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980nm¼¤·¢ÊôÓÚ¹²Õñ¼¤·¢£¨resonance excitation£©£¬ºÜ¶à¹¤×÷Ó÷ǹ²Õñ²¨³¤À´¼¤·¢¡£Äã¿ÉÒÔÈ¥ËÑÒ»ÏÂLuminescence-center-mediated excitation as the dominant Er sensitization mechanism in Er-doped silicon-rich SiO2 films, PR B, 76, 195419 (2007). ÆäÖеÚ4Ò³Ã÷È·½²µ½ÁËErµÄÁ½¸ö·Å¹â´ø£º
In addition to the LC- and NC-related emission bands
observed in Fig. 2, an Er3+-related signal is observed at
981 nm for XSE samples, corresponding to the transition
from the second excited state to the ground state of Er3+
4I11/2¡ú4I15/2. Figure 3 shows the near-infrared spectra for
the XSE samples under the same excitation conditions. A
clear Er3+-related emission spectrum peaking at 1535 nm is
observed, corresponding to the transition from the first excited
state to the ground state of Er3+ 4I13/2¡ú4I15/2.
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