31 January 2014 A tunable omni-directional sensing platform: strong light-matter interactions enabled by graphene
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Abstract
In this theoretical work, we report on voltage-controllable hybridization of electromagnetic modes arising from strong interaction between graphene plasmons and molecular vibrations. Compared with the strong light-matter interaction platforms based on noble metals, graphene offers much tighter plasmonic field confinement thus smaller effective mode volume and higher quality-factor due to longer carrier relaxation time in midinfrared regime, leading to Rabi splitting and hybridized polaritonic modes at 3 orders of magnitude lower molecular densities. Electrostatically tunable carrier density in graphene allows for dynamic control over the interaction strength. In addition, the flat dispersion band arising from the deep confinement of the polaritonic modes gives rise to the omni-directional excitation. Our approach is promising for practical implementations in infrared sensing and detection.
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Feng Liu, Feng Liu, Ertugrul Cubukcu, Ertugrul Cubukcu, } "A tunable omni-directional sensing platform: strong light-matter interactions enabled by graphene", Proc. SPIE 8993, Quantum Sensing and Nanophotonic Devices XI, 899326 (31 January 2014); doi: 10.1117/12.2038173; https://doi.org/10.1117/12.2038173
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