A review of non-linear terahertz spectroscopy with ultrashort tabletop-laser pulses
© 2014 Taylor & Francis. Over the past decade, breakthroughs in the generation and control of ultrafast high-field terahertz (THz) radiation have led to new spectroscopic methodologies for the study of light-matter interactions in the strong-field limit. In this review, we will outline recent experimental demonstrations of non-linear THz material responses in materials ranging from molecular gases, to liquids, to varieties of solids - including semiconductors, nanocarbon, and correlated electron materials. New insights into how strong THz fields interact with matter will be discussed in which a THz field can act as either a non-resonant electric field or a broad bandwidth pulse driving specific resonances within it. As an emerging field, non-linear THz spectroscopy shows promise for elucidating dynamic problems associated with next generation electronics and optoelectronics, as well as for demonstrating control over collective material degrees of freedom.
Hwang, HY; Fleischer, S; Brandt, NC; Perkins, BG; Liu, M; Fan, K; Sternbach, A; Zhang, X; Averitt, RD; Nelson, KA
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