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Photocurrent in graphene harnessed by tunable intrinsic plasmons
Marcus Freitag, Tony Low, Wenjuan Zhu +3
Graphene's optical properties in the infrared and terahertz can be tailored and enhanced by patterning graphene into periodic metamaterials with sub-wavelength feature sizes. Here…
Mid-infrared plasmons in scaled graphene nanostructures
Hugen Yan, Tony Low, Wenjuan Zhu +6
Plasmonics takes advantage of the collective response of electrons to electromagnetic waves, enabling dramatic scaling of optical devices beyond the diffraction limit. Here, we dem…
Cooling of photoexcited carriers in graphene by internal and substrate phonons
Tony Low, Vasili Perebeinos, Raseong Kim +2
We investigate the energy relaxation of hot carriers produced by photoexcitation of graphene through coupling to both intrinsic and remote (substrate) surface polar phonons using t…
Photoconductivity of biased graphene
Marcus Freitag, Tony Low, Fengnian Xia +1
Graphene is a promising candidate for optoelectronic applications such as photodetectors, terahertz imagers, and plasmonic devices. The origin of photoresponse in graphene junction…
Manipulating infrared photons using plasmons in transparent graphene superlattices
Hugen Yan, Xuesong Li, Bhupesh Chandra +6
Superlattices are artificial periodic nanostructures which can control the flow of electrons. Their operation typically relies on the periodic modulation of the electric potential…
Infrared Spectroscopy of Wafer-Scale Graphene
Hugen Yan, Fengnian Xia, Wenjuan Zhu +5
We report on spectroscopy results from the mid- to far-infrared on wafer-scale graphene, grown either epitaxially on silicon carbide, or by chemical vapor deposition. The free carr…