Absorption Spectra of AlGaN/GaN Terahertz Plasmonic Crystals—Experimental Validation of Analytical Approach

This is a set of research data related to the article titled "Absorption Spectra of AlGaN/GaN Terahertz Plasmonic Crystals—Experimental Validation of Analytical Approach" MDPI Nanomaterials 14(18):1502 (2024), doi: 10.3390/nano1481502.The set contains numerical data used to create the next Figures:Figure 2. Input (a) and output (b) current-voltage characteristics of the representative AlGaN/GaN grating-gate plasmonic crystal structure at different drain and gate voltage Vd and Vg, respectively.Figure 3. Transmission spectra for the S2 structure at different gate voltage. (b) Plasmon resonance frequency as a function of the gate voltage overdrive Vg-Vth for the plasmonic crystal with different periods of P=1um (Structure S2) and P=2.5um (structure S8) and for different harmonics n.Figure 4. The experimental frequencies of the first harmonic in AlGaN/GaN plasmonic crystals and those calculated using Equation (2) for the structures experimentally studied in the current work and from publication. The wave vector is taken to be equal to q=2pi/P.Figure 5. Experimental frequencies as a function of the F the first harmonic number in AlGaN/GaN plasmonic crystals and those calculated using Equation (2) for the structures experimentally studied in the current work and from publication in reference.Figure 6. Frequency of the first harmonic as a function of the gate voltage overdrive (Vg-Vth) for the S2 Structure. Experiment data and calculation using Equation (2).