Details

Autor(en) / Beteiligte

• Muench, Jakob E
• Ruocco, Alfonso
• Giambra, Marco A
• Miseikis, Vaidotas
• Zhang, Dengke
• Wang, Junjia
• Watson, Hannah F. Y
• Park, Gyeong C
• Akhavan, Shahab
• Sorianello, Vito
• Midrio, Michele
• Tomadin, Andrea
• Coletti, Camilla
• Romagnoli, Marco
• Ferrari, Andrea C
• Goykhman, Ilya

Titel

Waveguide-Integrated, Plasmonic Enhanced Graphene Photodetectors

Ist Teil von

• Nano letters, 2019-11, Vol.19 (11), p.7632-7644

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present a micrometer-scale, on-chip integrated, plasmonic enhanced graphene photodetector (GPD) for telecom wavelengths operating at zero dark current. The GPD is designed to directly generate a photovoltage by the photothermoelectric effect. It is made of chemical vapor deposited single layer graphene, and has an external responsivity ∼12.2 V/W with a 3 dB bandwidth ∼42 GHz. We utilize Au split-gates to electrostatically create a p-n-junction and simultaneously guide a surface plasmon polariton gap-mode. This increases the light–graphene interaction and optical absorption and results in an increased electronic temperature and steeper temperature gradient across the GPD channel. This paves the way to compact, on-chip integrated, power-efficient graphene based photodetectors for receivers in tele- and datacom modules.