Compact resonant electro-optic modulator using randomness of a photonic crystal waveguide

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

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We fabricate and demonstrate an electro-optic modulator that utilizes the randomness in a photonic crystal waveguide. We exploit a way of using random photonic crystals for device application that involves restricting the area influenced by the randomness. Our random photonic crystal waveguide is in a diffusive regime and the confinement of light is observed only for a W0.98 waveguide (98% of the original width) placed between W1.05 photonic crystal waveguides, where we obtained a transmittance spectrum with an ultra-high Q of 2.4 × 105. A numerical investigation revealed that the experimental yield rate of the appearance of the high-Q confined mode is larger than 80%, by properly designing the length of W0.98. Since the confinement location is predictable, we integrate a p-i-n structure and demonstrate a GHz electro-optic modulation.

Original languageEnglish
Pages (from-to)11199-11207
Number of pages9
JournalOptics Express
Issue number10
Publication statusPublished - 2016 May 16

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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