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We demonstrate a dual-beam-reflection phenomenon for a Gaussian beam illuminating at a Kretschmann configuration composed of a photonic-crystal-made prism and a dielectric waveguide. One reflection beam has a positive shift and the other has a negative shift. The finite-difference time-domain (FDTD) shows that the specific phenomenon takes place only when the corresponding quasi-guided mode supported...
According to the change of refractive index of Sb thin film with temperature and the radial distribution of temperature within the spot, we consider the dynamic optical aperture as a self-focusing thermal lens of Sb thin film in super-resolution near-field structure of SiN/Sb/SiN, and obtain the radius of the dynamic optical aperture (self-focusing thermal lens) 80 nm, the focusing length 22.5 nm,...
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