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

pdf

File Size

1.262 KB

Language

English

Available for download on Tuesday, April 20, 2021

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