15 March 2013 Demonstration of a slow-light high-contrast metastructure cage waveguide
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Proceedings Volume 8633, High Contrast Metastructures II; 863305 (2013) https://doi.org/10.1117/12.2002071
Event: SPIE OPTO, 2013, San Francisco, California, United States
We have developed a new type of Si-based 3D cage-like high-contrast metastructure waveguide with both “slow-light” and low-loss properties, which has applications in providing a long time-delay line or a high Q cavity in chip-scale optoelectronic integrated circuits (OEIC). Traditional semiconductor optical waveguides always have high loss when used in a high dispersion (slow-light) region. A preliminary computational model has predicted that there is a slow-light and low propagation loss region within cage-like hollow-core waveguide formed by 4 high-contrast-gratings walls/claddings. Using our new processing technique, we fabricated several such waveguides on a Si wafer with different core sizes/shapes and different HCGs for 1550 operation wavelength. We have conducted experimental waveguide delay test measurements using a short optical pulse which indicate that the group velocity of these metastructure waveguides are in the range of 20- 30% of the speed of the light. Using a waveguide “cut-back” method, we have experimentally determined the propagation loss of these waveguides are in the range of 2-5dB/cm. We are also developing this type of high-contrast metastructure hollow-core waveguide for different operating wavelength/frequency such as THz for different applications.
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Weimin Zhou, Weimin Zhou, Gerard Dang, Gerard Dang, Monica Taysing-Lara, Monica Taysing-Lara, Connie Chang-Hansnain, Connie Chang-Hansnain, } "Demonstration of a slow-light high-contrast metastructure cage waveguide", Proc. SPIE 8633, High Contrast Metastructures II, 863305 (15 March 2013); doi: 10.1117/12.2002071; https://doi.org/10.1117/12.2002071

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