Ultrasmall in-plane photonic crystal demultiplexers fabricated with photolithography

Yuta Ooka, Tomohiro Tetsumoto, Nurul Ashikin Binti Daud, Takasumi Tanabe

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


We demonstrate ultrasmall demultiplexers based on photolithographic photonic crystals. The footprint of the demultiplexers is 110 μm2 per channel. Our in-plane demultiplexers are clad with silica, which makes them stable and easy to integrate with other silicon photonic devices. We describe two types of demultiplexers with spacings of 136 and 267 GHz between channels for application to dense wavelength division multiplexing. Integrated titanium nitride heaters allow us to precisely control the channel wavelength. We report a 2.5 Gbps transmittance experiment with sufficiently small crosstalk and discuss ways of achieving even lower crosstalk between channels.

Original languageEnglish
Pages (from-to)1521-1528
Number of pages8
JournalOptics Express
Issue number2
Publication statusPublished - 2017 Jan 23

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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