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arXiv:2301.07950 (physics)
[Submitted on 19 Jan 2023]

Title:A Monolithic Graphene-Functionalized Microlaser for Multispecies Gas Detection

Authors:Yanhong Guo, Zhaoyu Li, Ning An, Yongzheng Guo, Yuchen Wang, Yusen Yuan, Hao Zhang, Teng Tan, Caihao Wu, Bo Peng, Giancarlo Soavi, Yunjiang Rao, Baicheng Yao
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Abstract:Optical microcavity enhanced light-matter interaction offers a powerful tool to develop fast and precise sensing techniques, spurring applications in the detection of biochemical targets ranging from cells, nanoparticles, and large molecules. However, the intrinsic inertness of such pristine microresonators limits their spread in new fields such as gas detection. Here, a functionalized microlaser sensor is realized by depositing graphene in an erbium-doped over-modal microsphere. By using a 980 nm pump, multiple laser lines excited in different mode families of the microresonator are co-generated in a single device. The interference between these splitting mode lasers produce beat notes in the electrical domain (0.2-1.1 MHz) with sub-kHz accuracy, thanks to the graphene-induced intracavity backward scattering. This allows for multispecies gas identification from a mixture, and ultrasensitive gas detection down to individual molecule.
Subjects: Optics (physics.optics)
Cite as: arXiv:2301.07950 [physics.optics]
  (or arXiv:2301.07950v1 [physics.optics] for this version)
  https://doi.org/10.48550/arXiv.2301.07950
Journal reference: Advanced Materials 34 (2022) 2207777
Related DOI: https://doi.org/10.1002/adma.202207777

Submission history

From: Giancarlo Soavi [view email]
[v1] Thu, 19 Jan 2023 09:04:31 UTC (2,392 KB)
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