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Near infrared and visible luminescence in transparent ( Er , Yb )-α-sialon ceramics under 980 nm laser irradiation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Joshi, Bhupendra Kshetri, Yuwaraj Khatri Gyawali, Gobinda Lee, Soo Wohn |
| Copyright Year | 2016 |
| Abstract | The novel Er and Yb doped transparent Sialon ceramics were fabricated by hot pressing sintering method as a near infrared (NIR) as well as visible luminescent material. The optical transmittance, down-conversion luminescence and NIR luminescence were investigated. The samples show around 30% transmittance in visible region whereas 70% in IR region around 3000 nm. The samples were excited within the range of 350-400 nm wavelength, the highest emission was in green region (~ 550 nm). Also, the upconversion luminescence depending upon the thicknesses of the samples in the green and red region have been investigated. The NIR luminescence was observed around 1524 nm wavelength under 980 nm wavelength irradiation. The decay time profiles have been investigated for higher Er concentration and higher Yb co-doped with Er α-Sialon samples. In this study, the addition of Yb has poor sensitizing effect on Er ion to enhance the luminescence. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://jcpr.kbs-lab.co.kr/file/JCPR_vol.17_2016/JCPR17-3/13.2015-106_197-201.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |