AI Article Synopsis
- The study simulates endface output patterns of micro/nanofibers (MNFs) using a 3D-FDTD method, focusing on silica and tellurite fibers with various endface shapes.
- Results indicate that subwavelength-diameter MNFs can produce highly confined output beams in the near field, with adjustable beam widths based on the fiber diameter and light wavelength.
- Shaped endfaces of MNFs significantly influence light behavior at the ends, differing from standard fibers in terms of reflection and focus, providing insights for future applications of these specialized materials.
Article Abstract
Endface output patterns of micro/nanofibers (MNFs) are simulated using a Three-Dimension Finite-Difference Time-Domain (3D-FDTD) method. The intensity distribution and beam widths of near- or farfield output patterns of freestanding silica and tellurite MNFs with flat, angled, spherical and tapered endfaces in air and/or water are obtained. It shows that, for a subwavelength-diameter MNF, highly confined output beam can be obtained in the near field, and the beam width can be tuned by the ratio of fiber diameter and light wavelength with a minimum width smaller than the wavelength. Meanwhile, MNFs with shaped endfaces behave differently from standard fibers in reflection, redirection and focus of light beam at the endfaces. These results may offer valuable references for practical evaluation and application of terminated MNFs with wavelength- or subwavelength-scale endfaces.
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| http://dx.doi.org/10.1364/oe.16.008887 | DOI Listing |
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