Table 2 Comparison of \({\Theta _{\min }}\), \({T_{\max }}\), and \(\nu\), which are for the systems optimized by the first extremum breaking point with N as the number of unit cells.

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

NO.

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

\({T_{\max }}\)

\(\nu\) (THz)

1

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

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

193.522877689455

2

\(5.6886 \times {10^{ - 15}}\)

\(8.7895 \times {10^{ 13}}\)

193.522879555607

3

\(3.0456 \times {10^{ - 14}}\)

\(1.6417 \times {10^{ 13}}\)

193.522881421759

4

\(9.9347 \times {10^{ - 14}}\)

\(5.0329 \times {10^{ 12}}\)

193.522883287911

5

\(2.4520 \times {10^{ - 13}}\)

\(2.0391 \times {10^{ 12}}\)

193.522885154063

6

\(5.0395 \times {10^{ - 13}}\)

\(9.9217 \times {10^{ 11}}\)

193.522887020215