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Proceedings Paper

Two-dimensional beam steering device using double periodic Si photonic crystal waveguide
Author(s): Hiroshi Abe; Moe Takeuchi; Goro Takeuchi; Hiroyuki Ito; Tomoki Yokokawa; Keisuke Kondo; Yuya Furukado; Toshihiko Baba
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Paper Abstract

We demonstrate a non-mechanical on-chip optical beam steering device using the photonic crystal waveguide with a double periodic structure that repeats the increase and decrease of hole diameter. Guided slow light in this waveguide is radiated to be a light beam. Slow light shows strong dispersion, which allows a deflection angle of approximately 10 times that of a normal diffraction grating. We fabricated the device using complementary metal oxide semiconductor process and observed a beam deflection angle of 24° in the longitudinal direction with maintaining the divergence angle of 0.3° when the wavelength was changed by 27 nm. Four such waveguides were integrated, and one of them was selected by a Mach-Zehnder optical switch. Then, the lateral beam steering was obtained when a cylindrical lens was placed above these waveguides. By combining the longitudinal and lateral beam steering, the collimated beam was scanned two-dimensionally with 80 × 4 resolution points.

Paper Details

Date Published: 23 March 2018
PDF: 6 pages
Proc. SPIE 10541, Photonic and Phononic Properties of Engineered Nanostructures VIII, 105410P (23 March 2018); doi: 10.1117/12.2290954
Show Author Affiliations
Hiroshi Abe, Yokohama National Univ. (Japan)
Moe Takeuchi, Yokohama National Univ. (Japan)
Goro Takeuchi, Yokohama National Univ. (Japan)
Hiroyuki Ito, Yokohama National Univ. (Japan)
Tomoki Yokokawa, Yokohama National Univ. (Japan)
Keisuke Kondo, Yokohama National Univ. (Japan)
Yuya Furukado, Yokohama National Univ. (Japan)
Toshihiko Baba, Yokohama National Univ. (Japan)

Published in SPIE Proceedings Vol. 10541:
Photonic and Phononic Properties of Engineered Nanostructures VIII
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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