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All-Optical Control of a Single Resonance in a Graphene-On-Silicon Nanobeam Cavity Using Thermo-Optic Effect
Guo, Tao1; Gao, Sai1; Zeng, Huiying1; Tang, Linlong2; Qiu, Ciyuan1
2021-07-15
摘要We propose and demonstrate on-chip all-optical control of a single resonance in a graphene-on-silicon nanobeam cavity using thermo-optic (TO) effect. In the design, the graphene sheet covered on the nanobeam cavity is patterned in a "U" shape, which enables the device to maintain a constant quality factor and a high extinction ratio (ER) after graphene transfer. Benefiting from the ultra-small optical mode volume of the nanobeam cavity and the high thermal conductivity of graphene, efficient all-optical control of a single resonance is implemented with a tuning efficiency of 0.0346 nm/mW. All-optical switching is also demonstrated with a switching power of 47 mW at a high ER of similar to 16 dB. Moreover, the 10%-90% switching times are 3.24 mu s and 5.52 mu s for the rising edge and the falling edge, respectively. Such graphene-assisted device potentially could be a good candidate to realize efficient on-chip all-optical control of an individual resonance with a high ER.
关键词Graphene Optical waveguides Heating systems Optical crosstalk Tuning Silicon System-on-chip All-optical control graphene nanobeam cavity thermo-optic effect
DOI10.1109/JLT.2021.3077559
发表期刊JOURNAL OF LIGHTWAVE TECHNOLOGY
ISSN0733-8724
卷号39期号:14页码:4710-4716
通讯作者Qiu, Ciyuan(qiuciyuan@sjtu.edu.cn)
收录类别SCI
WOS记录号WOS:000673513100018
语种英语