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dc.contributor.authorMorell, Nicolas
dc.contributor.authorReserbat-Plantey, Antoine
dc.contributor.authorTsioutsios, Ioannis
dc.contributor.authorSchädler, Kevin Gerd
dc.contributor.authorDubin, François
dc.contributor.authorKoppens, Frank H. L.
dc.contributor.authorBachtold, Adrian
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.identifier.citationMorell, Nicolas [et al.]. High Quality Factor Mechanical Resonators Based on WSe2 Monolayers. "Nano Letters", 26 Juliol 2016, vol. 16, núm. 8, p. 5102-5108.
dc.description.abstractSuspended monolayer transition metal dichalcogenides (TMD) are membranes that combine ultralow mass and exceptional optical properties, making them intriguing materials for opto-mechanical applications. However, the low measured quality factor of TMD resonators has been a roadblock so far. Here, we report an ultrasensitive optical readout of monolayer TMD resonators that allows us to reveal their mechanical properties at cryogenic temperatures. We find that the quality factor of monolayer WSe2 resonators greatly increases below room temperature, reaching values as high as 1.6 × 104 at liquid nitrogen temperature and 4.7 × 104 at liquid helium temperature. This surpasses the quality factor of monolayer graphene resonators with similar surface areas. Upon cooling the resonator, the resonant frequency increases significantly due to the thermal contraction of the WSe2 lattice. These measurements allow us to experimentally study the thermal expansion coefficient of WSe2 monolayers for the first time. High Q-factors are also found in resonators based on MoS2 and MoSe2 monolayers. The high quality-factor found in this work opens new possibilities for coupling mechanical vibrational states to two-dimensional excitons, valley pseudospins, and single quantum emitters and for quantum opto-mechanical experiments based on the Casimir interaction.
dc.format.extent7 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshNanoelectromechanical systems
dc.subject.other2D materials
dc.subject.otherNanomechanical resonators
dc.titleHigh Quality Factor Mechanical Resonators Based on WSe2 Monolayers
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/613024/EU/GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICES/GRASP
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/294056/EU/Graphene Nano-Photonics/GRANOP
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/279278/EU/NanoElectroMechanical Systems based on Carbon Nanotube and Graphene/CARBONNEMS
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/307806/EU/Tunable light tightly bound to a single sheet of carbon atoms:graphene as a novel platform for nano-optoelectronics/CARBONLIGHT
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/604391/EU/Graphene-Based Revolutions in ICT And Beyond/GRAPHENE
local.citation.publicationNameNano Letters

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