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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 8 — Apr. 21, 2014
  • pp: 10017–10025

All-optical helicity dependent magnetic switching in Tb-Fe thin films with a MHz laser oscillator

Alexander Hassdenteufel, Christian Schubert, Birgit Hebler, Helmut Schultheiss, Jürgen Fassbender, Manfred Albrecht, and Rudolf Bratschitsch  »View Author Affiliations

Optics Express, Vol. 22, Issue 8, pp. 10017-10025 (2014)

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We demonstrate all-optical magnetic switching (AOS) in an amorphous Tb30Fe70 thin film, triggered by a 5.1 MHz laser oscillator. The magnetic layer is grown on SiO2/Si substrate. An identical magnetic film deposited on a microscope glass slide reveals no AOS but solely thermally induced demagnetization. This effect is due to heat accumulation by multiple laser pulses because of the low thermal conductivity of the glass substrate. In contrast, the use of a proper heat sink (e.g. SiO2/Si) avoids the need for low repetitive laser amplifier systems to induce AOS and paves the way for a cheap and simple technical implementation using conventional laser oscillators.

© 2014 Optical Society of America

OCIS Codes
(210.0210) Optical data storage : Optical data storage
(210.3820) Optical data storage : Magneto-optical materials
(210.4810) Optical data storage : Optical storage-recording materials
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
(320.7160) Ultrafast optics : Ultrafast technology
(260.7120) Physical optics : Ultrafast phenomena

ToC Category:
Optical Data Storage

Original Manuscript: January 14, 2014
Revised Manuscript: March 31, 2014
Manuscript Accepted: April 5, 2014
Published: April 18, 2014

Alexander Hassdenteufel, Christian Schubert, Birgit Hebler, Helmut Schultheiss, Jürgen Fassbender, Manfred Albrecht, and Rudolf Bratschitsch, "All-optical helicity dependent magnetic switching in Tb-Fe thin films with a MHz laser oscillator," Opt. Express 22, 10017-10025 (2014)

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