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Photocurrent Imaging and Efficient Photon Detection in a Graphene Transistor
Open accessAbstract
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 channel potential profile extends into the channel for more than one-third of the total channel length from both source and drain sides; hence, most of the channel is affected by the metal. The potential barrier between the metal-controlled graphene and bulk graphene channel is also measured at various gate biases. As the gate bias exceeds the Dirac point voltage, VDirac, the original p-type graphene channel turns into a p-n-p channel. When light is focused on the p-n junctions, an impressive external responsivity of 0.001 A/W is achieved, given that only a single layer of atoms are involved in photon detection.
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Cites
Two-dimensional gas of massless Dirac fermions in graphene
Novoselov, K. S., Geim, A. K., Morozov, S. V., Jiang, D., Katsnelson, M. I., Grigorieva, I. V., Dubonos, S. V., & Firsov, A. A. (2005) · Nature · doi:10.1038/nature04233 · Cited by 21,611
Fine Structure Constant Defines Visual Transparency of Graphene
Nair, R. R., Blake, P., Grigorenko, A. N., Novoselov, K. S., Booth, T. J., Stauber, T., Peres, N. M. R., & Geim, A. K. (2008) · Science · doi:10.1126/science.1156965 · Cited by 9,084
Cited by
Photodetectors based on graphene, other two-dimensional materials and hybrid systems
Koppens, F. H. L., Mueller, T., Avouris, P., Ferrari, A. C., Vitiello, M. S., & Polini, M. (2014) · Nature Nanotechnology · doi:10.1038/nnano.2014.215 · Cited by 3,828
Self-citationGraphene photodetectors for high-speed optical communications
Mueller, T., Xia, F., & Avouris, P. (2010) · Nature Photonics · doi:10.1038/nphoton.2010.40 · Cited by 2,474
Self-citationGraphene photodetectors with ultra-broadband and high responsivity at room temperature
Liu, C.-H., Chang, Y.-C., Norris, T. B., & Zhong, Z. (2014) · Nature Nanotechnology · doi:10.1038/nnano.2014.31 · Cited by 1,207
Chip-integrated ultrafast graphene photodetector with high responsivity
Gan, X., Shiue, R.-J., Gao, Y., Meric, I., Heinz, T. F., Shepard, K., Hone, J., Assefa, S., & Englund, D. (2013) · Nature Photonics · doi:10.1038/nphoton.2013.253 · Cited by 1,151
Photocurrent generation with two-dimensional van der Waals semiconductors
Buscema, M., Island, J. O., Groenendijk, D. J., Blanter, S. I., Steele, G. A., van der Zant, H. S. J., & Castellanos-Gomez, A. (2015) · Chemical Society Reviews · doi:10.1039/c5cs00106d · Cited by 1,051
Metadata
- Authors
- Xia, F., Mueller, T., Golizadeh-Mojarad, R., Freitag, M., Lin, Y.-M., Tsang, J., Perebeinos, V., & Avouris, P.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-02-09
- Volume
- 9
- Issue
- 3
- Pages
- 1039-1044
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2114912657
- Cited by
- 578
- References
- 2
- FWCI
- 18.02
- Type
- journal article
- Language
- en
- Open access
- green
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