Text this: Variable Bessel Beam Profiles Generated through Refraction by Liquid Media

 _    _    _    _                ___    __    __  
| |  | || | || | ||     ___     / _ \\  \ \\ / // 
| |/\| || | || | ||    /   ||  | / \ ||  \ \/ //  
|  /\  || | \\_/ ||   | [] ||  | \_/ ||   \  //   
|_// \_||  \____//     \__ ||   \___//     \//    
`-`   `-`   `---`       -|_||   `---`       `     
                         `-`