| Autor: |
Glinskiy, I. A., Yachmenev, A. E., Lavrukhin, D. V., Khabibullin, R. A., Gamkrelidze, S. A., Zaytsev, K. I., Spektor, I. E., Ponomarev, D. S. |
| Zdroj: |
Nanobiotechnology Reports; December 2022, Vol. 17 Issue: Supplement 1 pS24-S30, 7p |
| Abstrakt: |
Abstract: Plasmonic metasurfaces for photoconductive antennas (PCAs) based on InAlAs/InGaAs superlattice heterostructures are proposed and fabricated. It is found by the measurements of the PCAs in a terahertz pulsed spectrometer that the maximum detected integrated terahertz power is 5.3 μW (the optical-to-THz conversion efficiency is 0.19%) under laser pumping at an average power of 2.8 mW and a bias voltage of 8.6 V. The signal increment caused by the excitation of plasmonic modes makes it possible to obtain a high signal-to-noise ratio (~80 dB). The experiments show that the emitted power density increases with the metasurface metallization height (thickness). With the parameters obtained, the developed antennas can open a path towards the development of THz spectroscopic and imaging systems in Russia. |
| Databáze: |
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