Optimization of the frequency response of a novel GaAs plasmonic terahertz detector
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Previously there was reported a new type of high-speed plasmonic THz detector that can operate at room temperature. As an extension of that work, the sensitivity of the detector was investigated over a wide range of sub-THz frequencies. The measured frequency response is not purely monotonic but exhibits oscillatory behaviour with a number of maxima and minima. Our study reveals that such frequency dependence is caused by the interference of electromagnetic waves inside the detector substrate, as the frequencies of these extrema are found to be governed by the substrate thickness. We demonstrate that sensitivity of this type of detector can be optimized for the desired operating frequency within 0.06–0.7 THz spectrum by adjusting the substrate thickness. We also show that a monotonic frequency response with eliminated minima can be achieved by mounting the detector on a specially designed silicon lens.
KeywordsTerahertz Detection Frequency response
The work was supported by the Russian Science Foundation Grant No. 19-72-30003
The authors would like to recognize Dr. Oleg Khrichenko, a technical writing specialist at TeraSense Group Inc., for his substantial contribution to drafting, language editing and proofreading of the manuscript.
- Fernandes, L.O.T., et al.: Photometry of THz radiation using Golay cell detector. In: 2011 XXXth URSI General Assembly and Scientific Symposium, Istanbul, pp. 1–4 (2011)Google Scholar
- Knap, W., But, D., Dyakonova, N., Coquillat, D., et al.: Terahertz imaging with GaAs and GaN plasma field effect transistors detectors. In: 2016 MIXDES - 23rd International Conference Mixed Design of Integrated Circuits and Systems, Lodz, pp. 74–77 (2016)Google Scholar
- Knap, W., et al.: Terahertz waves. J. Infrared Millim. 30, 1319–1337 (2009)Google Scholar
- Knap, W., Dyakonov, M., Coquillat, D., Teppe, F., Dyakonova, N., Łusakowski, J., Karpierz, K., Sakowicz, M., Valusis, G., Seliuta, D., Kasalynas, I., El Fatimy, A., Meziani, Y.M., Otsuji, T.: Field effect transistors for terahertz detection: Physics and first imaging applications. J. Infrared Millim. Terahertz Waves 30, 1319–1337 (2009)Google Scholar
- Muravev, V.M., Gusikhin, P.A., Zarezin, A.M., Andreev, I.V., Gubarev, S.I., Kukushkin, I.V.: Novel 2D plasmon induced by metal proximity, 99, 241406(R) (2019)Google Scholar
- Ojefors, E., Baktash, N., Zhao, Y., Hadi, R.A., Sherry, H., Pfeiffer, U.R.: Terahertz imaging detectors in a 65-nm CMOS SOI technology. In: 2010 Proceedings of ESSCIRC, Seville, pp. 486–489 (2010)Google Scholar
- Ruan, S., Yang, J., Zhang, M.: Real-time terahertz imaging using a 1.63 THz optically-pumped terahertz laser and a pyroelectric camera. In: Proceedings of the SPIE, 28th International Congress on High-Speed Imaging Photonics, 7126, 1261U–1–6 (2009)Google Scholar
- Shaikhaidarov, R., Antonov, V.N., Casey, A., Kalaboukhov, A., Kubatkin, S., Harada, Y., Onomitsu, K., Tzalenchuk, A., Sobolev, A.: Detection of coherent terahertz radiation from a high-temperature superconductor Josephson junction by a semiconductor quantum-dot detector. Phys. Rev. Appl. 5, 024010–024015 (2016)ADSCrossRefGoogle Scholar
- Tsydynzhapov, G.E., Gusikhin, P.A., Muravev, V.M., Andreev, I.V., Kukushkin, I.V.: New terahertz security body scanner. In: 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, pp. 1–1 (2018)Google Scholar