Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7906360 | Optical Materials | 2018 | 4 Pages |
Abstract
We present an optical pressure sensor KMgF3:Eu2+ suitable for experiments in diamond anvil cell (DAC), which we have calibrated against the ruby reference sensor at pressures ranging from atmospheric up to 30â¯GPa (300â¯kbar), at room temperature. The emission spectra of KMgF3:Eu2+ consist of one prominent emission line related to the 6P7/2â¯ââ¯8S7/2 electronic transition (zero phonon line) accompanied by weak phonon sidebands. The energy of emission at atmospheric pressure was determined to be 27846â¯Â±â¯7â¯cmâ1. The edge of the excitation spectrum lies at wavelength around 325â¯nm (30800â¯cmâ1) making it suitable to excite with He-Cd laser (325â¯nm). The sensor exhibits linear pressure shift of rate equal to â0.815â¯Â±â¯0.007â¯cmâ1/kbar at pressures up to 300â¯kbar. The pressure shift of the emission is totally reversible and the pressure sensor is suitable for multi cycle pressure experiments. The sensor's exceptional feature is that excitation and emission spectra lie in near UV, which makes it very convenient to use in high pressure optical measurements in visible and IR region with no interference from the sensor's luminescence.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Justyna Barzowska, Tadeusz Lesniewski, Sebastian Mahlik, Hyo Jin Seo, Marek Grinberg,