Journal
NATURE NANOTECHNOLOGY
Volume 5, Issue 1, Pages 32-36Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2009.334
Keywords
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Funding
- University of California at Berkeley
- Office of Basic Energy Sciences
- US Department of Energy [DE-AC03-76SF0098, DE-AC02-05CH11231]
- Miller Fellowship and a Sloan Fellowship
- National Science Council, Taiwan
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Fano resonances are features in absorption, scattering or transport spectra resulting from the interaction of discrete and continuum states. They have been observed in a variety of systems(1-6). Here, we report a many-body Fano resonance in bilayer graphene that is continuously tunable by means of electrical gating. Discrete phonons and continuous exciton (electron-hole pair) transitions are coupled by electron-phonon interactions, yielding a new hybrid phonon-exciton excited state. It may also be possible to control the phonon-exciton coupling with an optical field. This tunable phonon-exciton system could allow novel applications such as phonon lasers.
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