Loss spectra for d1 (a) 0.6, 0.8, 1.0 μm with the other parameters d2 = 0.8 μm, Λ = 2.0 μm, and d2 (b) 0.6, 0.8, 1.0 μm with the other parameters d1 = 0.8 μm, Λ = 2.0 μm. The resonance wavelength red shifts and the resonance loss is decreased as increasing d1 in panel (a), the resonance wavelength red shifts and the resonance loss is increased as increasing d2 in panel (b). |