Ravets S, Hoffman J E, Orozco L A, Rolston S L, Beadie G, Fatemi F K
Joint Quantum Institute, Department of Physics, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA.
Opt Express. 2013 Jul 29;21(15):18325-35. doi: 10.1364/OE.21.018325.
Optical nanofibers confine light to subwavelength scales, and are of interest for the design, integration, and interconnection of nanophotonic devices. Here we demonstrate high transmission (> 97%) of the first family of excited modes through a 350 nm radius fiber, by appropriate choice of the fiber and precise control of the taper geometry. We can design the nanofibers so that these modes propagate with most of their energy outside the waist region. We also present an optical setup for selectively launching these modes with less than 1% fundamental mode contamination. Our experimental results are in good agreement with simulations of the propagation. Multimode optical nanofibers expand the photonic toolbox, and may aid in the realization of a fully integrated nanoscale device for communication science, laser science or other sensing applications.
光学纳米纤维将光限制在亚波长尺度，对于纳米光子器件的设计、集成和互连具有重要意义。在此，我们通过适当选择光纤并精确控制锥形几何形状，证明了第一类激发模式通过半径为350 nm的光纤具有高传输率（> 97%）。我们可以设计纳米纤维，使这些模式在其大部分能量在腰部区域之外传播。我们还展示了一种光学装置，用于以低于1%的基模污染选择性地发射这些模式。我们的实验结果与传播模拟结果吻合良好。多模光学纳米纤维扩展了光子工具箱，并可能有助于实现用于通信科学、激光科学或其他传感应用的完全集成纳米级器件。
