Affiliation:
1. Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province
2. University of Washington
Abstract
We propose and simulate a compact (∼29.5 µm-long) nonvolatile polarization switch based on an asymmetric Sb2Se3-clad silicon photonic waveguide. The polarization state is switched between TM0 and TE0 mode by modifying the phase of nonvolatile Sb2Se3 between amorphous and crystalline. When the Sb2Se3 is amorphous, two-mode interference happens in the polarization-rotation section resulting in efficient TE0-TM0 conversion. On the other hand, when the material is in the crystalline state, there is little polarization conversion because the interference between the two hybridized modes is significantly suppressed, and both TE0 and TM0 modes go through the device without any change. The designed polarization switch has a high polarization extinction ratio of > 20 dB and an ultra-low excess loss of < 0.22 dB in the wavelength range of 1520-1585 nm for both TE0 and TM0 modes.
Funder
National Key Research and Development Program of China
Natural Science Foundation of Zhejiang Province
National Natural Science Foundation of China
Natural Science Foundation of Ningbo
3315 Innovation Team in Ningbo City
K. C. Wong Magna Fund in Ningbo University
Subject
Atomic and Molecular Physics, and Optics
Cited by
3 articles.
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