Time-resolved imaging of near-fields in THz antennas and direct quantitative measurement of field enhancements

Author(s)
Werley, Christopher Alan; Fan, Kebin; Strikwerda, Andrew C.; Teo, Stephanie Meng-Yan; Zhang, Xin; ... Show more
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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.
Date issued
2012-04
URI
http://hdl.handle.net/1721.1/71939
Department
Massachusetts Institute of Technology. Department of Chemistry
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
ISSN
1094-4087
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