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| Pàgina inicial > Articles > Articles publicats > Plasmonic antenna coupling to hyperbolic phonon-polaritons for sensitive and fast mid-infrared photodetection with graphene |
| Data: | 2020 |
| Resum: | Integrating and manipulating the nano-optoelectronic properties of Van der Waals heterostructures can enable unprecedented platforms for photodetection and sensing. The main challenge of infrared photodetectors is to funnel the light into a small nanoscale active area and efficiently convert it into an electrical signal. Here, we overcome all of those challenges in one device, by efficient coupling of a plasmonic antenna to hyperbolic phonon-polaritons in hexagonal-BN to highly concentrate mid-infrared light into a graphene pn-junction. We balance the interplay of the absorption, electrical and thermal conductivity of graphene via the device geometry. This approach yields remarkable device performance featuring room temperature high sensitivity (NEP of 82 pW/Hz) and fast rise time of 17 nanoseconds (setup-limited), among others, hence achieving a combination currently not present in the state-of-the-art graphene and commercial mid-infrared detectors. We also develop a multiphysics model that shows very good quantitative agreement with our experimental results and reveals the different contributions to our photoresponse, thus paving the way for further improvement of these types of photodetectors even beyond mid-infrared range. |
| Ajuts: | European Commission 804349 European Commission 785219 European Commission 881603 Ministerio de Economía y Competitividad SEV-2017-0706 Agencia Estatal de Investigación MAT2017-88358-C3-1-R Ministerio de Economía y Competitividad SEV-2015-0522 Ministerio de Ciencia e Innovación RTI2018-094830-B-100 Ministerio de Ciencia e Innovación MDM-2016-0618 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1656 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Nanophotonics and plasmonics ; Optical properties and devices ; Polaritons ; Two-dimensional materials |
| Publicat a: | Nature communications, Vol. 11 (2020) , art. 4872, ISSN 2041-1723 |
7 p, 2.3 MB |