Ultraviolet upconversion luminescence of Gd3+ from Ho3+ and Gd3+ codoped oxide ceramic induced by 532-nm CW laser excitation

✍ Scribed by Feng Qin; Yangdong Zheng; Ying Yu; Changbin Zheng; Pouran Sadat Tayebi; Zhiguo Zhang; Wenwu Cao

• Book ID: 103874930
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 845 KB
• Volume: 284
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2011.02.060

✦ Synopsis

Ultraviolet upconversion emissions around 314 nm from 6 P J states of Gd 3+ ions have been observed in Y 1.98 -x Gd x Ho 0.02 O 3 (x = 0.02, 0.10, 0.20, and 0.30) oxide ceramics under the excitation of a continuous-wave 532nm laser. We found that the energy transfer process from Ho 3+ to Gd 3+ plays an important role in populating the 6 P J states of Gd 3+ . The doping of Gd 3+ ions does not affect 5 G 4 and 5 G 5 states but only the 3 D 3 state of Ho 3+ . The emissions from 3 D 3 state decrease with the increase of Gd 3+ concentration. Power dependence curves and time-resolved spectra have been measured to identify the proposed upconversion mechanism.