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Third‐Order Nonlinear Optical Response‐Driven Upconversion Phosphors
Author(s) -
Viswanath Noolu Srinivasa Manikanta,
Cho Jeong Bin,
Byun Hye Ryung,
Han Joo Hyeong,
Unithrattil Sanjith,
Jang Joon Ik,
Ok Kang Min,
Im Won Bin
Publication year - 2021
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202100549
Subject(s) - photon upconversion , materials science , activator (genetics) , absorption (acoustics) , ion , spectroscopy , luminescence , optoelectronics , chemistry , physics , organic chemistry , biochemistry , quantum mechanics , composite material , gene
Abstract A series of silicate materials with noncentrosymmetric structures, namely, Na 3 ScSi 3 O 9 (NSSO), NSSO:Ce 3+ , NSSO:Eu 2+ , and NSSO:Tb 3+ , have been successfully synthesized by a microwave‐assisted solid‐state reaction. The materials reveal interesting second‐ and third‐harmonic generation and two‐photon absorption (2PA) properties attributable to the unusual connectivity and unique coordination environments around the cations, as evidenced by detailed structural analysis and maximum entropy method calculations. Upon irradiation with 980 nm laser light, the activator‐doped NSSO materials show an unusual upconversion emission property without using Yb 3+ sensitizer ions, because of nonlinear absorption processes, as evidenced from 2PA spectroscopy results. The materials also show good chemical stability compared to NaYF 4 :Er 3+ , Yb 3+ . The findings of this work can stimulate the creation of a new scientific field devoted to upconversion luminescence in solid‐state materials.