Photor&fleatanae of GaAs doping superlattices has been measured at 300K.The spectra exhibi,te features cowesponding to spatially direct transitions due to quantized electron or hole states.We demonstrate the utili...Photor&fleatanae of GaAs doping superlattices has been measured at 300K.The spectra exhibi,te features cowesponding to spatially direct transitions due to quantized electron or hole states.We demonstrate the utility of the photoreflectance technique for studying quantum size effects tn doping superlattices.展开更多
A novel method, sputtering K9 glass film, is proposed to solve the surface corrosion of Er-doped phosphate glass during ion-exchange processing for optical waveguide fabrication. The corrosion causes are analyzed to b...A novel method, sputtering K9 glass film, is proposed to solve the surface corrosion of Er-doped phosphate glass during ion-exchange processing for optical waveguide fabrication. The corrosion causes are analyzed to be the intrinsically weak stabilization of phosphate glass structure, hydrophile and weakly acidic property of phosphate radical. Experimental results show that the K9 glass film could not only protect the Er-doped phosphate glass surface from being corroded but also give no influence on the waveguide fabrication. The effect of thickness of K9 glass film on the optical property of waveguide is also investigated and the op- timal thickness is found to be 60―80 nm. It provides a good base for further fabri- cation of active phosphate glass optical waveguide devices.展开更多
文摘Photor&fleatanae of GaAs doping superlattices has been measured at 300K.The spectra exhibi,te features cowesponding to spatially direct transitions due to quantized electron or hole states.We demonstrate the utility of the photoreflectance technique for studying quantum size effects tn doping superlattices.
基金the Optical Science and Technology Foundation of Shanghai Technology Committee (Grant No. 022261009)the Young Teacher Cultivation Foundation of Dalian University of Technology (Grant No. 893210)the Doctor Startup Foundation of Dalian University of Tech-nology (Grant No. 893322)
文摘A novel method, sputtering K9 glass film, is proposed to solve the surface corrosion of Er-doped phosphate glass during ion-exchange processing for optical waveguide fabrication. The corrosion causes are analyzed to be the intrinsically weak stabilization of phosphate glass structure, hydrophile and weakly acidic property of phosphate radical. Experimental results show that the K9 glass film could not only protect the Er-doped phosphate glass surface from being corroded but also give no influence on the waveguide fabrication. The effect of thickness of K9 glass film on the optical property of waveguide is also investigated and the op- timal thickness is found to be 60―80 nm. It provides a good base for further fabri- cation of active phosphate glass optical waveguide devices.
