發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Influence of Er<sup>3+</sup>ion concentration on optical and photoluminescence properties of Er<sup>3+</sup>-doped gadolinium-calcium silica borate glasses