Title
Squeezing millimeter waves through a single, nanometer-wide, centimeter-long slit
Document Type
Article
Abstract
We demonstrate broadband non-resonant squeezing of terahertz (THz) waves through an isolated 2-nm-wide, 2-cm-long slit (aspect ratio of 107), representing a maximum intensity enhancement factor of one million. Unlike resonant nanogap structures, a single, effectively infinitely-long slit passes incident electromagnetic waves with no cutoff, enhances the electric field within the gap with a broad 1/f spectral response, and eliminates interference effects due to finite sample boundaries and adjacent elements. To construct such a uniform, isolated slit that is much longer than the millimeter-scale spot of a THz beam, we use atomic layer lithography to pattern vertical nanogaps in a metal film over an entire 4-inch wafer. We observe an increasing field enhancement as the slit width decreases from 20 nm to 2 nm, in agreement with numerical calculations.
Department(s)
Physics and Engineering
Publication Title
Scientific Reports
Volume
4
Publication Date
10-24-2014
DOI
10.1038/srep06722
E-ISSN
20452322
Recommended Citation
Chen, Xiaoshu; Park, Hyeong Ryeol; Lindquist, Nathan C.; Shaver, Jonah; Pelton, Matthew; and Oh, Sang Hyun, "Squeezing millimeter waves through a single, nanometer-wide, centimeter-long slit" (2014). Physics and Engineering Faculty Publications. 23.
https://spark.bethel.edu/physics-faculty/23