Acta Chimica Sinica ›› 1999, Vol. 57 ›› Issue (8): 901-906. Previous Articles     Next Articles

Original Articles

掺稀土多孔硅中稀土光学活化的新方法: 微波热法

石建新;石建新;田峻;田峻;龚孟濂;周建英;蔡少华;杨燕生   

  1. 中山大学化学与化工学院;中山大学超快速激光光谱学国家重点实验室
  • 出版日期:1999-08-15 发布日期:1999-08-15

A novel approach for optical activation of rare earths in rare earth- doped porous sillicon: microwave heating method

Shi Jianxin;Shi Jianxin;Tian Jun;Tian Jun;Gong Menglian;Zhou Jianying;Cai Shaohua;Yang Yansheng   

  • Online:1999-08-15 Published:1999-08-15

A novel approach for the optical activation of rare earths in rare earth-doped porous silicon (PS:RE), microwave heating method,was first reported. The effects of sample-placement mods and microwave heating time on the room-temperature photoluminescence in the infrared region for PS:Er and PS:Nd, prepared with constant-potenial electrochemical doping,were investigated.The heated samples were observed to be homogeneous in appearance and to emit imtense room- temperature photoluminescence around 1.54μm and 1.60μm, which are assigned to the intrashell 4f-4f transitions of Er^3^+ ions (^4I~1~3~/~2--^4I~1~5~/~2) and Nd^3^+ ions(^4F~3~/~2--^4I~1~1~/~2), respectively. In addition to the thermal activation,the non-thermal interaction of microwave radiation with PS:RE, mainly the spread of rare earths and the trapping of oxygen with rare earths in the pofous layer, is considered to play an important role in the optical activation of RE^3^+ ions.

Key words: POROUS SILICON, RARE EARTH, ERBIUM, DOPE, PHOTOLUMINESCENCE, MICROWAVE HEATING

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