How does hyperbolic polaritonic propagation on molybdenum trioxide?
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Hyperbolic polaritonic propagation on molybdenum trioxide (α-MoO3) exhibits unique characteristics due to its in-plane hyperbolicity, wavelength compression, and ultra-long lifetime. Sample suspension can further enhance these properties by elongating the wavelength of hyperbolic phonon polaritons (HPPs) and increasing their propagation length significantly. Additionally, the directional propagation of polaritons in α-MoO3 can be steered along previously forbidden directions by inducing an optical topological transition, leading to the emergence of low-loss exotic intermediate polaritonic states. Furthermore, the exploitation of hyperbolic phonon polaritons (HP2) in low-dimensional α-MoO3 nanobelts demonstrates strong electromagnetic field confinement, ultraslow group velocities, and anisotropic propagation dependent on the frequency range. Twisting the angle between stacked α-MoO3 layers can further tune the anisotropic hyperbolic phonon polaritons, enabling a topological transition and control of light-matter interactions at the nanoscale in the mid-infrared region.
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| Papers (5) | Insight |
|---|---|
| Hyperbolic phonon polaritons in twisted double-layers of MoO3 exhibit tunable propagation by twisting the layers, transitioning from open to closed dispersion contours, and further modulated by an external magnetic field. | |
Open access•Posted Content | Hyperbolic phonon polaritons propagate anisotropically on α-MoO3 nanobelts, exhibiting Fabry-Perot resonances in mid- to far-IR ranges, as observed through real-space nanoimaging and supported by theory. |
Open access•Posted Content | Hyperbolic phonon polaritons on molybdenum trioxide can be steered along forbidden directions via an optical topological transition induced by placing the slab on a specific substrate. |
| Hyperbolic phonon polaritons on suspended α-MoO3 exhibit elongated wavelengths and increased propagation lengths, with both positive and negative phase velocities, enhancing potential for nano-polaritonic applications. | |
Open access•Posted Content | Hyperbolic phonon polaritons in α-MoO3 exhibit broad-range propagation with various modes and Reststrahlen bands, controllable by swift electron direction, enabling applications in nanophotonics and optoelectronics. |
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