Figure 5
Control of plasmonic phase shift.
(a) Plasmonic phase shift δϕ according to the detuning of the frequency ν from the resonance frequency ν0 in the waveguide side-coupled to the resonator with different distances d = 20 nm (red squares), d = 30 nm (blue pentagons) and d = 40 nm (black circles). The red, blue and black solid lines are the results calculated by Eq. (7). The gain coefficients are selected appropriately to satisfy the condition (γg − γ0)/γe = 1. Other parameters are same as in Fig. 2. (b) Plasmonic phase shift according to the gain coefficient g21 in the waveguide side-coupled to the resonator with the distance d = 20 nm.
