15 January 2008 Near-field intensity distribution from a bow-tie aperture VCSEL with its polarization state improved
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A micro-aperture vertical-cavity surface-emitting laser (VCSEL) is a kind of active nanophotonics devices. It can confine the optical near-field to a nanometric light spot of high intensity. The confinement effect is usually implemented by a round aperture. A bow-tie aperture can do it better if the incident light polarizes along the line between its ridges. However, a conventional VCSEL does not have a definite polarization state, so a bow-tie aperture VCSEL is very difficult to be implemented. In order to solver this problem, a rectangular aperture array is employed to improve the polarization state. Two bow-tie aperture VCSELs with and without their polarization state improved are fabricated. Their near-field intensity distribution is measured and compared. The measurement results demonstrate that the near-field intensity is enhanced dramatically when the polarization state is improved. So the confinement and enhancement effect of a bow-tie aperture can be obtained on the basis of a micro-aperture VCSEL.
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Hongfeng Gai, Hongfeng Gai, Jia Wang, Jia Wang, Qian Tian, Qian Tian, Wei Xia, Wei Xia, Xiangang Xu, Xiangang Xu, } "Near-field intensity distribution from a bow-tie aperture VCSEL with its polarization state improved", Proc. SPIE 6831, Nanophotonics, Nanostructure, and Nanometrology II, 683106 (15 January 2008); doi: 10.1117/12.784937; https://doi.org/10.1117/12.784937

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