Title :
Terahertz radiation from coherent antiferromagnetic magnons excited by circularly polarized laser pulses
Author :
Nishitani, Junichi ; Nagashima, Takeshi ; Hangyo, Masanori
Author_Institution :
Inst. of Laser Eng., Osaka Univ., Suita, Japan
Abstract :
We have observed terahertz radiation from coherent antiferromagnetic magnons excited by circularly polarized laser pulses. The polarity of the magnons is reversed by switching the helicity of the circular polarization. Inverse Faraday effect is a possible mechanism of the coherent magnon excitation.
Keywords :
Faraday effect; antiferromagnetic materials; excited states; laser beam effects; light polarisation; magnons; terahertz wave spectra; circular polarization; circularly polarized laser pulses; coherent antiferromagnetic magnons; coherent magnon excitation; helicity switching; inverse Faraday effect; magnon polarity; terahertz radiation; Crystals; Laser excitation; Magnetic domains; Magnetic moments; Measurement by laser beam; Temperature measurement;
Conference_Titel :
Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010 35th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-6655-9
DOI :
10.1109/ICIMW.2010.5612484
