Controlling inelastic light scattering quantum pathways in graphene

Chi-Fan Chen, Cheol-Hwan Park, Bryan W. Boudouris, Jason Horng, Baisong Geng, Caglar Girit, Alex Zettl, Michael F. Crommie, Rachel A. Segalman, Steven G. Louie and Feng Wang ()
Additional contact information
Chi-Fan Chen: University of California at Berkeley
Cheol-Hwan Park: University of California at Berkeley
Bryan W. Boudouris: University of California at Berkeley
Jason Horng: University of California at Berkeley
Baisong Geng: University of California at Berkeley
Caglar Girit: University of California at Berkeley
Alex Zettl: University of California at Berkeley
Michael F. Crommie: University of California at Berkeley
Rachel A. Segalman: University of California at Berkeley
Steven G. Louie: University of California at Berkeley
Feng Wang: University of California at Berkeley

Nature, 2011, vol. 471, issue 7340, 617-620

Abstract: Controlling scattered light Inelastic light scattering spectroscopy is a powerful tool used in materials science to probe elementary excitations. In the quantum-mechanical realm, these excitations are generated by the incident photons through intermediate electronic transitions. Working with electrostatically doped graphene, Wang and colleagues show that it is possible to manipulate these intermediate 'quantum pathways'. They observe a surprising effect, where blocking one pathway results in an increased intensity, unveiling a mechanism of destructive quantum interference between different Raman pathways. The study raises the possibility of controlling quantum pathways to produce unusual inelastic light-scattering phenomena.

Date: 2011
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DOI: 10.1038/nature09866

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