title: Spatial Control of Laser-Induced Doping Profiles in Graphene on Hexagonal Boron Nitride.
abstract: We present a method to create and erase spatially resolved doping profiles in graphene-hexagonal boron nitride heterostructures. The technique is based on photoinduced doping by a focused laser beam and does neither require masks nor photoresists. This makes our technique interesting for rapid prototyping of unconventional electronic device schemes, where the spatial resolution of the rewritable, long-term stable doping profiles is limited by only the laser spot size (≈600 nm) and the accuracy of sample positioning. Our optical doping method offers a way to implement and to test different, complex doping patterns in one and the very same graphene device, which is not achievable with conventional gating techniques.
authors.affiliation: JARA-FIT and 2nd Institute of Physics, RWTH Aachen University , 52074 Aachen, Germany.|Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich , 52425 Jülich, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Neumann
authors.affiliation: JARA-FIT and 2nd Institute of Physics, RWTH Aachen University , 52074 Aachen, Germany.
authors.forename: Leo
authors.initials: L
authors.lastname: Rizzi
authors.affiliation: JARA-FIT and 2nd Institute of Physics, RWTH Aachen University , 52074 Aachen, Germany.|Physics and Materials Science Research Unit, Université du Luxembourg , 1511 Luxembourg, Luxembourg.
authors.forename: Sven
authors.initials: S
authors.lastname: Reichardt
authors.affiliation: JARA-FIT and 2nd Institute of Physics, RWTH Aachen University , 52074 Aachen, Germany.|Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich , 52425 Jülich, Germany.
authors.forename: Bernat
authors.initials: B
authors.lastname: Terrés
authors.affiliation: JARA-FIT and 2nd Institute of Physics, RWTH Aachen University , 52074 Aachen, Germany.|Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich , 52425 Jülich, Germany.
authors.forename: Timofiy
authors.initials: T
authors.lastname: Khodkov
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Watanabe
authors.affiliation: National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Taniguchi
authors.affiliation: JARA-FIT and 2nd Institute of Physics, RWTH Aachen University , 52074 Aachen, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Beschoten
authors.affiliation: JARA-FIT and 2nd Institute of Physics, RWTH Aachen University , 52074 Aachen, Germany.|Peter Grünberg Institute (PGI-9), Forschungszentrum Jülich , 52425 Jülich, Germany.
authors.forename: Christoph
authors.initials: C
authors.lastname: Stampfer
keywords: boron nitride; electric transport; graphene; laser; p-n junction; photoinduced doping