Experiment and modelling study of the modulation performance in the graphene-Si heterojunction waveguide

Feiying Sun; Changbin Nie; Liangping Xia; Jun Shen; Shaoyun Yin; Peng Wu; Chunlei Du

doi:10.1117/12.2517315

12 March 2019 Experiment and modelling study of the modulation performance in the graphene-Si heterojunction waveguide

Feiying Sun, Changbin Nie, Liangping Xia, Jun Shen, Shaoyun Yin, Peng Wu, Chunlei Du

Proceedings Volume 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application; 1102307 (2019) https://doi.org/10.1117/12.2517315
Event: Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 2018, Xi'an, China

Abstract

Graphene-Si heterojunction devices have been widely studied in the field of photoelectric detection, solar cells and sensors areas. However, optical modulation devices based on graphene-Si heterojunction have been rarely reported. Herein, we analyze the photoelectric performance of the graphene-Si heterojunction at different laser powers. The Fermi level of the graphene can be tuned as the photo-excited holes in Si diffuse into the graphene. For the hybrid Si-graphene waveguide modulator, the maximum modulation efficiency of 279.3 dB/cm is achieved at 1550 nm by using finite element analysis method. We hope that the study of the graphene-Si heterojunction can provide a way for application in hybrid graphene-Si waveguide modulators.

Citation Download Citation

Feiying Sun, Changbin Nie, Liangping Xia, Jun Shen, Shaoyun Yin, Peng Wu, and Chunlei Du "Experiment and modelling study of the modulation performance in the graphene-Si heterojunction waveguide", Proc. SPIE 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 1102307 (12 March 2019); https://doi.org/10.1117/12.2517315

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KEYWORDS

Graphene

Heterojunctions

Silicon

Modulation

Waveguides

Optical modulators

Optoelectronic devices

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