focused spin wave
beams, University of Gothenburg
(December 22, 2015) Researchers
at the University of Gothenburg Physics Department have finally found the
secret to synchronize an unlimited number of spintronic oscillators. Such
devices are very promising for future applications requiring wideband
functionality.
Unfortunately, such nanoscale microwave oscillators suffer
from an unbearable low power and high phase noise. It is generally accepted
that one of the most attractive ways to solve this issue is to synchronize a
large number of these nanoscopic oscillators in order to limit the detrimental
influence of thermal energy.
The synchronization of two such oscillators was first
published in 2005. However, by 2013 the number of synchronized oscillators had
only increased to four low-frequency oscillators and three microwave-frequency
oscillators. Furthermore, the coupling was difficult to control in a
reproducible manner.