dc.contributorBrazilian Center for Research in Energy and Materials (CNPEM)
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2020-12-12T01:29:45Z
dc.date.accessioned2022-12-19T20:48:21Z
dc.date.available2020-12-12T01:29:45Z
dc.date.available2022-12-19T20:48:21Z
dc.date.created2020-12-12T01:29:45Z
dc.date.issued2020-06-17
dc.identifierACS Photonics, v. 7, n. 6, p. 1396-1402, 2020.
dc.identifier2330-4022
dc.identifierhttp://hdl.handle.net/11449/199063
dc.identifier10.1021/acsphotonics.0c00563
dc.identifier2-s2.0-85087387434
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5379697
dc.description.abstractBy synchrotron infrared nanospectroscopy, we demonstrate modulation of momentum and group velocity of subdiffractional hyperbolic phonon-polaritons (HP2), in hexagonal boron nitride nanocrystals, by varying the SiO2 film thickness in the hBN/SiO2/Au heterostructure. We reveal acceleration of the HP2 pulse in a hBN/(SiO2 wedge)/Au heterostructure with gradient of the SiO2 thickness. The acceleration is explained by a semiclassical modeling considering the polariton pulse as a free quantum particle with effective mass dependent on its group velocity. In quantitative agreement with simulations and semiempirical analysis, the modeling predicts an average acceleration of 1.5 × 1018 m·s-2 close to that of ∼1.45 × 1018 m·s-2 obtained from experimental inputs. From the fundamental aspect, the polariton acceleration allows discussing the undulatory-corpuscular behavior of polariton quasi-particles. The acceleration induced by the wedge is a general effect that can provide for control of the polariton pulse dynamics, which is compelling for future polaritonic devices.
dc.languageeng
dc.relationACS Photonics
dc.sourceScopus
dc.subjectgroup velocity modulation
dc.subjectpolariton acceleration
dc.subjectpolariton momentum-tuning
dc.subjectpolariton wave-particle behavior
dc.subjectsubstrate engineering
dc.subjectsubwavelength polariton
dc.titleAcceleration of Subwavelength Polaritons by Engineering Dielectric-Metallic Substrates
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución