Group-index independent coupling to band engineered SOI photonic crystal waveguide with large slow-down factor | Zendy

Somayyeh Rahimi | Zendy; Amir Hosseini | Zendy; Xiaochuan Xu | Zendy; Harish Subbaraman | Zendy; Ray T. Chen | Zendy

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Group-index independent coupling to band engineered SOI photonic crystal waveguide with large slow-down factor

Author(s) -

Somayyeh Rahimi,

Amir Hosseini,

Xiaochuan Xu,

Harish Subbaraman,

Ray T. Chen

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.021832

Subject(s) - silicon on insulator , optics , slow light , materials science , photonic crystal , interferometry , cladding (metalworking) , optoelectronics , waveguide , refractive index , photonic integrated circuit , bandwidth (computing) , silicon , physics , telecommunications , metallurgy , computer science

Group-index independent coupling to a silicon-on-insulator (SOI) based band-engineered photonic crystal (PCW) waveguide is presented. A single hole size is used for designing both the PCW coupler and the band-engineered PCW to improve fabrication yield. Efficiency of several types of PCW couplers is numerically investigated. An on-chip integrated Fourier transform spectral interferometry device is used to experimentally determine the group-index while excluding the effect of the couplers. A low-loss, low-dispersion slow light transmission over 18 nm bandwidth under the silica light line with a group index of 26.5 is demonstrated, that corresponds to the largest slow-down factor of 0.31 ever demonstrated for a PCW with oxide bottom cladding.

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