Absorption Spectra of AlGaN/GaN Terahertz Plasmonic Crystals—Experimental Validation of Analytical Approach.
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| Title: | Absorption Spectra of AlGaN/GaN Terahertz Plasmonic Crystals—Experimental Validation of Analytical Approach. |
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| Authors: | Dub, Maksym1,2 (AUTHOR) maksimdub19f94@gmail.com, Sai, Pavlo1,2 (AUTHOR) pprysta@unipress.waw.pl, Prystawko, Pawel1 (AUTHOR) knap.wojciech@gmail.com, Knap, Wojciech1,2 (AUTHOR) roumis4@gmail.com, Rumyantsev, Sergey1 (AUTHOR) |
| Source: | Nanomaterials (2079-4991). Sep2024, Vol. 14 Issue 18, p1502. 9p. |
| Subjects: | Infrared spectroscopy, Crystal filters, Absorption spectra, Plasmonics, Crystals |
| Abstract: | Absorption spectra of AlGaN/GaN grating-gate plasmonic crystals with a period from 1 µm to 2.5 µm were studied experimentally at T = 70 K using Fourier-transform infrared spectrometry. The plasmonic crystals exhibit distinct absorption lines of various plasmon harmonics across the 0.5 to 6 THz frequency range, tunable by gate voltage. Cumbersome and time-consuming electromagnetic simulations are usually needed to interpret or predict the grating-gate crystal spectra. In this work, we examine an analytical model and show that it can successfully describe the majority of existing experimental results. In this way, we demonstrate a new analytical platform for designing plasmonic crystals for THz filters, detectors, and amplifiers. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Absorption spectra of AlGaN/GaN grating-gate plasmonic crystals with a period from 1 µm to 2.5 µm were studied experimentally at T = 70 K using Fourier-transform infrared spectrometry. The plasmonic crystals exhibit distinct absorption lines of various plasmon harmonics across the 0.5 to 6 THz frequency range, tunable by gate voltage. Cumbersome and time-consuming electromagnetic simulations are usually needed to interpret or predict the grating-gate crystal spectra. In this work, we examine an analytical model and show that it can successfully describe the majority of existing experimental results. In this way, we demonstrate a new analytical platform for designing plasmonic crystals for THz filters, detectors, and amplifiers. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20794991 |
| DOI: | 10.3390/nano14181502 |
