Fig. 4: Design of the PHL profile based on hyperbolic van der Waals polaritons. | npj Nanophotonics

Fig. 4: Design of the PHL profile based on hyperbolic van der Waals polaritons.

From: Cosmology analogy for perfect hyperlens

Fig. 4

a Schematic of the three-dimensional α–MoO3 waveguide model with gradient thickness. b The relation between the thickness of α–MoO3 and the coordinate y. c, d are polaritonic wave patterns Ez on the top surface of α–MoO3, which are excited by the electric dipoles (stars) of the frequencies 673.5 cm−1 and 934.7 cm−1, respectively. Among them, the red dotted lines represent the expected images position x=jl/2.

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