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Transmissive silicon photonic dichroic filters with spectrally selective waveguides
Name
s41467-018-05287-1.pdf
Description
Published version
Size
2.72 MB
Format
Adobe PDF
Checksum (MD5)
8b83f136329b55923df0372d50b921f6
Author(s)
Magden, Emir Salih
Li, Nanxi
Raval, Manan
Poulton, Christopher V
Ruocco, Alfonso
Singh, Neetesh
Vermeulen, Diedrik
Ippen, Erich P
Kolodziejski, Leslie A
Watts, Michael R
Date Issued
2018
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Version
Final published version
Abstract
© 2018, The Author(s). Many optical systems require broadband filters with sharp roll-offs for efficiently splitting or combining light across wide spectra. While free space dichroic filters can provide broadband selectivity, on-chip integration of these high-performance filters is crucial for the scalability of photonic applications in multi-octave interferometry, spectroscopy, and wideband wavelength-division multiplexing. Here we present the theory, design, and experimental characterization of integrated, transmissive, 1 × 2 port dichroic filters using spectrally selective waveguides. Mode evolution through adiabatic transitions in the demonstrated filters allows for single cutoff and flat-top responses with low insertion losses and octave-wide simulated bandwidths. Filters with cutoffs around 1550 and 2100 nm are fabricated on a silicon-on-insulator platform with standard complementary metal-oxide-semiconductor processes. A filter roll-off of 2.82 dB nm−1 is achieved while maintaining ultra-broadband operation. This new class of nanophotonic dichroic filters can lead to new paradigms in on-chip communications, sensing, imaging, optical synthesis, and display applications.
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
10.1038/S41467-018-05287-1
