Detect the sub-wavelength data by applying avery-small-aperture laser

作者：Qiaoqiang Gan, Guofeng Song, Guoliang Yang, Yinsheng Li, Ling Chen · 发表于：Laser Physics Letters · 年份：2005 · DOI：10.1002/lapl.200510076 · 被引用次数：3 · 研究领域：Near-Field Optical Microscopy、Plasmonic and Surface Plasmon Research、Photonic and Optical Devices

We present a theoretical and experimental research about applying a very-small-aperture laser (VSAL) to detect sub-wavelength data. Near-field distribution of a VSAL, which is essential for the application of such near-field devices, will be affected by the sample or fiber posited in the near-field region of the aperture. When the device is applied to detect the sub-wavelength data, the real resolution depends on the near-field spot size, the divergent angle of the beam and the distance from the aperture to the sample. Experimental results, including the near-field detection of the spot and detection of the sub-wavelength data by using the VSAL, are presented in this paper. We realize the two dimensional scanning about the sub-wavelength data (with the width 600 nm) by employing a VSAL with a 300 nm×300 nm aperture.