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Stimulated emission depletion (STED) is a very important technique in super-resolution microscopy. Until now, while autofocusing Airy beam (AAB) has been an attractive theme for both theoretical and applied researches, there are almost no report on AABs being used in STED microscopy. In this paper, we propose a novel STED microscopy based on AABs. A radially symmetric 3/2 phase plate is involved to...
It is revealed that the phase-shift and polarization properties of laser beam reflected from a photonic crystal (PC) are sensitive to the surface-layer thickness of the PC. A continuous variation of λ/4 in surface-layer thickness produces a continuous change of π in the phase-shift. Besides, in the case of an asymmetric coupled-defect PC, various polarization patterns including linearly polarization...
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