Plasmonic antenna coupling to hyperbolic phonon-polaritons for sensitive and fast mid-infrared photodetection with graphene
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Cita com:
hdl:2117/359831
Tipus de documentArticle
Data publicació2020-12
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
ProjecteGrapheneCore2 - Graphene Flagship Core Project 2 (EC-H2020-785219)
GrapheneCore3 - Graphene Flagship Core Project 3 (EC-H2020-881603)
CUHL - Controlling Ultrafast Heat in Layered materials (EC-H2020-804349)
GrapheneCore3 - Graphene Flagship Core Project 3 (EC-H2020-881603)
CUHL - Controlling Ultrafast Heat in Layered materials (EC-H2020-804349)
Abstract
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=
ffiffiffiffiffiffi
Hz
p
) 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.
CitacióCastilla, S. [et al.]. Plasmonic antenna coupling to hyperbolic phonon-polaritons for sensitive and fast mid-infrared photodetection with graphene. "Nature communications", Desembre 2020, vol. 11, núm. 1.
ISSN2041-1723
Altres identificadorshttps://ddd.uab.cat/record/233953
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