Time-resolved imaging of near-fields in THz antennas and direct quantitative measurement of field enhancements
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Nelson_Time-resolved.pdf
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Author(s)
Werley, Christopher Alan
Fan, Kebin
Strikwerda, Andrew C.
Teo, Stephanie Meng-Yan
Zhang, Xin
Averitt, Richard D.
Nelson, Keith Adam
Date Issued
April 2012
Journal
Optics Express
Publisher
Optical Society of America
Citation
Werley, Christopher A. et al. “Time-resolved Imaging of Near-fields in THz Antennas and Direct Quantitative Measurement of Field Enhancements.” Optics Express 20.8 (2012): 8551.
© 2012 OSA
Version
Final published version
Abstract
We investigate the interaction between terahertz waves and resonant antennas with sub-cycle temporal and λ/100 spatial resolution. Depositing antennas on a LiNbO[subscript 3] waveguide enables non-invasive electro-optic imaging, quantitative field characterization, and direct measurement of field enhancement (up to 40-fold). The spectral response is determined over a bandwidth spanning from DC across multiple resonances, and distinct behavior is observed in the near- and far-field. The scaling of enhancement and resonant frequency with gap size and antenna length agrees well with simulations.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1364/OE.20.008551
