Hefei Institutes demonstrate graphene-based terahertz modulator at room temperature
Scientists at the Hefei Institutes of Physical Science demonstrated a graphene-based terahertz modulator achieving 92% modulation depth at 0.4 THz and switching speeds approaching 100 GHz, with results published in Nature Photonics. The device's fabrication in standard semiconductor cleanroom processes positions graphene as a viable material for scalable 6G wireless components operating in the terahertz band.
Researchers at the Hefei Institutes of Physical Science have developed a graphene-based terahertz modulator that operates at room temperature. The device, which achieves a modulation depth of 92 percent at 0.4 THz, leverages a stacked graphene-quartz heterostructure with an electrostatically tunable Fermi level. Reported in Nature Photonics, the modulator exhibits switching speeds nearing 100 GHz. Led by Dr. Han Liu, the team suggests this technology could facilitate practical 6G wireless infrastructure within the 0.1 to 1 THz frequency range. Fabricated using standard semiconductor cleanroom processes, the modulator shows potential for scalability. Patent applications have been submitted in China and the United States. The project received support from the National Natural Science Foundation of China and the Chinese Academy of Sciences.
Source: original article