Ultra-compact right-angle curved waveguide optical modulator based on vanadium dioxide

Qipeng Zhan; Haibin Pang; Junneng Liao; Xingang Ren; Zongming Duan; Zhixiang Huang; Li Ding

doi:10.1117/12.2653150

15 December 2022 Ultra-compact right-angle curved waveguide optical modulator based on vanadium dioxide

Qipeng Zhan, Haibin Pang, Junneng Liao, Xingang Ren, Zongming Duan, Zhixiang Huang, Li Ding

Proceedings Volume 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022); 124781B (2022) https://doi.org/10.1117/12.2653150
Event: Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 2022, Xi'an, China

Abstract

Optical modulators with high modulating efficiency and nanoscale size are essential components of photonic communication networks. In recent years, optical modulators based on phase-change materials have considerable application prospects. However, it is still challenging to solve the problem that the footprint and modulation performance of modulators cannot be taken into account at the same time. To this end, we propose an ultra-compact right-angle curved waveguide optical modulator design based on vanadium dioxide (VO₂), which consists of a high-loss right-angle curved waveguide and a rectangular VO₂ embedded in its bend. Since VO₂ has two stable phases of metal phase and semiconductor phase, there is a difference in its optical performance: when VO₂ is in the semiconductor phase, its light transmission is low due to the high bending loss of the right-angle bending waveguide; When VO₂ is in the metal phase, a mirror-like structure is formed at the bending of the right-angle waveguide, which significantly increases the output of the right-angle curved waveguide. The optical modulator with a footprint of 0.6μm×0.6μm has an extinction ratio of 8.6 dB operating at a wavelength of 1550 nm in transverse electric (TE) mode. Our design can achieve a high extinction ratio with high efficiency in an extremely small footprint, with great potential in constructing on-chip fast all-optical communication networks.

Citation Download Citation

Qipeng Zhan, Haibin Pang, Junneng Liao, Xingang Ren, Zongming Duan, Zhixiang Huang, and Li Ding "Ultra-compact right-angle curved waveguide optical modulator based on vanadium dioxide", Proc. SPIE 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 124781B (15 December 2022); https://doi.org/10.1117/12.2653150

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KEYWORDS

Modulation

Waveguides

Phase shift keying

Optical modulators

Vanadium

Modulators

Silicon

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