| All-optical switching using graphene |
| Paper ID : 1158-UFGNSM-FULL |
| Authors: |
|
Mohsen Heidari *1, Vahid Ahmadi2, Mohammad Karimi2, Babak Janjan2 114115-116 2Department of Electrical and computer engineering,Tarbiat Modares University Tehran, Iran |
| Abstract: |
| Faraday rotation is a magneto-optic phenomenon used in various optical devices such as optical isolators, circulators and optical switches. Recently, it was shown that graphene has a high magneto-optical activity in strong magnetic fields, which leads to a giant Faraday rotation in a single layer graphene in the THz regime. Here, we propose a graphene-based all-optical switch by manipulating Faraday rotation effect. The switching mechanism is based on rotation of the polarization of the light passing through the graphene. For a defined angle of Faraday rotation, the switch is on or off. In this work, a femtosecond laser pulse is exploited to control the amount of Faraday rotation of light polarization, which turns the switch on or off. Our proposed device is benefit to design all-optical switches and optical integrated circuits. The Faraday rotation phenomena in graphene is dependent on the carrier dynamics and landau-levels splitting. Our results revels that both the amount of Faraday rotation angle and the shifting of peak wavelength can be tuned based on pumped femtosecond laser pulses. Giant Faraday rotation and high Transmission can be simultaneously achieved, which is remarkable. We believe that the demonstrated all-optical switch is a potential candidate for future integrated optical circuits and magneto-Optical devices. |
| Keywords: |
| All-optical switch; Faraday rotation; graphene; Magneto_Optic effect |
| Status : Paper Accepted (Poster Presentation) |
