Send to:

Choose Destination
See comment in PubMed Commons below
Opt Express. 2010 Apr 26;18(9):9643-50. doi: 10.1364/OE.18.009643.

Superfocusing terahertz waves below lambda/250 using plasmonic parallel-plate waveguides.

Author information

  • 1Department of Electrical and Computer Engineering, MS-366, Rice University, Houston, Texas 77251, USA.


We experimentally demonstrate complete two-dimensional (2-D) confinement of terahertz (THz) energy in finite-width parallel-plate waveguides, defying conventional wisdom in the century-old field of microwave waveguide technology. We find that the degree of energy confinement increases exponentially with decreasing plate separation. We propose that this 2-D confinement is mediated by the mutual coupling of plasmonic edge modes, analogous to that observed in slot waveguides at optical wavelengths. By adiabatically tapering the width and the separation, we focus THz waves down to a size of 10 microm (approximately lambda/260) by 18 microm ( approximately lambda/145), which corresponds to a mode area of only 2.6 x 10(-5) lambda(2).

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Optical Society of America
    Loading ...
    Write to the Help Desk