Year: 2022
Type: article
Abstract: We numerically investigated the use of graphene nanoribbons placed on top of silicon-on-insulator (SOI) strip waveguides for light polarization control in silicon photonic-integrated waveguides. We found that two factors mainly affected the polarization control: the graphene chemical potential and the geometrical parameters of the waveguide, such as the waveguide and nanoribbon widths and distance. We show that the graphene chemical potential influences both TE and TM polarizations almost in the same way, while the waveguide width tapering enables both TE-pass and TM-pass polarizing functionalities. Overall, by increasing the oxide spacer thickness between the silicon waveguide and the top graphene layer, the device insertion losses can be reduced, while preserving a high polarization extinction ratio.
Source: Materials
DOI: 10.3390/ma15248739
Authors: Simone Cammarata, Andrea Fontana, Ali Emre Kaplan, Samuele Cornia, Thu Ha Dao, Cosimo Lacava, Valeria Demontis, Simone Iadanza, Valerio Vitali, Fabio De Matteis, Elena Pedreschi, Guido Magazzù, Alessandra Toncelli, Franco Spinella, Sergio Saponara, Roberto Gunnella, Francesco Rossella, Andrea Salamon, Vittorio Bellani
Institutions: University of Pisa, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, University of Pavia, University of Modena and Reggio Emilia, University of Rome Tor Vergata, Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata, Scuola Normale Superiore, Istituto Nanoscienze, National Enterprise for NanoScience and NanoTechnology, Munster Technological University, Tyndall National Institute, University of Southampton, Università di Camerino, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
Language: English
Topic: Photonic and Optical Devices
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,408
Awards: G3690828678, G5201910539, G5403916644
OpenAlex ID: W4311858263