Sorin Fabien, Lestoquoy Guillaume, Danto Sylvain, Joannopoulos John D, Fink Yoel
Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge MA 02139, USA.
Opt Express. 2010 Nov 8;18(23):24264-75. doi: 10.1364/OE.18.024264.
Photodetecting fibers of arbitrary length with internal metal, semiconductor and insulator domains have recently been demonstrated. These semiconductor devices exhibit a continuous translational symmetry which presents challenges to the extraction of spatially resolved information. Here, we overcome this seemingly fundamental limitation and achieve the detection and spatial localization of a single incident optical beam at sub-centimeter resolution, along a one-meter fiber section. Using an approach that breaks the axial symmetry through the constuction of a convex electrical potential along the fiber axis, we demonstrate the full reconstruction of an arbitrary rectangular optical wave profile. Finally, the localization of up to three points of illumination simultaneously incident on a photodetecting fiber is achieved.
最近已证明存在具有内部金属、半导体和绝缘体区域的任意长度的光探测纤维。这些半导体器件表现出连续的平移对称性，这给提取空间分辨信息带来了挑战。在这里，我们克服了这一看似基本的限制，沿着一米长的光纤段，以亚厘米分辨率实现了对单个入射光束的检测和空间定位。通过沿着光纤轴构建凸电势来打破轴对称性的方法，我们展示了任意矩形光波轮廓的完全重建。最后，实现了同时入射在光探测纤维上的多达三个照明点的定位。
