أرسل هذا في رسالة قصيرة: Space-time nonseparable pulses : constructing isodiffracting donut pulses from plane waves and single-cycle pulses

  _____      ___      _  __    _____    _____    
 / ____||   / _ \\   | |/ //  |  ___|| |  __ \\  
/ //---`'  | / \ ||  | ' //   | ||__   | |  \ || 
\ \\___    | \_/ ||  | . \\   | ||__   | |__/ || 
 \_____||   \___//   |_|\_\\  |_____|| |_____//  
  `----`    `---`    `-` --`  `-----`   -----`