Table 1.

Absorption in Si and Ag at various wavelengths, for 2 µm thick Si with either a rear 20 nm spacer layer and Ag mirror, or including 200 nm or 675 nm diameter nanospheres (800 nm period) in the Ag.

Wavelength [nm]	Absorption in Si (%)			Absorption in Ag (%)
	Mirror only	With 200 nm Nanospheres	With 675 nm Nanospheres	Mirror only	With 200 nm Nanospheres	With 600 nm Nanospheres
565	52.3	52.6	52.7 (E)	0.1	0.1	1.5
700	24.1	25.6	44 (D)	0.2	0.3	4.5
780	41.1	50.1	56.5 (C)	0.9	1.2	3.1
875	5.9	7.7	9.2 (B)	0.3	0.6	7.8
1050	1.3	1.7	20.2 (B→A)	0.5	0.7	4.6

Despite increased absorption losses in the Ag, the 675 nm NSs provide a much greater enhancement to absorption in Si. These wavelengths were selected as they correspond to peaks in absorption for the 675 nm case, but not for the 200 nm case as well as the midpoint between resonances B → A. Each absorption in Si is labelled with the resonance it corresponds to.