| Texto completo | |
| Autor(es): |
Feres, Flavio H.
[1, 2]
;
Mayer, Rafael A.
[1, 3]
;
Barcelos, Ingrid D.
[1]
;
Freitas, Raul O.
[1]
;
Maia, Francisco C. B.
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil
[2] Sao Paulo State Univ UNESP, Phys Dept, Inst Geosci & Exact Sci, BR-13506900 Rio Claro - Brazil
[3] Univ Estadual Campinas, Phys Dept, Gleb Wataghin Phys Inst, UNICAMP, BR-13083859 Campinas, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS PHOTONICS; v. 7, n. 6, p. 1396-1402, JUN 17 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
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 Sio(2) 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 x 10(18) m.s(-2) close to that of similar to 1.45 x 10(18) 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. (AU) | |
| Processo FAPESP: | 18/05425-3 - Efeito de cavidade de Fônons-Polaritons em heteroestruturas bidimensionais de Grafeno-Nitreto de boro hexagonal |
| Beneficiário: | Flávio Henrique Feres |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 19/08818-9 - Modulação de amplitude de poláritons por barreiras dielétricas bidimensionais sob a luz da nanoespectroscopia de infravermelho síncrotron |
| Beneficiário: | Rafael Alves Mayer |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |