Double inverse nanotapers for efficient light coupling to integrated photonic devices

• DOI: 10.1364/ol.43.003200
• Publication Date: 2018-06-29T13:39:16Z
• Authors: Junqiu Liu; Arslan S. Raja; Martin H. P. Pfei...; Clemens Herkommer; Hairun Guo; Michael Zervas; Michael Geiselmann; Tobias J. Kippenberg
• Keywords: Integrated Optics

Efficient light coupling to integrated photonic devices is of key importance a wide variety applications. "Inverse nanotapers" are widely used, in which the waveguide width reduced match an incident mode. Here, we demonstrate novel "double inverse" tapers, reduce both height and width. We >45% chip-through efficiency for transverse electric magnetic polarizations Si3N4 tapers >500 nm width, comparison regular inverse that necessitate <100 The double show polarization-independent allow fabrication using photolithography, relevant applications at near-infrared visible wavelengths, e.g., supercontinuum soliton microcomb generation.