PURPOSE: A waveguide-integrated graphene photo-detector is provided to improve a light absorption rate and the sensitivity of a photo-detector by forming graphene in the center of the photo-detection part. CONSTITUTION: An oxide layer(112) is formed on a substrate(110). A waveguide(120) is ...
1. A photodetector comprising: a waveguide on a substrate; and a photodetection portion configured to receive light incident on the waveguide, the photodetection portion including, a first semiconductor layer contacting the waveguide, a graphene on the first semiconductor layer, and a second semiconduct...
Silicon-integrated graphene photodetectors exhibit promising bandwidths at telecom wavelengths, but their responsivity is usually limited. Here, the authors report the wafer-scale fabrication of waveguide-integrated detectors based on twisted bilayer graphene, showing responsivities up to 0.65 A/W and...
Here, we demonstrate a waveguide-integrated graphene photodetector that simultaneously exhibits high responsivity, high speed and broad spectral bandwidth. Using a metal-doped graphene junction coupled evanescently to the waveguide, the detector achieves a photoresponsivity exceeding 0.1 AW(-1) together ...
When operating at 1.55μm, the present photodetector also works very well with a broad 3dB bandwidth of >40GHz (setup-limited) and a high responsivity of ~0.4A/W even with a low bias voltage of -0.3V. This work paves the way for achieving high-responsivity and high-speed silicon-...
The waveguide-integrated GPD with symmetric electrodes is adopted as an ultrafast self-differential photodetector (SDPD), instead of conventional balanced-photodetectors (BPDs) based on p-i-n photodiodes in a coherent receiver. By placing two sysmmetric interdigitated electrodes of the SDPD at ...
26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 From the Director The Graphene Flagship sets sail for new horizons Graphene and 2D materials in photonics: A revolutionary leap in technology SPEARHEAD PROJECTS 2D EXPERIMENTAL PILOT LINE ...
Here, the authors demonstrate a photo-thermo-electric graphene photodetector integrated on a Si waveguide featuring 105 Gbit s1 non-return to zero and 120 Gbit s1 4-level pulse amplitude modulation direct detection. 展开 关键词: PULSE amplitude modulation OPTICAL communications GRAPHENE OPTICAL ...
a Cross section and top view of the designed PTE graphene photodetector. The active region is the first layer of graphene: the channel (red) of length L and width W, on top of the 480 nm × 220 nm Si waveguide (blue, light blue is SiO2). The channel is accessed electrically...
et al. Controlled generation of a pn-junction in a waveguide integrated graphene photodetector. Nano Lett. 16, 7107–7112 (2016). CAS Google Scholar Tielrooij, K. J. et al. Photoexcitation cascade and multiple hot-carrier generation in graphene. Nat. Phys. 9, 248–252 (2013). CAS ...