Title :
Asynchronous optical probing of coherent magnetic excitations from picoseconds to nanoseconds
Author :
Stoica, Vladimir A. ; Sheu, Yu-Miin ; Reis, David A. ; Clarke, Roy
Author_Institution :
Dept. of Phys., Univ. of Michigan, Ann Arbor, MI
Abstract :
Thermoreflectance and coherent spin dynamics in Fe films are measured using asynchronous optical sampling at kilohertz rates. We observe ultrafast laser-induced time dependence of spin precession frequencies that is attributed to thermal relaxation.
Keywords :
high-speed optical techniques; iron; metallic thin films; spin dynamics; thermoreflectance; Fe; asynchronous optical probe; asynchronous optical sampling; coherent magnetic excitation; coherent spin dynamics; spin precession frequency; thermal relaxation; thermoreflectance; ultrafast laser-induced time dependence; Delay effects; Frequency measurement; Iron; Magnetic field measurement; Magnetization; Optical films; Optical pumping; Pump lasers; Thermoreflectance; Ultrafast optics; (120.6810) Thermal effects; (300.6500) Spectroscopy, time-resolved; (310.6870) Thin films, other properties; (320.5390) Picosecond phenomena; (320.7100) Ultrafast measurements;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
