Fig. 2 The schematic illustration of the 1st- and 2nd-order relaxations. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Fig. 2 The schematic illustration of the 1st- and 2nd-order relaxations.

Caption

Fig. 2 The schematic illustration of the 1st- and 2nd-order relaxations. Each of the two resonance modes(Ⅰ: Magnetic resonance, Ⅱ: Electric resonance) has two distinct states, that is, reflections upon the upper and lower interfaces. The two states can be vividly analogous to the two wells in the double-well model and enable the 1st-order relaxation process under each resonance modes. Furthermore, the two resonance modes (at f1 and f2) again form a 2nd-order relaxation process, which spans a much wider frequency band compared with that of the 1st-order relaxation processes. By modifying the 2nd-order relaxation process induced by two resonances, the phase variation between f1 and f2 can be controlled, enabling dispersion engineering.

Credit

by Xinmin Fu, Yajuan Han, et al.

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