發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : “Plasmonics” in free space : observation of giant wavevectors, vortices, and energy backflow in superoscillatory optical fields