title: Tuning Photoluminescence Response by Electric Field in Electrically Soft Ferroelectrics.
abstract: We show that an electrically soft ferroelectric host can be used to tune the photoluminescence (PL) response of rare-earth emitter ions by external electric field. The proof of this concept is demonstrated by changing the PL response of the Eu^{3+} ion by electric field on a model system Eu-doped 0.94(Na_{1/2}Bi_{1/2}TiO_{3})-0.06(BaTiO_{3}). We also show that new channels of radiative transitions, forbidden otherwise, open up due to positional disorder in the system, which can as well be tuned by electric field.
authors.affiliation: Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India.
authors.forename: Dipak Kumar
authors.initials: DK
authors.lastname: Khatua
authors.affiliation: Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India.
authors.forename: Abhijeet
authors.initials: A
authors.lastname: Kalaskar
authors.affiliation: Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India.
authors.forename: Rajeev
authors.initials: R
authors.lastname: Ranjan