145551 20260217205600.0 doi 10.1038/s41467-024-53182-9 sideral 140382 ART-2024-140382 eng Bylinkin, Andrei On-chip phonon-enhanced IR near-field detection of molecular vibrations 2024 Access copy available to the general public Unrestricted Phonon polaritons – quasiparticles formed by strong coupling of infrared (IR) light with lattice vibrations in polar materials – can be utilized for surface-enhanced infrared absorption (SEIRA) spectroscopy and even for vibrational strong coupling with nanoscale amounts of molecules. Here, we introduce and demonstrate a compact on-chip phononic SEIRA spectroscopy platform, which is based on an h-BN/graphene/h-BN heterostructure on top of a metal split-gate creating a p-n junction in graphene. The metal split-gate concentrates the incident light and launches hyperbolic phonon polaritons (HPhPs) in the heterostructure, which serves simultaneously as SEIRA substrate and room-temperature infrared detector. When thin organic layers are deposited directly on top of the heterostructure, we observe a photocurrent encoding the layer’s molecular vibrational fingerprint, which is strongly enhanced compared to that observed in standard far-field absorption spectroscopy. A detailed theoretical analysis supports our results, further predicting an additional sensitivity enhancement as the molecular layers approach deep subwavelength scales. Future on-chip integration of infrared light sources such as quantum cascade lasers or even electrical generation of the HPhPs could lead to fully on-chip phononic SEIRA sensors for molecular and gas sensing. info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S info:eu-repo/grantAgreement/ES/DGA/Q-MAD info:eu-repo/grantAgreement/EC/H2020/785219 /EU/Graphene Flagship Core Project 2/GrapheneCore2 This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 785219 -GrapheneCore2 info:eu-repo/grantAgreement/EC/H2020/881603/EU/Graphene Flagship Core Project 3/GrapheneCore3 This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 881603-GrapheneCore3 info:eu-repo/grantAgreement/ES/MCIU/PID2020-Q1115221GB-C41 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 15.7 2024 MULTIDISCIPLINARY SCIENCES 10 / 136 = 0.074 2024 Q1 T1 4.761 2024 Biochemistry, Genetics and Molecular Biology (miscellaneous) 2024 Q1 Physics and Astronomy (miscellaneous) 2024 Q1 Chemistry (miscellaneous) 2024 Q1 23.4 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Castilla, Sebastián Slipchenko, Tetiana M. Domina, Kateryna Calavalle, Francesco Pusapati, Varun-Varma Autore, Marta Casanova, Fèlix Hueso, Luis E. Martín-Moreno, Luis (orcid)0000-0001-9273-8165 Nikitin, Alexey Y. Koppens, Frank H. L. Hillenbrand, Rainer 15 (2024), 8907 [10 pp.] Nature communications 2041-1723 1399683 http://zaguan.unizar.es/record/145551/files/texto_completo.pdf Versión publicada 2533534 http://zaguan.unizar.es/record/145551/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:145551 articulos driver 2026-02-17-20:44:14 ARTICLE