Abstract

We present a graphene-on-silicon (GoS) suspended vertical slot waveguide. By changing the Fermi level of graphene, the variation in the effective refractive index (RI) of the waveguide is a factor of two larger than that in the traditional GoS rib waveguide. The improvement is due to the light-intensity enhancement and the poor confinement of the optical mode in the slot nanostructure. We design Mach–Zehnder interferometer (MZI) and microring modulators based on the GoS suspended vertical slot waveguide. Our calculations show that the modulators can be energy-efficient and footprint-compact due to the large phase shift of the propagating mode in the waveguide after applying a gate voltage on the graphene. Fabrication of our design is easy and CMOS-compatible. It paves the way for chip-integrated electronic-RI modulators.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Nanoscale electro-optic modulators based on graphene-slot waveguides

Zhaolin Lu and Wangshi Zhao
J. Opt. Soc. Am. B 29(6) 1490-1496 (2012)

Low-chirp high-extinction-ratio modulator based on graphene–silicon waveguide

Longzhi Yang, Ting Hu, Ran Hao, Chen Qiu, Chao Xu, Hui Yu, Yang Xu, Xiaoqing Jiang, Yubo Li, and Jianyi Yang
Opt. Lett. 38(14) 2512-2515 (2013)

Graphene-based optical phase modulation of waveguide transverse electric modes

Michele Midrio, Paola Galli, Marco Romagnoli, Lionel C. Kimerling, and Jurgen Michel
Photon. Res. 2(3) A34-A40 (2014)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (7)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription