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arXiv · 1910.01231

Plasmonic-based gas sensing with graphene nanoribbons

Kaveh Khaliji·Sudipta Romen Biswas·Hai Hu·Xiaoxia Yang·Qing Dai·Sang-Hyun Oh·Phaedon Avouris·Tony Low
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Abstract

The main challenge to exploiting plasmons for gas vibrational mode sensing is the extremely weak infrared absorption of gas species. In this work, we explore the possibility of trapping free gas molecules via surface adsorption, optical, or electrostatic fields to enhance gas-plasmon interactions and to increase plasmon sensing ability. We discuss the relative strengths of these trapping forces and found gas adsorption in a typical nanoribbon array plasmonic setup produces measurable dips in optical extinction of magnitude 0.1 % for gas concentration of about parts per thousand level.

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Kaveh Khaliji, Sudipta Romen Biswas, Hai Hu, Xiaoxia Yang, Qing Dai, Sang-Hyun Oh, Phaedon Avouris, Tony Low. 2019-10-02. Plasmonic-based gas sensing with graphene nanoribbons. https://doi.org/10.1103/physrevapplied.13.011002

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