Abstract

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Nonlinear THz Spectroscopy of Molecules and Materials

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Nonlinear THz Spectroscopy of Molecules and Materials


Keith A. Nelson1

1Department of Chemistry, MIT, Cambridge, MA, USA

In recent years, nonlinear terahertz spectroscopic measurements have been demonstrated on a wide variety of molecular and material systems. Strong THz fields and metamaterial field enhancement have enabled some highly nonlinear THz-induced responses including phase transitions and chemical reactions as well as visible light emission. After a brief review of THz-induced collective material responses [1,2], molecular effects under current study will be discussed. Finally 2D THz spectra of molecules will be presented.

THz 2D spectrum. All the features are real and are spectrally resolved from the other features. A small prize is offered to a student who correctly identifies the sample. It doesn’t count if I already told you or someone else who told you.

THz 2D spectrum. All the features are real and are spectrally resolved from the other features. A small prize is offered to a student who correctly identifies the sample. It doesn’t count if I already told you or someone else who told you.

References:

[1] T. Krampath, K. Tanaka, and K.A. Nelson, Nature Photonics 7, 680 (2013).

[2] H.W. Hwang, S. Fleischer, N.C. Brandt, B.G. Perkins Jr., M. Liu, K. Fan, A. Sternbach, X. Zhang, R.D. Averitt, and K.A. Nelson, J. Mod. Opt. 61 (2014), http://dx.doi.org/10.1080/09500340.2014.918200.