proper order: external circuit is connected as source electrode and drain electrode to gold / nickel dam, graphite alkene is as electrontransport, silica is as the insulating medium layer, semiconductor nanostructured is as the light absorption carrier, the silicon substrate is as the gate electrode...
A gateヽontrolled graphene–silicon Schottky junction photodetector that exhibits a high on/off photoswitching ratio (≈10), a very high photoresponsivity (≈70 A W), and a low dark current in the order of A cm in a wide wavelength range (395–850 nm) is demonstrated. The photoresponsivity...
Although silicon has dominated solid-state electronics for more than four decades, a variety of other materials are used in photonic devices to expand the wavelength range of operation and improve performance. For example, gallium-nitride based materials enable light emission at blue and ultraviolet w...
The fabricated silicon-graphene conductive photodetector shows a responsivity of up to ~105 A/W at room temperature (27 °C) and the response time is as short as ~30 μs. The temperature dependence of the silicon-graphene conductive photodetector is studied for the first time. It is ...
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-...
Nanocluster-graphene optical photodetector Noble metals such as Au and Ag are widely utilized as the best available plasmonic materials, while plasmon ohmic losses in these metals are generally large in the visible and the NIR spectral range [27]. Due to coupling between photons in the infrared ...
The new graphene photodetector has several other advantages, such as that it is sensitive to light of any polarization angle, which is in contrast to nearly all other plasmonic-enhanced graphene photodetectors in which the sensitivity is polarization-dependent. The new graphene photodetector is also ...
Based on the graphene-on-silicon slot waveguide, a compact and high-responsivity photodetector was demonstrated. Benefited from the lack of efficient electron cooling in the suspended graphene and the intensity enhancement effect in the nano slot, a maximum responsivity of 0.273 A W1 was achieved ...
We present a self-powered, high-performance graphene-enhanced ultraviolet silicon Schottky photodetector. Different from traditional transparent electrodes, such as indium tin oxides or ultra-thin metals, the unique ultraviolet absorption property of gra
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...