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Unidirectional couplers are those which only coupler the incident wave i.e. the wave given as input. Unidirectional coupling, in a system of two coupled oscillators, represents the limit when one of the oscillator oscillates while the other remains at equilibrium, e.g. does not move. This corresponds to the limit of one of the mass becoming infinite, in the case of mass-spring oscillators, or one of the strings becoming of infinite length, for pendulums.
Perimeter-variable one-way coupling topology photon cavity based on scatterer
PendingCN122018061Avariable circumferenceControllable coupling directionOptical elementsSoftware engineeringUnidirectional coupling
The invention discloses a scatterer-based one-way coupling topology photon cavity with variable perimeter. The device comprises a shielding case, and an electrospinning continuous medium layer and an air layer which have a chiral surface state at the junction of the shielding case and the electrospinning continuous medium layer; a cylindrical rotary electric continuous medium is also distributed in the air layer, and a first scatterer of an isotropic medium exists between the cylindrical rotary electric continuous medium and an interface where the chiral surface state is located; and air exists at the junction of the first scatterer and the cylindrical rotating electric continuous medium and the chiral surface state. The one-way coupling topological photon cavity with the variable perimeter gets rid of dependence on strict periodic conditions, and can realize a one-way coupling effect under the condition of photon cavities with different perimeters. While the scattering suppression transmission characteristic of the chiral boundary state is realized, the unidirectional coupling between the chiral boundary state and the scatterer is closely related to the direction of an external magnetic field in the rotary electric continuous medium. Furthermore, by changing the radius size and the magnetic field direction of the photon cavity, the one-way coupling topology photon cavity with variable perimeter and controllable coupling direction is realized.
Owner:CHINA JILIANG UNIV +1