Fig. 4: The electric field profiles of the modes.
From: Full 2π tunable phase modulation using avoided crossing of resonances
The Ex field profiles for the points (i), (ii), (iii), and (iv) in Fig. 3. Pictures on the top show close-up views of the sections enclosed by white rectangles in the bottom pictures. a The electric field of point (i) showing a qBIC with a weak off-resonance graphene plasmon excitation decaying underneath the pillars. b A similar qBIC mode of point (ii), with a localized off-resonance graphene plasmon excited in between the pillars on the graphene ribbon. c The graphene plasmon mode \(({{{{{{\rm{GP}}}}}}}_{1})\) of point (iii) at the center of the unit cell. d The field of the secondary graphene plasmon \(({{{{{{\rm{GP}}}}}}}_{2})\) mode excited on the sides of the unit cell at point (iv).
