Ultrafast Terahertz Spectroscopy of Nonlinear Metamaterials: From Probe to Control

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Date/Time:Thursday, 28 Feb 2013 - Saturday, 02 Mar 2013
Location:PHYSICS Hall Room 5
Phone:515-294-5630
Channel:Condensed Matter Physics
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Liang Luo

Graduate student, Jigang Wang's group

The Terahertz (THz, 10^12 Hz) region, ranging from about 0.1 to 15 THz, is one of the least explored yet most technologically transformative spectral regions. Emerging technology based on artificial materials containing nonlinear elements and structures has raised the prospect for unprecedented manipulation, modulation and generation of terahertz waves. In this talk, I discuss our work for addressing some pressing challenges: (1) ultrafast reversible modulation of THz resonances in strongly photoexcited nonlinear metamaterials; (2) one- and two-dimensional photo-imprinted diffraction gratings for manipulating terahertz waves; (3) single-cycle broadband THz pulse generation from a few tens of nanometers single layer of split ring resonators (SRRs) via optical rectification of femtosecond laser pulses.