Document Type
Article
Publication Date
4-20-2020
Publication Title
Applied Physics Letters
Volume
116
First page number:
1
Last page number:
5
Abstract
The efficient modulation and control of ultrafast signals on-chip is of central importance in terahertz (THz) communications and a promis- ing route toward sub-diffraction limit THz spectroscopy. Two-dimensional (2D) materials may provide a platform for these endeavors. We explore this potential, integrating high-quality graphene p–n junctions within two types of planar transmission line circuits to modulate and emit picosecond pulses. In a coplanar strip line geometry, we demonstrate the electrical modulation of THz signal transmission by 95%. In a Goubau waveguide geometry, we achieve complete gate-tunable control over THz emission from a photoexcited graphene junction. These studies inform the development of on-chip signal manipulation and highlight prospects for 2D materials in THz applications.
Disciplines
Materials Science and Engineering | Physics
File Format
File Size
1290 KB
Language
English
Repository Citation
Island, J. O.,
Kissin, P.,
Schalch, J.,
Cui, X.,
Haque, S. R.,
Potts, A.,
Taniguchi, T.,
Watanabe, K.,
Averitt, R. D.,
Young, A. F.
(2020).
On-Chip Terahertz Modulation and Emission With Integrated Graphene Junctions.
Applied Physics Letters, 116
1-5.
http://dx.doi.org/10.1063/5.0005870
