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000858274 1001_ $$00000-0002-9953-6934$$aEmelianov, Aleksei V.$$b0$$eCorresponding author
000858274 245__ $$aThermoelectrically Driven Photocurrent Generation in Femtosecond Laser Patterned Graphene Junctions
000858274 260__ $$aWashington, DC$$bACS$$c2018
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000858274 520__ $$aSingle and few-layer graphene photodetectors have attracted much attention in the past few years. Pristine graphene shows a very weak response to visible light; hence, fabrication of complex graphene-based detectors is a challenging task. In this work, we utilize the ultrafast laser functionalization of single-layer CVD graphene for highly desirable maskless fabrication of micro- and nanoscale devices. We investigate the optoelectronic response of pristine and functionalized devices under femtosecond and continuous wave lasers irradiation. We demonstrate that the photocurrent generation in p–p+ junctions formed in single-layer graphene is related to the photothermoelectric effect. The photoresponsivity of our laser patterned single-layer graphene junctions is shown to be as high as 100 mA/W with noise equivalent power less than 6 kW/cm2. These results open a path to a low-cost maskless technology for fabrication of graphene-based optoelectronic devices with tunable properties for spectroscopy, signal processing, and other applications.
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000858274 7001_ $$0P:(DE-Juel1)159559$$aKireev, Dmitry$$b1
000858274 7001_ $$0P:(DE-Juel1)128713$$aOffenhäusser, Andreas$$b2
000858274 7001_ $$0P:(DE-HGF)0$$aOtero, Nerea$$b3
000858274 7001_ $$0P:(DE-HGF)0$$aRomero, Pablo M.$$b4
000858274 7001_ $$0P:(DE-HGF)0$$aBobrinetskiy, Ivan I.$$b5
000858274 773__ $$0PERI:(DE-600)2745489-7$$a10.1021/acsphotonics.8b00350$$gVol. 5, no. 8, p. 3107 - 3115$$n8$$p3107 - 3115$$tACS photonics$$v5$$x2330-4022$$y2018
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