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

fYear

2009

fDate

21-25 Sept. 2009

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICIMW.2009.5324702

Filename

5324702