| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Optical Isolation by Time-Dependent Sinusoidal-Shaped Structures |
| XU Ye-Long1, FENG Liang2, LU Ming-Hui1**, CHEN Yan-Feng1 |
1National Laboratory of Solid State Microstructures, and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093
2Department of Electrical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
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| Cite this article: |
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XU Ye-Long, FENG Liang, LU Ming-Hui et al 2013 Chin. Phys. Lett. 30 094202 |
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Abstract Design of nonmagnetic optical isolators integrated with silicon waveguides is important for rapidly growing silicon photonics in optical communications. We introduce a silicon waveguide consisting of an array of complex sinusoidal-shaped structures that create the designed time-dependent modulation of refractive indices. These time-dependent sinusoidal-shaped structures are engineered to have in-phase mode conversion only in one direction, thus leading to asymmetric optical mode conversion in the silicon waveguide and one-way light transmission with high contrast ratios, confirmed by numerically simulated field maps and calculated transmission at the wavelength of 1550 nm. Our design may offer another practical design to the compact chip-scale optical isolators in silicon waveguides.
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Received: 03 May 2013
Published: 21 November 2013
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| PACS: |
42.79.Gn
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(Optical waveguides and couplers)
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42.79.Nv
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(Optical frequency converters)
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42.82.Et
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(Waveguides, couplers, and arrays)
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