Indexed by:期刊论文

Date of Publication:2018-01-01

Journal:JOURNAL OF COLLOID AND INTERFACE SCIENCE

Included Journals:SCIE、EI、PubMed

Volume:509

Page Number:318-326

ISSN No.:0021-9797

Key Words:Photonic crystal heterostructure; Photonic stopband; Stopband regulation rule; Multi-stopbands; Ultra-wide stopband; Fluorescence enhancement

Abstract:In this paper, we present a general fabrication strategy to achieve the structure control and the flexible photonic stop band regulation of (2 + 1) D photonic crystal heterostructures (PCHs) by layer-by-layer depositing the annealed colloidal crystal monolayers of different sphere size. The optical properties of the resulting (2 + 1) D PCHs with different lattice constants were systematically studied and a universal photonic stopband variation rule was proposed, which makes it possible to program any kind of stopband structure as required, such as dual- or multi-stopbands PCH and ultra-wide stopband PCH. Furthermore, PCH with dual-stopbands overlapping the excitation wavelength (E) and emission wavelength(F) of Ru complex was fabricated by finely manipulating the spheres' diameter of colloidal monolayers. And an additional 2-fold fluorescence enhancement in comparison to that on the single stopband sample was achieved. This strategy affords new opportunities for delicate engineering the photonic behaviour of PCH, and also is of great significance for the practical application based on their bandgap property. (C) 2017 Elsevier Inc. All rights reserved.