發送短信 : Upconversion luminescence study of Er<sup>3+</sup>in Gadolinium-Calcium-Silicoborate glasses

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