Laboratory for Ultrafast Thermomagnetics (LUTher)

York University, Toronto, Ontario
What the facility does

Characterization of thermal and magnetic properties of nanoscale materials using ultrafast laser pump-probe techniques.

Areas of expertise

The facility uses an ultrafast laser to capture the dynamics of heat transport and magnetic phenomena down to the picosecond time scale. This information reveals heat dissipation bottlenecks in materials and devices, and reveals under what conditions information can be stored on magnetic data storage media.

Research services
  • Time-domain thermoreflectance (TDTR)
  • Time-resolved magneto-optic Kerr effect (TR-MOKE)
  • Picosecond ultrasonic measurement of thin film thickness
  • Magnetic switching probability as function of magnetic field strength and angle, following optical pulsing
  • Curie temperature distribution in granular magnetic media
Sectors of application
  • Information and communication technologies and media
Amplitude Laser Satsuma HP2 fiber laser with second harmonic generator10 Watt fiber laser operating at 1030 nm and 515 nm; pulses tunable 350 fs to 10 ps; from single shots to 40 MHz repetition rate.
Conoptics Electro-Optic modulatorsModulators for 1030 nm and 515 nm light, up to 30 MHz digital modulation.
GMW 3473 electromagnet with rotating base and power supplyMagnetic fields of up to 3 tesla with arbitrary orientation using 50 mm pole pieces.
Newport 600 mm linear stageProvides pulse time delays of up to 4 ns.
Zurich Instruments HF2LI lock-in amplifier50 MHz bandwidth 2-channel lock-in amplifier with multi-frequency option.
Engineering prof’s research proposes solution to current data storage limitation…