Polarization Dependent Loss and All-Optical Modulation in Graphene on Suspended Membrane Waveguides
Optics
2012-11-27 v1
Abstract
We observe a strong polarization dependent optical loss of in-plane light propagation in silicon waveguide due to the presence of graphene. Both transverse-electric (TE) and transverse-magnetic (TM) modes are efficiently (~3 dB) coupled to the graphene on suspended membrane waveguides using an apodized focusing subwavelength grating. The TE mode has 7.7 dB less excess optical loss than the TM mode at 1.5 {\mu}m for a 150 {\mu}m long waveguide in good agreement with a theoretical model. All-optical modulation of light is demonstrated. There is also a large thermally induced change in waveguide effective index because of optical absorption in graphene.
Keywords
Cite
@article{arxiv.1211.5946,
title = {Polarization Dependent Loss and All-Optical Modulation in Graphene on Suspended Membrane Waveguides},
author = {Zhenzhou Cheng and Hon Ki Tsang and Xiaomu Wang and Chi Yan Wong and Xia Chen and Ke Xu and Zerui Shi and Jian-Bin Xu},
journal= {arXiv preprint arXiv:1211.5946},
year = {2012}
}
Comments
16 pages, 6 figures