dc.contributor | Brazilian Center for Research in Energy and Materials (CNPEM) | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.contributor | Universidade Estadual de Campinas (UNICAMP) | |
dc.date.accessioned | 2020-12-12T01:29:45Z | |
dc.date.accessioned | 2022-12-19T20:48:21Z | |
dc.date.available | 2020-12-12T01:29:45Z | |
dc.date.available | 2022-12-19T20:48:21Z | |
dc.date.created | 2020-12-12T01:29:45Z | |
dc.date.issued | 2020-06-17 | |
dc.identifier | ACS Photonics, v. 7, n. 6, p. 1396-1402, 2020. | |
dc.identifier | 2330-4022 | |
dc.identifier | http://hdl.handle.net/11449/199063 | |
dc.identifier | 10.1021/acsphotonics.0c00563 | |
dc.identifier | 2-s2.0-85087387434 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5379697 | |
dc.description.abstract | By 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.language | eng | |
dc.relation | ACS Photonics | |
dc.source | Scopus | |
dc.subject | group velocity modulation | |
dc.subject | polariton acceleration | |
dc.subject | polariton momentum-tuning | |
dc.subject | polariton wave-particle behavior | |
dc.subject | substrate engineering | |
dc.subject | subwavelength polariton | |
dc.title | Acceleration of Subwavelength Polaritons by Engineering Dielectric-Metallic Substrates | |
dc.type | Artículos de revistas | |