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Polaritons in an artificial ionic-type crystal made of two-dimensional periodically inversed multi-domain ferroelectric crystals
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10.1063/1.3554831
/content/aip/journal/jap/109/6/10.1063/1.3554831
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/6/10.1063/1.3554831
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Schematic diagram of the 2D periodic poled LiTaO3 square lattice. The cylinders represent the negative domain and the other area the positive domain. The lower left and right schematic show the modulation of piezoelectric coefficients in the x-y plane and the experiment sample (etched in hydrofluoric) respectively. (b) The quasi-phase-matched condition at ω a. The lines from inside to the outside represent the quasilongitudinal mode and quasitransverse mode respectively. Points 1 to 4 stand for the four intersections between the reciprocal lattice and slowness curves. (c) The measured real part of dielectric function (above) and calculated dielectric function ɛ± (ω) (below) ranging from 400MHz to 1.3 GHz. (d) The measured real part of dielectric function and calculated dielectric functions ɛ± (ω) in details around the frequency of ωa.

Image of FIG. 2.
FIG. 2.

(Color online) Calculated polariton dispersion curves of (a) real part and (b) imaginary part. The square and triangle dot lines correspond to the real part of k+ and k, respectively. The solid and hollow dot lines correspond to the imaginary part of k+ and k, respectively. (c) The polariton dispersion curves near frequency 755 MHz. (d) Rotation angles, the frequency ωa denotes the point of mode conversion.

Image of FIG. 3.
FIG. 3.

(Color online) The distributions of acoustic fields at ωa projected on (a,d) the original x-axis, (b,e) the original y‐axis, and (c,f) the z-axis. E+ and E- represent the two AC electric fields applied along the new prime x’- and y’- axes respectively. The white circles denote the domain boundaries.

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/content/aip/journal/jap/109/6/10.1063/1.3554831
2011-03-28
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polaritons in an artificial ionic-type crystal made of two-dimensional periodically inversed multi-domain ferroelectric crystals
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/6/10.1063/1.3554831
10.1063/1.3554831
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