Title :
Upconversion Emission Modification and White Light Generation in NaYF 4:Yb 3+, Er 3+, Tm 3+ Nanocrystals/Opal Photonic Crystal Composites
Author :
Yang, Z.W. ; Wang, Y.D. ; Liao, J.Y. ; Yang, J.Z. ; Qiu, J.B. ; Song, Z.G.
Author_Institution :
Coll. of Mater. Sci. & Eng., Kunming Univ. of Sci. & Technol., Kunming, China
Abstract :
In this paper, we fabricated NaYF 4:Yb3+, Er3+, Tm3+ nanocrystal/opal photonic crystal composites by depositing NaYF 4:Yb3+, Er3+, Tm3+ nanocrystals on the surface of opal photonic crystals, and we investigated the influence of photonic bandgaps on upconversion (UC) emission properties of NaYF 4:Yb3+, Er3+, Tm 3+ nanocrystals. When the photonic bandgaps overlapped with the UC emission bands of NaYF 4:Yb3+, Er3+, Tm3+ nanocrystals on the opal photonic crystal surfaces, the suppression or enhancement of UC emissions was observed due to the Bragg reflection effect of photonic crystal, resulting in the modification of red, green, and blue UC emissions. Thus, white UC emission was realized.
Keywords :
composite materials; erbium; nanostructured materials; photoluminescence; photonic band gap; photonic crystals; sodium compounds; thulium; ytterbium; yttrium compounds; Bragg reflection effect; NaYF4:Yb3+,Er3+,Tm3+; blue UC emission; green UC emission; nanocrystal/opal photonic crystal composites; photonic bandgaps; red UC emission; upconversion emission modification; white UC emission; white light generation; Erbium; Nanocrystals; Optical imaging; Optical variables measurement; Photonic band gap; Yttrium; Optical materials; luminescence; photonic crystal; surface properties;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2500886
