Enhancement of the luminescent and optical properties of ceramic Ce:GAGG after surface treatment with phosphoric acid

Chansun Park, Sangsu Kim, Wonhi Lee, Chanho Kim, Shinhaeng Cho, Jung Yeol Yeom

Research output: Contribution to journalArticlepeer-review

Abstract

Surface modification of ceramic Ce-doped Gd3Al2Ga3O1212 (Ce:GAGG) was performed by exposing small samples to anhydrous phosphoric acid (H3PO4) under different conditions (temperature and duration) to investigate the effects of chemical polishing treatment. When coupled to a photomultiplier tube (PMT) and used as a radiation detector, chemical treatment for 3 min at 190 °C improved the light (signal) output by 24.8% and energy resolution by 2.5% (percentage point), respectively. This can be attributed to a reduction in surface roughness that enhanced optical properties. Thus, chemical polishing could be a low-cost alternative to mechanical polishing especially for small or complex shaped ceramic scintillators.

Original languageEnglish
Pages (from-to)751-760
Number of pages10
JournalOptics Express
Volume29
Issue number2
DOIs
Publication statusPublished - 2021 Jan 18

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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