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Jian Wang, Jing Ouyang, Leo T. Varghese, Li Fan, Yi Xuan and Minghao Qi A Hollow-Core Optical Cavity Built in a Three-Layer Silicon Photonic Crystal Advanced Optical Materials 1

Version of Record online: 19 JUL 2013 | DOI: 10.1002/adom.201300208

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Strong 3D optical confinement in a three-layer silicon structure is shown. A missing row of rods with engineered rods in its neighboring rows traps light within the horizontal plane, and two capping layers of air–hole slabs localize the light vertically. A resulting hollow cavity concentrates 67% of the mode energy in air, and allows the detection of a refractive index change ≈8.8×10−6.

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