Text this: An analog of double electromagnetically induced transparency with extremely high group indexes

 _    _     ______   ______      ___      _____   
| \  / ||  /_   _// |      \\   / _ \\   |__  //  
|  \/  ||   -| ||-  |  --  //  / //\ \\    / //   
| .  . ||   _| ||_  |  --  \\ |  ___  ||  / //__  
|_|\/|_||  /_____// |______// |_||  |_|| /_____|| 
`-`  `-`   `-----`  `------`  `-`   `-`  `-----`