Journal
ACS PHOTONICS
Volume 5, Issue 2, Pages 301-305Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.7b00987
Keywords
silicon photonics; optical devices; beamsplitter; nanophotonic optimization
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Funding
- AFOSR MURI for Aperiodic Silicon Photonics [FA9550-15-1-0335]
- Gordon and Betty Moore Foundation
- GlobalFoundries Inc.
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In wavelength division multiplexing schemes, splitters must be used to combine and separate different wavelengths. Conventional splitters are fairly large with footprints in hundreds to thousands of square microns, and experimentally demonstrated multimode-interference-based and inverse-designed ultracompact splitters operate with only two channels and large channel spacing (>100 nm). Here we inverse design and experimentally demonstrate a three-channel wavelength demultiplexer with 40 nm spacing (1500, 1540, and 1580 nm) with a footprint of 24.75 mu m(2). The splitter has a simulated peak insertion loss of -1.55 dB with under -15 dB crosstalk and a measured peak insertion loss of -2.29 dB with under -10.7 dB crosstalk.
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