Subwavelength photonic hook generated by shaped fiber tip with asymmetric terahertz radiation

Igor V. Minin D.D.S.; Oleg V. Minin D.D.S.; Yan-Yu Liu M.D.; Cheng-Yang Liu

doi:10.1117/12.2579807

17 November 2020 Subwavelength photonic hook generated by shaped fiber tip with asymmetric terahertz radiation

Igor V. Minin D.D.S., Oleg V. Minin D.D.S., Yan-Yu Liu M.D., Cheng-Yang Liu

Proceedings Volume 11582, Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications; 115820E (2020) https://doi.org/10.1117/12.2579807
Event: Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications, 2020, Tomsk, Russian Federation

Abstract

We demonstrate the concept of fiber-based terahertz hook. The subwavelength photonic hook is obtained in the vicinity of a shaped fiber tip with asymmetric radiation. A 193 THz 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 2.58λ - diameter fiber with a shaped tip (λ is a radiation wavelength). 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.

Citation Download Citation

Igor V. Minin D.D.S., Oleg V. Minin D.D.S., Yan-Yu Liu M.D., and Cheng-Yang Liu "Subwavelength photonic hook generated by shaped fiber tip with asymmetric terahertz radiation", Proc. SPIE 11582, Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications, 115820E (17 November 2020); https://doi.org/10.1117/12.2579807

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