Fig. 5: Experimental demonstrations of lineshape tailoring. | Light: Science & Applications

Fig. 5: Experimental demonstrations of lineshape tailoring.

From: Tailoring the lineshapes of coupled plasmonic systems based on a theory derived from first principles

Fig. 5

a Calculated interresonator coupling strength t as a function of the relative angle θ between two resonators with d fixed at 30 nm (see inset). Open squares represent six chosen systems experimentally tested. b Positions of the six chosen systems on the Δω ~ t phase diagram. The two original modes have fixed ΔΓ = 1.954 and Δω = 0.733. c Reflectance spectra of six systems obtained by our theory (lines), FEM simulations (open circles), and experimental measurements (solid triangles) on realistic samples, with SEM images shown in the right panels with scale bars (white lines) of 500 nm. The two dashed lines indicate the frequencies of the two dressed modes, and the red circle on the spectrum of sample 3 denotes the BIC. d Quality factor of the low-frequency dressed mode \(\tilde Q_ -\) as a function of the interresonator coupling t obtained by our theory (line), and retrieved from experimental spectra by fitting with CMT (rhombus). Δω, ΔΓ, and t are all scaled by \(\sqrt {{\Gamma} _1{\Gamma} _2}\)

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