Recently, the Department of Optics and Optoelectronics, University of Science and Technology of China, Key Laboratory of Optoelectronics Science and Technology in Anhui Province, Minghai, Wang Pei, led by micro-nano optics and Technology Research Group Zhang Douguo and collaborative innovation Center for Energy Chemistry, College of Chemistry and Materials Science High Zou Gang, Professor of Molecular Science and Engineering, Center for Fluorescence Spectroscopy, School of Medicine, University of Maryland, USA R. Lakowicz, Southwestern University of Science and Technology, Ph.D., Ph.D. Chen Junxue proposed a new optical mode: the one-dimensional Bloch surface wave (BSW-1D) existing in multi-layer dielectric film and nanofiber composite structure, successfully solved by using this mode The technical problem that ultrafine polymer nanofiber can not transmit optical signals on conventional substrates. The research results to Bloch surface waves con? ned in one dimension with a single polymeric nano? bre, was published online February 3 in Nat. Commun. 8, 14330 doi: 10.1038 / ncomms14330 (2017). Doctoral students Wang Ruxu and Xia Hongyan co-writers co-author Zhang Douguo and Zou Gang.
It is well known that the tremendous achievements of micrometer-scale optical fibers have resulted in the highly developed Internet industry and the rapid "miniaturization" of the world. Therefore, the basic theory of micro-fiber won the 2009 Nobel Prize in Physics. Today, nanoscale optical fiber has become a hot research topic at the international frontier. Due to its good mechanical properties, especially its flexibility and flexibility, polymer nanofibers can be chemically modified to change the characteristics of their materials. This is one of the first choices for constructing ultra-compact photonic devices and miniaturizing integrated photonic circuits. However, its material is flexible and has a large aspect ratio. It must be placed on a substrate, such as common glass or silicon, so that it can be practically used to develop new types of nano-optical waveguide sensors. However, when the nano-fiber radius is very small, for example less than 125 nm, the nano-fiber placed on the glass will not be able to transmit optical signals.
In order to solve this problem, the research team used the well-designed multi-layer dielectric film with structural parameters to support the polymer nanofibers. With the photonic bandgap of the multi-layer thin film, the optical signal leakage in the nanofiber was prevented. Experimental results show that very thin nanofibers can transmit optical signals on the multi-layered dielectric film. The transmission mode is the newly discovered one-dimensional Bloch surface wave (BSW-1D) mode.
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