580 citations · 1.9k across the 6 of their papers we have counts for
6 papers
Photocurrent imaging and efficient photon detection in a graphene transistor
Fengnian Xia, Thomas Mueller, Roksana Golizadeh-mojarad +5
We measure the channel potential of a graphene transistor using a scanning photocurrent imaging technique. We show that at a certain gate bias, the impact of the metal on the chann…
Energy dissipation in graphene field-effect transistors
Marcus Freitag, Mathias Steiner, Yves Martin +4
We measure the temperature distribution in a biased single-layer graphene transistor using Raman scattering microscopy of the 2D-phonon band. Peak operating temperatures of 1050 K…
How does the substrate affect the Raman and excited state spectra of a carbon nanotube?
Mathias Steiner, Marcus Freitag, James C. Tsang +4
We study the optical properties of a single, semiconducting single-walled carbon nanotube (CNT) that is partially suspended across a trench and partially supported by a SiO2-substr…
The role of contacts in graphene transistors: A scanning photocurrent study
T. Mueller, F. Xia, M. Freitag +2
A near-field scanning optical microscope is used to locally induce photocurrent in a graphene transistor with high spatial resolution. By analyzing the spatially resolved photo-res…
Chemical Doping and Electron-Hole Conduction Asymmetry in Graphene Devices
Damon B. Farmer, Roksana Golizadeh-Mojarad, Vasili Perebeinos +4
We investigate polyethylene imine and diazonium salts as stable, complementary dopants on graphene. Transport in graphene devices doped with these molecules exhibits asymmetry in e…
Device modeling of long-channel nanotube electro-optical emitter
J. Tersoff, Marcus Freitag, James C. Tsang +1
We present a simple analytic model of nanotube electro-optical emitters, along with improved experimental measurements using PMMA-passivated devices with reduced hysteresis. Both t…