Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards Substrate Engineering of Graphene-Silicon Schottky Diode
  Photodetectors   Graphene-Silicon Schottky diode photodetectors possess beneficial properties
such as high responsivities and detectivities, broad spectral wavelength
operation and high operating speeds. Various routes and architectures have been
employed in the past to fabricate devices. Devices are commonly based on the
removal of the silicon-oxide layer on the surface of silicon by wet-etching
before deposition of graphene on top of silicon to form the graphene-silicon
Schottky junction. In this work, we systematically investigate the influence of
the interfacial oxide layer, the fabrication technique employed and the silicon
substrate on the light detection capabilities of graphene-silicon Schottky
diode photodetectors. The properties of devices are investigated over a broad
wavelength range from near-UV to short-/mid-infrared radiation, radiation
intensities covering over five orders of magnitude as well as the suitability
of devices for high speed operation. Results show that the interfacial layer,
depending on the required application, is in fact beneficial to enhance the
photodetection properties of such devices. Further, we demonstrate the
influence of the silicon substrate on the spectral response and operating
speed. Fabricated devices operate over a broad spectral wavelength range from
the near-UV to the short-/mid-infrared (thermal) wavelength regime, exhibit
high photovoltage responses approaching 10$^6$ V/W and short rise- and
fall-times of tens of nanoseconds.

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The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: eess
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The categories of this paper are: bayes-an