Increased terahertz emission from SI-GaAs deposited with sub-wavelength spacing metal line array
College of Science
2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)
Increased terahertz (THz) emission of surface modified semi-insulating gallium arsenide (SI-GaAs) is reported. A metal line array with sub-wavelength spacing was fabricated via e-beam deposition and THz measurements were done in the transmission excitation geometry. Results show an order of magnitude THz broadband emission enhancement. Pump-power dependent measurements were also utilized which shows a nonlinear dependence with the THz integrated intensity. This broadband enhancement is currently attributed to super transmission owing to a non-linear optical effect that may be related to surface plasmon resonance.
Digitial Object Identifier (DOI)
Faustino, M. B., Lopez, L. P., Afalla, J., Muldera, J. E., Felix, M., Salvador, A. A., Somintac, A. S., & Estacio, E. S. (2015). Increased terahertz emission from SI-GaAs deposited with sub-wavelength spacing metal line array. 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 1-2. https://doi.org/10.1109/IRMMW-THz.2015.7327918
Gallium arsenide; Terahertz spectroscopy