We experimentally demonstrate ultra-low-loss waveguide crossing arrays showing loss down to 0.04dB/crossing. They rely on a low loss, focusing Bloch wave that is stabilized by radiative scattering, via a radiative form of coupling.
© 2013 OSA
Y. Liu, J. M. Shainline, X. Zeng, and M. Popovic, "Ultra-low-loss Waveguide Crossing Arrays Based on Imaginary Coupling of Multimode Bloch Waves," in Advanced Photonics 2013, H. Chang, V. Tolstikhin, T. Krauss, and M. Watts, eds., OSA Technical Digest (online) (Optical Society of America, 2013), paper IM1A.4.
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