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Schematic of an ITPC consisting of two kinds of ferroelectric media. The arrows represent the orientation of the spontaneous polarization. The blue arc represents that there is SPhP mode at the interface between ITPC and vacuum.
The calculated dielectric response curves of an ITPC. The solid line represents the real part of ε(ω), and the dashed line represents the imaginary part.
Dispersion relation (f-k curves) of an ITPC. Black lines represent thebulk polariton dispersion of the ITPC and red lines represent the SPhP. Solid lines represent the real parts, and dashed red lines represent the imaginary parts.
The electric field (E z) distribution of SPhP mode, herein f s = 529 MHz with α 1 = 2.9831 + 1.3377i m−1 and α 2 = 37.2906 − 14.0459i m−1. The interface of ITPC and vacuum is set at x = 0, left part represents ITPC and right part represents vacuum. The solid line represents real part of E z, the dashed line represents absolute value of E z. The illustration in the upper right corner depicts the E z distribution near x = 0 more clearly.
The propagation of SPhP, herein f s = 529 MHz with k SPhP = 11.4085 + 0.3498i m−1. The solid line represents real part of E z, the dashed line represents absolute value of E z.
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