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Acousto-optic couplings in two-dimensional phoxonic crystal cavities
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View: Figures


Image of FIG. 1.
FIG. 1.

Eigenfrequencies of the six acoustic cavity modes in the band structure and the maps of their displacement fields in the x-y plane. For each cavity mode, the blue arrows indicate the displacement field vector for specific spatial positions in the silicon cavity.

Image of FIG. 2.
FIG. 2.

Eigenfrequencies of the TM optical cavity modes and the maps of their magnetic field Hz .

Image of FIG. 3.
FIG. 3.

Modulations of the TM modes α, β, and γ frequencies by the acoustic modes B and F. The figures present the oscillations of the α (upper panels) and β, γ (lower panels) modes as a function of Ωt during one period of the acoustic mode. The left and right panels give respectively the results for the B and F acoustic modes. The red-solid curves represent the end results when both interaction mechanisms are taken into consideration while blue-dashed and green-dashed-dotted lines stand respectively for opto-mechanic and photo-elastic effects acting alone. In the lower panels, thin and thick lines differentiate the two degenerate modes β and γ.

Image of FIG. 4.
FIG. 4.

Spatial distribution of the total in-plane acoustic displacement in the cavity for modes B and F, respectively, at Ωt = π/2 in a 7 × 7 supercell. To illustrate the opto-mechanical effect, the structure deformation has been oversized in the entire domain. The background represents the unperturbed structure.

Image of FIG. 5.
FIG. 5.

Maps of the magnetic fields for the hybrid modes β′ and γ′ in presence of the perturbation introduced by the acoustic mode B at Ωt = π/2.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Acousto-optic couplings in two-dimensional phoxonic crystal cavities