The Fermi level is set to 0.2 eV, the 2-Bromo-6-nitrophenol custom synthesis transmission of peak I reduces to 0.424. As the graphene Fermi level increases, peak I undergoes a continuous decrease, whereas peak II adjustments minimally. Prior studies have shown that the graphene Fermi level could be modulated to become 1.2 eV [34]. When the Fermi level increases to 1.2 eV, peak I disappears completely, which causes an off state. So as to quantitatively describe the modulation depth from the PIT transparent windows, we introduce the formula T = T0 – Tg /T0 one hundred , exactly where T0 and Tg refer to the amplitude of transmission Nanomaterials 2021, 11, x FOR PEER Critique peak with out and with graphene, respectively. Ultimately, with the Fermi degree of 1.2 eV, the transmission of peak I reduces to 0.137, correspondingly the modulation depth of peak I is calculated to be 82.4 making use of the formula.6 ofFigure five. (a) The simulated (b) (b) analytical transmission spectrum with various unique Ferm Figure5. (a) The simulated andand analytical fitted fitted transmission spectrum with Fermi levels of strip (c) The simulated and (d) (d) analytical fitted transmission with distinctive levels of strip two. 2. (c) The simulated andanalytical fitted transmission spectrumspectrum with differe Fermi levels strip 1. Fermilevels ofof strip 1.In order to further investigate the independent tunable mechanism with the dual-P transparency window by tuning the graphene Fermi level, we analyzed the interaction the PF-06454589 medchemexpress vibrant and two dark modes applying the three-harmonic oscillator model [35]. As a brigNanomaterials 2021, 11,6 ofIn Figure 5c, it can be observed that, because the Fermi amount of strip 1 increases from 0.2 eV to 1.two eV, the transmission change of peak II is related to that of peak I; namely, the amplitude of peak II decreases with all the improve within the graphene Fermi level. When the graphene Fermi level reaches1.two eV, the transmission of peak II is 0.2022. The modulation depth of peak II can accomplish 74.7 . For that reason, this design can realize the optical switch-like regulation of peak I and peak II by adjusting the Fermi level of strip 1 and strip two, respectively. In order to further investigate the independent tunable mechanism in the dual-PIT transparency window by tuning the graphene Fermi level, we analyzed the interaction on the vibrant and two dark modes making use of the three-harmonic oscillator model [35]. As a vibrant mode, the LSPR at CW may be represented by oscillator 1 arising from direct coupling with the plane wave. Because the dark modes excited via near field coupling together with the bright mode, the BDSSRs and UDSSRs are represented by oscillator 2 and three, respectively. The coupling impact in between the 3 resonance modes is described by the following formula:2 x0 (t) 0 x0 (t) 0 x0 (t) 1 x1 (t) 2 x2 (t) = 0 E two x1 (t) 1 x1 (t) 1 x1 (t) – 1 x0 (t) = 0 2 x2 (t) 2 x2 (t) two x2 (t) – 2 x0 (t) = 0 .. . . .. . . .. . . .(five) (6) (7)Here, E represents the incident electromagnetic field, 0 describes the coupling strength with the electromagnetic field. 0 , 1 , 2 would be the resonance frequencies of oscillator 1, oscillator 2 and oscillator three, respectively. x0 and 0 will be the amplitude and damping from the vibrant resonance mode. x1 and x2 are the amplitudes of your dark resonance mode at BDSSRs and UDSSRs, respectively, and 1 and two are the damping in the dark resonance mode at BDSSRs and UDSSRs, respectively. The coupling coefficients amongst the two dark state modes and the vibrant state are 1 and 2 , respectively. Right after solving the Equatio.