Table 1 Comparison of \({\Theta _{\min }}\) and \({T_{\max }}\) of different single-unit cell systems.

From: A superior coherent perfect absorber and laser constructed from the periodic ring optical waveguide network based on extremum spontaneous PT-symmetric breaking points

Systems

\({\Theta _{\min }}\)

\({T_{\max }}\)

Determined by \({{n_{\mathrm{{I}}1}} = 1.5447 \times {{10}^{ - 8}}}\)

\(3.1914 \times {10^{ - 16}}\)

\(1.5667 \times {10^{15}}\)

Determined by \({{n_{\mathrm{{I}}2}} = 9.5557 \times {{10}^{ - 6}}}\)

\(4.1493 \times {10^{ - 14}}\)

\(1.2053 \times {10^{13}}\)

Determined by \({{n_{\mathrm{{I}}3}} = 2.1837 \times {{10}^{ - 8}}}\)

\(4.7413 \times {10^{ - 16}}\)

\(1.0546 \times {10^{15}}\)

Determined by \({n_{\mathrm{{Imag}}} = 0.2}\)

0.8395

1.0428