All-Optical Switch Based on Thermo-Optic Effect in Graphene-on- Si3N4 Structure

A high-performance Mach-Zehnder interferometer (MZI) based all-optical switch using graphene on silicon nitride (Si3N4) is proposed and simulated. Graphene absorbs pump power (λ = 980 nm) on Si3N4 waveguide, generating heat. The heat affects the Si3N4 waveguide, causing a change in its refractive in...

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Veröffentlicht in:Al-Nahrain journal for engineering sciences 2024-08, Vol.27 (2), p.199-206
Hauptverfasser: Hamodi, Hayder Maki, Fyath, Raad Sami
Format: Artikel
Sprache:eng
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Zusammenfassung:A high-performance Mach-Zehnder interferometer (MZI) based all-optical switch using graphene on silicon nitride (Si3N4) is proposed and simulated. Graphene absorbs pump power (λ = 980 nm) on Si3N4 waveguide, generating heat. The heat affects the Si3N4 waveguide, causing a change in its refractive index due to thermo-optic effect. By tuning the probe phase (λ = 1550 nm) in the Si3N4 arm with graphene on top, all optical switching can then be carried out. An extinction ratio ranges of 13-25 dB and pump power range 20-270 mW. These findings demonstrate that our suggested configuration offers a useful integrated part for the creation of effective all-optical control devices on the insulator platform with a quick switching rate. Moreover, the suggested design might be able to achieve a wide bandwidth by utilizing an integrated MZI structure.
ISSN:2521-9154
2521-9162
DOI:10.29194/NJES.27020199