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


Journal Article

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 electrooptic 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 Optical Society of America.

Full Text

Cited Authors

  • Werley, CA; Fan, K; Strikwerda, AC; Teo, SM; Zhang, X; Averitt, RD; Nelson, KA

Published Date

  • April 9, 2012

Published In

Volume / Issue

  • 20 / 8

Start / End Page

  • 8551 - 8567

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/OE.20.008551

Citation Source

  • Scopus