000145551 001__ 145551 000145551 005__ 20260112133345.0 000145551 0247_ $$2doi$$a10.1038/s41467-024-53182-9 000145551 0248_ $$2sideral$$a140382 000145551 037__ $$aART-2024-140382 000145551 041__ $$aeng 000145551 100__ $$aBylinkin, Andrei 000145551 245__ $$aOn-chip phonon-enhanced IR near-field detection of molecular vibrations 000145551 260__ $$c2024 000145551 5060_ $$aAccess copy available to the general public$$fUnrestricted 000145551 5203_ $$aPhonon 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. 000145551 536__ $$9info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S$$9info:eu-repo/grantAgreement/ES/DGA/Q-MAD$$9info:eu-repo/grantAgreement/EC/H2020/785219 /EU/Graphene Flagship Core Project 2/GrapheneCore2$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 785219 -GrapheneCore2$$9info:eu-repo/grantAgreement/EC/H2020/881603/EU/Graphene Flagship Core Project 3/GrapheneCore3$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 881603-GrapheneCore3$$9info:eu-repo/grantAgreement/ES/MCIU/PID2020-Q1115221GB-C41 000145551 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es 000145551 590__ $$a15.7$$b2024 000145551 592__ $$a4.761$$b2024 000145551 591__ $$aMULTIDISCIPLINARY SCIENCES$$b10 / 135 = 0.074$$c2024$$dQ1$$eT1 000145551 593__ $$aBiochemistry, Genetics and Molecular Biology (miscellaneous)$$c2024$$dQ1 000145551 593__ $$aPhysics and Astronomy (miscellaneous)$$c2024$$dQ1 000145551 593__ $$aChemistry (miscellaneous)$$c2024$$dQ1 000145551 594__ $$a23.4$$b2024 000145551 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000145551 700__ $$aCastilla, Sebastián 000145551 700__ $$aSlipchenko, Tetiana M. 000145551 700__ $$aDomina, Kateryna 000145551 700__ $$aCalavalle, Francesco 000145551 700__ $$aPusapati, Varun-Varma 000145551 700__ $$aAutore, Marta 000145551 700__ $$aCasanova, Fèlix 000145551 700__ $$aHueso, Luis E. 000145551 700__ $$0(orcid)0000-0001-9273-8165$$aMartín-Moreno, Luis 000145551 700__ $$aNikitin, Alexey Y. 000145551 700__ $$aKoppens, Frank H. L. 000145551 700__ $$aHillenbrand, Rainer 000145551 773__ $$g15 (2024), 8907 [10 pp.]$$tNature communications$$x2041-1723 000145551 8564_ $$s1399683$$uhttps://zaguan.unizar.es/record/145551/files/texto_completo.pdf$$yVersión publicada 000145551 8564_ $$s2533534$$uhttps://zaguan.unizar.es/record/145551/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000145551 909CO $$ooai:zaguan.unizar.es:145551$$particulos$$pdriver 000145551 951__ $$a2026-01-12-13:16:42 000145551 980__ $$aARTICLE