intriguing fact that information can be transmitted via spin waves propagating in spin waveguides — ferromagnetic films.”

The innovative work with spin-wave buses recently garnered the trio a prestigious 2006 Inventor Recognition Award from the Microelectronics Advanced Research Corp. The corporation funds and operates university-based research centers in microelectronics technology, seeking to expand cooperative, long-range applied microelectronics research at U.S. universities.

UCLA Engineering’s team contends that the creation and detection of spin-wave packets in nanostructures can be used efficiently to perform massively parallel computational operations, allowing for the design of the first practical, fully interconnected network of processors on a single chip. This breaks with currently proposed spintronic architectures, which rely on a charge transfer for information exchange and show significant interconnect problems.

Eshaghian-Wilner, in conjunction with Khitun and Wang, has developed three innovative, spin-wave bus-based designs that use spin waves to achieve the low-power device performance and improved scalability highly desired by industry chip manufacturers.

The first device developed by UCLA engineers, described in a paper presented publicly at the annual ACM International Conference on Computing Frontiers, being held in Ischia, Italy, during the first week of May, is a reconfigurable mesh interconnected with spin-wave buses. The architecture of the device requires the same number of switches and buses as standard reconfigurable meshes, but is capable of simultaneously transmitting multiple waves using different frequencies on each of the spin-wave buses — making the parallel architecture capable of very fast and fault-tolerant algorithms. Unlike the traditional spin-based nanostructures that transmit charge, with this design only waves are transmitted, keeping power consumption extremely low.

“This innovative design represents an original approach for nanoscale computational devices while preserving all of the advantages of wave-based computing,” Eshaghian-Wilner said.

The second architecture invention, details of which will be published at the Nano Science and Technology Institute 9th Annual Nanotechnology Conference and Trade Show — or Nanotech 2006 — being held in Boston during the second week of May, is a fully connected cluster of functional units with spin-wave buses. Each node simultaneously broadcasts to all other nodes, and can receive and process multiple data concurrently. The novel design allows all nodes to intercommunicate in constant time. This invention overcomes traditional area restrictions found in current networks.

The researchers also have developed a spin-wave-based crossbar for fully interconnecting multiple inputs to multiple outputs, and plan to announce the full details of the design at the 2006 IEEE Conference on Nanotechnology to be held in Cincinnati, Ohio, this coming July. As compared to standard molecular crossbar designs, UCLA Engineering’s is much more fault-tolerant — allowing alternate paths to be reconfigured in case of switch failure. By transmitting waves instead of traditional current charge transmission, the design architecture allows a large reduction in power consumption and provides a high level of interconnectivity between many more paths than currently possible.

“We’re tremendously excited about the future of this research,” Eshaghian-Wilner said. “The designs demonstrate outstanding performance as interconnects for massively parallel integrated circuits.”

“Over the past few years, scientists have studied a variety of methods for designing nanoscale computer architectures. Our collaborative approach using spin-wave buses is a novel one that we hope will lead to additional breakthroughs,” Khitun added.

Currently, various extensions and applications of these three designs are being studied and evaluated by the UCLA Engineering team and their students. Postgraduate researcher Shiva Navab is proposing a set of innovative techniques for mapping biologically inspired types of computations on these models for image processing and neural computations. Other application areas being investigated include bioinformatics and implantable biomedical devices. Heterogeneous integrations of these designs in a complementary fashion with other molecular and nanotechnologies also are being developed.

The architectural methods are undergoing implementation and further testing at the UCLA Device Research Laboratories by research scientists Joon Young Lee, who specializes in spin wave based device processing, and Ming Bao, who carries out the time-resolved inductive voltage measurements aimed at detecting spin waves propagating in 100-nanometer-thick ferromagnetic films. The Device Research Laboratories nano facilities are led by Wang, director of the Functional Engineered Nano Architectonics Focus Center and the newly developed Western Institute of Nanotechnology, all headquartered at the UCLA Henry Samueli School of Engineering and Applied Science.

Licensing inquiries should be directed to Dina Lozofsky at (310) 794-0204 or dina@resadmin.ucla.edu.

Melissa Abraham | EurekAlert!
Further information:
http://www.ucla.edu

More articles from Power and Electrical Engineering:

nachricht Stanford researchers develop a new type of soft, growing robot
21.07.2017 | Stanford University

nachricht Team develops fast, cheap method to make supercapacitor electrodes
18.07.2017 | University of Washington

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Manipulating Electron Spins Without Loss of Information

Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.

For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...

Im Focus: The proton precisely weighted

What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.

To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...

Im Focus: On the way to a biological alternative

A bacterial enzyme enables reactions that open up alternatives to key industrial chemical processes

The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....

Im Focus: The 1 trillion tonne iceberg

Larsen C Ice Shelf rift finally breaks through

A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...

Im Focus: Laser-cooled ions contribute to better understanding of friction

Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision

Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Closing the Sustainability Circle: Protection of Food with Biobased Materials

21.07.2017 | Event News

»We are bringing Additive Manufacturing to SMEs«

19.07.2017 | Event News

The technology with a feel for feelings

12.07.2017 | Event News

 
Latest News

NASA looks to solar eclipse to help understand Earth's energy system

21.07.2017 | Earth Sciences

Stanford researchers develop a new type of soft, growing robot

21.07.2017 | Power and Electrical Engineering

Vortex photons from electrons in circular motion

21.07.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>