Opportunity at National Institute of Standards and Technology (NIST)
Graphene for Terahertz Sources and Detectors
Physical Measurement Laboratory, Quantum Electromagnetics Division
Please note: This Agency only participates in the February and August reviews.
|Keller, Mark William
|Plusquellic, David Francis
The wavelength range of the electromagnetic spectrum between roughly 1 mm and 30 µm, known as the "THz gap", is rich with promising applications but suffers from a lack of high-performance sources and detectors. Longer and shorter wavelengths are well served by microwave and infrared devices, but the crossover between electronics and photonics remains a challenge. Graphene has unique electronic properties that promise to enable detectors, amplifiers, mixers, and sources that exceed the performance of existing technology in the THz range. We fabricate devices from wafer-scale, CVD graphene and apply various measurement techniques across the microwave-THz-infrared range, with a focus on quantifying and understanding the limitations on performance of graphene in realistic device structures. Among the facilities available for this work are (1) a custom, cold-wall CVD system for graphene and boron nitride; (2) unique instruments for high-resolution, broadband (0.06 THz to 3 THz) measurements in transmission and reflection geometries over a wide temperature range (< 4 K to 350 K); and (3) phase-sensitive, chirped-pulse and dual frequency comb measurements with powers up to 100 mW. We also have numerous tools for imaging and characterization of complete device structures and component materials. An even wider range of tools, including THz frequency combs based on femtosecond fiber and ring lasers, is available through ongoing collaborations with multiple groups within NIST and at the University of Colorado.
Graphene; Terahertz; Spectroscopy;
Open to U.S. citizens
Open to Postdoctoral applicants