On-chip terahertz modulation and emission with integrated graphene junctions
Abstract
The efficient modulation and control of ultrafast signals on-chip is of central importance in terahertz (THz) communications and a promising 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 20, 2020
- Source ID
- 10.1063/5.0005870
Entities
People
- Alex Potts
- Andrea Young
- Jacob Schalch
- Joshua O. Island
- Kenji Watanabe
- Peter Kissin
- Richard D. Averitt
- Sheikh Rubaiat Ul Haque
- Takashi Taniguchi
- Xiaomeng Cui
Organizations
- Army Research Office
- Dutch Research Council
- National Institute for Materials Science
- University of California, San Diego
- University of Nevada, Las Vegas