Schematic diagram of a 2D photonic crystal layer on a quartz glass substrate, with a lattice constant , a nanorod height , and a filling ratio .
Top view FE-SEM images of 2D photonic crystal layers with (a) various lattice constants : 300, 400, 500, 600, and 700 nm and (b) various filling ratios : 0.1, 0.2, 0.3, 0.4, and 0.5. Scale bar: .
Cross-sectional view FE-SEM images of 2D photonic crystal layers with various PC heights : (a) 100, (b) 200, (c) 310, and (d) 420 nm. Scale bar: 500 nm.
Cross-sectional and top view FE-SEM images of as-grown thin films on (a) a flat quartz substrate and (b) a quartz substrate modified with a 2D PC array (lattice constant: 600 nm, height: 200 nm, filling ratio: 0.2). Scale bar: .
Plots of the measured extraction efficiency of emitted light for as-grown and post-annealed thin films relative to those of flat samples as functions of (a) the lattice constant, (b) the height, and (c) the filling ratio.
X-ray diffraction patterns of (a) as-grown and (b) post-annealed thin-film phosphors on conventional quartz and 2D PCL assisted quartz substrates (, , ).
Integrated photoluminescence spectra of (a) as-grown and (b) post-annealed thin-film phosphors on conventional quartz and 2D PCL assisted quartz substrates (, , ).
Top view FE-SEM images of post-annealed thin-film phosphors at on (a) a conventional quartz substrate and (b) a 2D photonic crystal layer (, , ). Scale bar: .
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