非对称辐射成形光纤尖端产生的光子钩形手术刀概念
Concept of photonic hook scalpel generated by shaped fiber tip with asymmetric radiation
摘要：
结构光对现代生物技术和临床实践产生了深远的影响，目前许多光学系统和激光器被用于医学治疗疾病。我们展示了一个新的概念，基于光纤的光学钩手术刀。在非对称辐射的成形光纤尖端附近获得了亚波长光子钩。需要通常用于医学成像的1550 nm连续波源。利用半球形光纤尖端和金属掩模实现了横向特征尺寸小于半波长的光子钩。这一突破是在环境空气中使用直径4 μ m、具有成形尖端的光纤实现的。计算得到的光子钩的强度分布与针尖尺寸之间有很好的相关性。利用成形光纤尖端产生的光子钩更容易操作，对于诸如眼科激光手术、超分辨率显微镜、光刻和材料加工等潜在应用显示出深远的益处。
英文摘要：
Structured light have made deep impacts on modern biotechnology and clinical practice, with numerous optical systems and lasers currently being used in medicine to treat disease. We demonstrate a new concept of fiber-based optical hook scalpel. The subwavelength photonic hook is obtained in the vicinity of a shaped fiber tip with asymmetric radiation. A 1550 nm continuous-wave source, commonly used for medical imaging, has been required. Photonic hook with a lateral feature size less than the half-wavelength is achieved using a hemispherical shaped fiber tip with metallic mask. This breakthrough is carried out in ambient air by using a 4-μm-diameter fiber with a shaped tip. A good correlation is observed between the computed intensity distribution of photonic hook and the tip sizes. Photonic hook generated with a shaped fiber tip, easier to manipulate, shows far-reaching benefits for potential applications such as ophthalmic laser surgery, super-resolution microscopy, photolithography, and material processing.
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