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. 2021 Feb 13;176:580–591. doi: 10.1016/j.carbon.2021.02.051

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Fig. 5 — The PER spectrum in dB units showing the efficiency of circular polarization conversion for (a) various values of chemical potential ( $μ_{c}$ ), (b) various values of electron mobility (μ). Polarization Extinction Ratio (PER) under oblique incidence angles for (c) TE and (d) TM conditions.