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31 December 2022 All-optical modulation based on the phase-change materials combined with chains of silicon nanoantennas
Alisher Ibragimov, Vladislav Sitnianskii, Damir Yagudin, Alexander Shorokhov, Andrey Fedyanin
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Proceedings Volume PC12322, Nanophotonics, Micro/Nano Optics, and Plasmonics VIII; PC1232205 (2022) https://doi.org/10.1117/12.2642945
Event: SPIE/COS Photonics Asia, 2022, Online Only
Abstract
Chalcogenide phase-change materials are showing promise for the development of non-volatile memory and neuro-inspired computing technologies. One of the key issues in these devices is the energy consumption for the write (crystallization) and erase (amorphization) process. In this work, we propose to combine a PCM with a subwavelength chain of silicon nanoantennas with variable sizes following a parabolic profile. In comparison with a common slab waveguide, it was numerically demonstrated that the nanoparticle chain requires 24 times less energy for the writing and 42 times less energy for erasing process due to slow- light behavior near the photonic band-gap edge, which enhances local electromagnetic fields in the structure. Achieved results could be used for neuromorphic silicon photonics applications.
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Alisher Ibragimov, Vladislav Sitnianskii, Damir Yagudin, Alexander Shorokhov, and Andrey Fedyanin "All-optical modulation based on the phase-change materials combined with chains of silicon nanoantennas", Proc. SPIE PC12322, Nanophotonics, Micro/Nano Optics, and Plasmonics VIII, PC1232205 (31 December 2022); https://doi.org/10.1117/12.2642945
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KEYWORDS
Phase shift keying
Modulation
Nanoantennas
Silicon
Crystals
Nanoparticles
Photonic crystals
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