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SP dispersion curves of thin Ag (Au) film on GaN substrate with Ag (Au) film thicknesses of 40, 10, and 5 nm.
(a) SP dispersion curves and (b) Purcell factor as a function of energy for double-metallic Au/Ag layers on GaN substrate with Au/Ag layer thicknesses of 10 nm/10 nm , 5 nm/15 nm , 3 nm/17 nm , and 1 nm/19 nm . The corresponding SP dispersion curves and Purcell factors for Ag-only/GaN and Au-only/GaN are also plotted.
Electric field for double-metallic (a) Au (3 nm)/Ag (17 nm) and (b) Ag (3 nm)/Au (17 nm) layers on InGaN/GaN substrate.
(a) PL spectra comparison of InGaN QWs coated with Au (6 nm)/Ag (44 nm) and control sample (with no metal coating), and (b) the enhancement ratios of PL intensities of the InGaN QWs with metal coating and without metal coating as a function of the wavelength for various double-metallic Au/Ag layers thicknesses.
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