Detection of phase transitions in RbTiOPO4 and KTiOPO4 by luminescence

Kannan C., Kurt K., Vaitianathan V., Ganasamoorthy S., Ramasamy P., Townsend P.

JOURNAL OF PHYSICS-CONDENSED MATTER, cilt.15, sa.44, ss.7599-7609, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 44
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1088/0953-8984/15/44/013
  • Dergi Adı: JOURNAL OF PHYSICS-CONDENSED MATTER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.7599-7609
  • Çukurova Üniversitesi Adresli: Hayır

Özet

Luminescence signals have been recorded at low temperature during thermal cycling of crystals of RbTiOPO4 (RTP) and KTiOPO4 (KTP) excited by x-rays. In both crystals there are well resolved intense intensity spikes and changes in emission spectra consistent with first-order phase transitions. The transitions are not reversible, except by high temperature annealing. The observations imply that new phases of RTP and KTP can be formed, and in some cases these may relate to nanoparticle-size inclusions. Crystal quality assessment from the luminescence behaviour may have value for non-linear optics. Cathodoluminescence of the RTP surface reveals different emission spectra from the bulk material with consequent implications for usage in surface waveguide devices.