Title :
Terahertz emission from antiferromagnetic magnons excited by femtosecond laser pulses
Author :
Nishitani, Junichi ; Kozuki, Kohei ; Nagashima, Takeshi ; Hangyo, Masanori
Author_Institution :
Inst. of Laser Eng., Osaka Univ., Suita, Japan
Abstract :
We report the observation of terahertz emission from coherent antiferromagnetic (AFM) magnons excited by femtosecond laser pulses. Impulsive stimulated Raman scattering (ISRS) process is a possible mechanism of the coherent AFM magnon excitation by the laser pulses. The excited coherent AFM magnons in NiO produce the terahertz emission via magnetic dipole radiation that is an inverse process of AFM resonance absorption of the terahertz wave.
Keywords :
antiferromagnetic materials; antiferromagnetic resonance; high-speed optical techniques; magnetic moments; magnons; nickel compounds; stimulated Raman scattering; terahertz wave spectra; NiO; antiferromagnetic resonance absorption; coherent antiferromagnetic magnons; femtosecond laser pulses; impulsive stimulated Raman scattering process; magnetic dipole radiation; magnon excitation; terahertz emission; Antiferromagnetic materials; Frequency; Laser excitation; Magnetic anisotropy; Magnetic materials; Optical materials; Optical pulses; Spectroscopy; Ultrafast electronics; Ultrafast optics;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5416-7
Electronic_ISBN :
978-1-4244-5417-4
DOI :
10.1109/ICIMW.2009.5324702
