Coupling Characteristics between Two Identical Microfibers or Nanofibers in Different Ambient Refractive Indices
In this paper, we investigate theoretically the coupling characteristics of two identical microfibers or nanofibers (MNFs) with different ambient refractive indices. The results show that, compared with weakly coupled waveguides, coupled two MNFs can provide a much smaller coupling length without sacrificing high coupling efficiency. This feature is helpful for studying and developing microphotonic or nanophotonic devices with MNFs.
P. H. Wu et al., "Coupling Characteristics between Two Identical Microfibers or Nanofibers in Different Ambient Refractive Indices", Advanced Materials Research, Vol. 465, pp. 172-177, 2012