In addition, the accumulated propagation phase shifts within the structure are almost insignificant since the total thickness of the Ge and TiO 2 films is much thinner than the incident wavelength, which is also responsible for the angle-robust broadband absorption performance of our designed device. 4.
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Angle-Insensitive Ultrathin Broadband Visible Absorber Based on Dielectric-Semiconductor-Lossy Metal Film Stacks.
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