Journal
ADVANCED MATERIALS TECHNOLOGIES
Volume 5, Issue 4, Pages -Publisher
WILEY
DOI: 10.1002/admt.201901091
Keywords
efficient light-to-heat conversion; luminescent manometer and thermometer; optical sensors of pressure and temperature; thermalization of states; Yb3+ and Er3+ ions
Categories
Funding
- Polish National Science Centre [2016/23/D/ST4/00296, 2016/21/B/ST5/00110]
- Ministerio de Economia y Competitividad (MINECO) under the Spanish National Program of Materials [MAT2016-75586-C4-4-P]
- Agencia Canaria de Investigacion, Innovacion y Sociedad de la Informacion (ACIISI) [ProID2017010078]
- European Union through the European Social Fund under the Operational Program Knowledge Education Development
- EU-FEDER funds
- Bekker Programme scholarship - Polish National Agency for Academic Exchange
- [POWR.03.02.00-00-I023/17]
Ask authors/readers for more resources
Currently the lowest optically determinable pressure values are around 10(2) bar, making the pressure below inaccessible for optical detection. This work shows for the first time how to overcome these limitations, and optically monitor the low pressure values in a vacuum region (from approximate to 10(-5) to 10(-2) bar), utilizing the light-induced and pressure-governed heating-cooling of the material. Herein, the well-defined temperature dependency of the luminescence intensity ratio of the Er3+ thermally-coupled levels (TCLs), is used to monitor the elevation of local temperature of the upconverting material (YVO4:Yb3+-Er3+), induced by a NIR laser irradiation. The unprecedented enhancement (approximate to 20 times) of the laser-induced heating of the sample observed under vacuum conditions, is used to convert the luminescent thermometer into the remote vacuum sensor. The variations of pressure in the system are correlated with changes of the band intensity ratio (525/550 nm) of Er3+ TCLs, which are further applied for the remote, contactless vacuum sensing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available