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SUMMARY:Magnonics – putting a new spin on microwaves
DTSTART:20170317T171500
DTSTAMP:20260528T092918Z
UID:d6fb5635f2015fad5914b3b91bc62a26b28da26918f5c188c4ea890b
CATEGORIES:Inaugural lectures - Honorary Lecture
DESCRIPTION:Prof. Dirk Grundler\, Institute of Materials and Institute of 
 Microengineering\, STI\, EPFL\nMagnetic materials played an essential role
  in the increasing needs in nonvolatile data storage during the recent dec
 ades. Still\, the emergence of smart and handheld devices has led to new s
 torage concepts that have replaced the existing magnetic technology. They 
 offer faster data processing\, low power consumption and avoidance of mech
 anical parts. Recent discoveries such as spin-transfer torque\, gigahertz 
 nanooscillators\, and magnonic grating couplers have stimulated a renewed 
 technological interest in magnetic materials. In addition\, nanoscale spin
  whirls\, so-called magnetic skyrmions were experimentally verified in chi
 ral magnets in 2009 and fostered further research efforts in the field of 
 spin-based electronics.\n \nIn our laboratory we investigate magnetic bul
 k materials\, thin films and nanostructures that contain specific spin str
 uctures and magnetic domains. The spin structures are tailored either thro
 ugh confinement effects by exploiting state-of-the-art nanotechnologies or
  via chiral magnets that host spin helices and skyrmions. We study their d
 ynamic properties and address particularly wave-like spin excitations. Usi
 ng integrated microwave antennas we directly couple electromagnetic waves 
 to the spin waves (magnons). Their frequencies range from a few 100 MHz to
  several 10 GHz and hence cover the regime of microwaves that is of key re
 levance for modern information technologies (wifi\, internet of things\, c
 ell phones).\n \nIn the talk we discuss nanoengineered magnets and so-cal
 led magnonic crystals that serve as microwave-to-magnon transducers. We de
 monstrate that on-chip wavelengths are shrinked by five orders of magnitud
 e compared to the free-space electromagnetic wave. Thereby wavelengths sim
 ilar to soft x-ray radiation can be achieved that allow for microwave comp
 onents operating at the nanoscale. We show that the magnetic microwave dev
 ices are reprogrammable via different magnetic states\, enabling reconfigu
 rable electronics. Nanomaterials exploiting the spin degree of freedom pro
 mise microwave circuitry that is thus nanoscale and multifunctional by com
 bining e.g. wave-based logic with nonvolatile storage.\n\nProgram:\n\n-Int
 roduction by Prof. Harm-Anton Klok\, Director of the Materials Institute\n
 -Inaugural Lecture of Dirk Grundler: "Magnonics – putting a new spin on 
 microwaves"\n\nRegistration required: http://go.epfl.ch/grundler\n\nBio: D
 irk Grundler is an associate professor at the Institute of Materials since
  2015. Current research interests focus on magnetic nanostructures and mat
 erials to be exploited in spintronics\, magnonics and spin caloritronics. 
 He studied physics at the University of Hamburg\, Germany\, and entered th
 e Philips Research Laboratories\, Hamburg\, Germany\, in 1990 for his Dipl
 oma and PhD theses working on superconducting sensors for biomagnetism and
  medical applications. In 1995 Dirk Grundler joined the Microstructure Res
 earch Center at the Institute for Applied Physics of University of Hamburg
  as a postdoctoral researcher investigating magnetic properties of low-dim
 ensional electron systems and semiconductor spintronics. He received the h
 abilitation in experimental physics at University of Hamburg in 2001. From
  2005 to 2015 he was professor at the Technische Universitaet Muenchen\, G
 ermany\, holding the chair of “Physics of functional multilayers”.
LOCATION:ELA1 http://plan.epfl.ch/?request_locale=fr&room=ELA1&domain=plac
 es
STATUS:CONFIRMED
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