Mode-Selective Absorption and All-Optical Control Between Two Transverse Modes on Silicon-on-Insulator
Mode-selective absorption is realized by designing the ridge waveguide structure on silicon-on-insulator combined with two metal titanium (Ti) strips located on the two waveguide edges. The TE<sub>1</sub> mode can be much easier to permeate the waveguide edges by designing the waveguide...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8704339/ |
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| Summary: | Mode-selective absorption is realized by designing the ridge waveguide structure on silicon-on-insulator combined with two metal titanium (Ti) strips located on the two waveguide edges. The TE<sub>1</sub> mode can be much easier to permeate the waveguide edges by designing the waveguide structure carefully. Therefore, the overlap between the TE<sub>0</sub> and TE<sub>1</sub> modes is reduced in the cross section and then the TE<sub>1</sub> mode can be absorbed selectively by Ti strips. According to the opto-thermal effect, the refractive index of the waveguide will increase when the temperature rises. As a result, this waveguide structure can achieve all-optical control between two transverse modes with compact structure and low power consumption. As an example, a novel all-optical switch based on the proposed waveguide structure and Bragg grating was designed and numerically studied. We think the proposed structure may give a new way for all-optical control between two transverse modes, especially for the applications in the integrated mode division multiplexing systems. |
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| ISSN: | 1943-0655 |