Terahertz emission from antiferromagnetic magnons excited by femtosecond laser pulses

Nishitani, Junichi; Kozuki, Kohei; Nagashima, Takeshi; Hangyo, Masanori

doi:10.1109/icimw.2009.5324702

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2010

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“…We investigate the dynamical response of the conductivity at temperatures above the MIT, in the metallic state, by THz time-domain spectroscopy (0.5-2.5 THz, resp. 15-75 cm -1 ) after optical excitation of samples by 800-nm laser pulses from a 1-kHz Ti:sapphire laser system [2]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Pump/probe THz spectroscopy of the conductivity of TTF-TCNQ films

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Nishitani

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et al. 2010

35th International Conference on Infrared, Millimeter, and Terahertz Waves

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Figure 1. Absorption spectrum of TTF-TCNQ films above and below the MIT, from Ref. [3]. The narrow frequency band of the sliding-CDW conductivity at the low-frequency end from zero up to about 10 cm -1 is not resolved. Abstract-Weperform optical-pump/THz-probe measurements on TTF-TCNQ films in the metallic state to study the picosecond conductivity dynamics. The data suggest chargedensity-wave formation on a time scale of 10 ps following an ultrafast thermalization process.Pump/probe THz Spectroscopy of the Conductivity of TTF-TCNQ Films T Figure 2. Transmission change at the peak of the THz pulse as a function of time delay relative to the pump pulse.

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Section: Introductionmentioning

confidence: 99%