發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Intense terahertz emission from undoped GaAs/n-type GaAs and InAs/AlSb structures grown on Si substrates in the transmission-geometry excitation