Graphene-Based Polarization-Independent Mid-Infrared Electro-Absorption Modulator Integrated in a Chalcogenide Glass Waveguide

A polarization-insensitive graphene-based mid-infrared optical modulator is presented that comprised SiO(2)/ Ge(23)Sb(7)S(70), in which two graphene layers are embedded with a semiellipse layout to support transverse magnetic (TM) and transverse electric (TE) polarizing modes with identical absorpti...

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Detalles Bibliográficos
Autores principales: Zhou, Yong, Lu, Rongguo, Wang, Guangbiao, Lyu, Jiangbo, Tan, Meng, Shen, Liming, Lin, Rui, Yang, Zhonghua, Liu, Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2021
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8106561/
https://www.ncbi.nlm.nih.gov/pubmed/33963953
http://dx.doi.org/10.1186/s11671-021-03538-7
Descripción
Sumario:A polarization-insensitive graphene-based mid-infrared optical modulator is presented that comprised SiO(2)/ Ge(23)Sb(7)S(70), in which two graphene layers are embedded with a semiellipse layout to support transverse magnetic (TM) and transverse electric (TE) polarizing modes with identical absorption. The key performance index for the polarization independent modulator is polarization-sensitivity loss (PSL). The waveguide of our device just supports basic TE and TM modes, and the PSL between two modes is of < 0.24 dB. The model can offer extinction ratio (ER) more than 16 dB and insertion loss less than 1 dB. The operation spectrum ranges from 2 to 2.4 μm with optical bandwidth of 400 nm. The 3 dB modulation bandwidth is as high as 136 GHz based on theoretical calculation.

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