Figure 3 (IMAGE)

The University of Hong Kong

Figure 3

Caption

Hyperbolic phonon polariton and elliptical phonon polariton propagation on α-MoO3 film. (a) AFM of an antenna placed on the α-MoO3 film. (b) Real frequency measurements of hyperbolic polariton in different real frequencies. (c) Complex frequency measurement provides an ultra-long distance propagation behavior. (d) AFM of two different spaced gold antennas. (e) The amplitude and real part of the measurements at real frequency f=990cm-1. (f) The amplitude and real part of measurements at complex frequency f=(990-2i)cm-1. 
(Figures adapted from Nature Materials, 2024, doi.org/10.1038/s41563-023-01787-8)

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The University of Hong Kong

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