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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 8 — Apr. 9, 2012
  • pp: 8551–8567

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

Christopher A. Werley, Kebin Fan, Andrew C. Strikwerda, Stephanie M. Teo, Xin Zhang, Richard D. Averitt, and Keith A. Nelson  »View Author Affiliations

Optics Express, Vol. 20, Issue 8, pp. 8551-8567 (2012)

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We investigate the interaction between terahertz waves and resonant antennas with sub-cycle temporal and λ/100 spatial resolution. Depositing antennas on a LiNbO3 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.

© 2012 OSA

OCIS Codes
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(250.5403) Optoelectronics : Plasmonics
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Nonlinear Optics

Original Manuscript: January 13, 2012
Revised Manuscript: March 21, 2012
Manuscript Accepted: March 21, 2012
Published: March 28, 2012

Christopher A. Werley, Kebin Fan, Andrew C. Strikwerda, Stephanie M. Teo, Xin Zhang, Richard D. Averitt, and Keith A. Nelson, "Time-resolved imaging of near-fields in THz antennas and direct quantitative measurement of field enhancements," Opt. Express 20, 8551-8567 (2012)

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