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Proceedings Paper

Silicon-on-insulator-based photonic-crystal Mach-Zehnder interferometers
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Paper Abstract

Si nanophotonics is anticipated to play a critical role in the future ultra-compact system integration due to the maturity of sub-micron silicon complementary metal oxide semiconductor (CMOS) technology. Photonic crystals (PhCs) provide a promising platform for developing novel optoelectronic devices with significantly reduced device size and power consumption. The active control of photonic crystal waveguides (PCWs) incorporated in Mach-Zehnder interferometers has been investigated in this paper. We designed and fabricated a PCW based silicon thermo-optic (TO) switch operating at 1.55 μm. A novel device structure was proposed to enhance the heat exchange efficiency between the source and the active PCW region, which resulted in a faster switching time (< 20μs) compared with the conventional structure. The required π phase shift between the two arms of the MZI has been successfully achieved within an 80 μm interaction distance. The maximum modulation depth of 84% was demonstrated for switching power of 78mW. For high-speed applications, a p-i-n structure based PCW electro-optical (EO) MZI modulator was proposed. The transient performance of such a device was evaluated using a two-dimensional semiconductor device simulator MEDICI. The simulated structure demonstrated a great potential to realize high-speed ultra-compact Si modulators in the GHz region.

Paper Details

Date Published: 1 March 2006
PDF: 8 pages
Proc. SPIE 6128, Photonic Crystal Materials and Devices IV, 612815 (1 March 2006); doi: 10.1117/12.645287
Show Author Affiliations
Lanlan Gu, Univ. of Texas at Austin (United States)
Yongqiang Jiang, Univ. of Texas at Austin (United States)
Wei Jiang, Univ. of Texas at Austin (United States)
Omega Optics Inc. (United States)
Xiaonan Chen, Univ. of Texas at Austin (United States)
Jin H. Choi, Univ. of Texas at Austin (United States)
Ray T. Chen, Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 6128:
Photonic Crystal Materials and Devices IV
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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