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

被引：52
|
作者：
Werley, Christopher A. [1 ]
Fan, Kebin [2 ]
Strikwerda, Andrew C. [3 ]
Teo, Stephanie M. [1 ]
Zhang, Xin [2 ]
Averitt, Richard D. [3 ]
Nelson, Keith A. [1 ]
机构：
[1] MIT, Dept Chem, Cambridge, MA 02139 USA
[2] Boston Univ, Dept Mech Engn, Boston, MA 02215 USA
[3] Boston Univ, Dept Phys, Boston, MA 02215 USA
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 08期
基金：
美国国家科学基金会;
关键词：
OPTICAL MICROSCOPY; SURFACE; GENERATION; WAVES;
D O I：
10.1364/OE.20.008551
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the interaction between terahertz waves and resonant antennas with sub-cycle temporal and lambda/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. (C) 2012 Optical Society of America
引用
收藏
页码：8551 / 8567
页数：17
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