Unveiling Nanometer Scale Extinction and Scattering Phenomena through Combined Electron Energy Loss Spectroscopy and Cathodoluminescence Measurements

Autor(es):Mostrar menos -

Losquin, Arthur ^{[1, 2]} ; Zagonel, Luiz F. ^{[3, 2]} ; Myroshnychenko, Viktor ^{[4, 5]} ; Rodriguez-Gonzalez, Benito ^[6] ; Tence, Marcel ^[2] ; Scarabelli, Leonardo ^[7] ; Foerstner, Jens ^[5] ; Liz-Marzan, Luis M. ^{[6, 7, 8]} ; Javier Garcia de Abajo, F. ^{[9, 10]} ; Stephan, Odile ^[2] ; Kociak, Mathieu ^[2]

Afiliação do(s) autor(es)

^[1] Lund Univ, Dept Phys, SE-22100 Lund - Sweden

^[2] Univ Paris 11, CNRS, UMR8502, Phys Solides Lab, F-91405 Orsay - France

^[3] Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil

^[4] CSIC, Inst Quim Fis, E-28006 Madrid - Spain

^[5] Univ Paderborn, Inst Elect Engn, D-33098 Paderborn - Germany

^[6] Univ Vigo, Dept Quim Fis, Vigo 36310 - Spain

^[7] CIC BiomaGUNE, Bionanoplasmon Lab, Donostia San Sebastian 20009 - Spain

^[8] Basque Fdn Sci, Ikerbasque, Bilbao 48013 - Spain

^[9] ICFO Inst Ciencies Foton, Castelldefels 08860, Barcelona - Spain

^[10] ICREA, Barcelona 08010 - Spain

• Tipo de documento: Artigo Científico
• Fonte: Nano Letters; v. 15, n. 2, p. 1229-1237, FEB 2015.
• Citações Web of Science: 61

Resumo

Plasmon modes of the exact same individual gold nanoprisms are investigated through combined nanometer-resolved electron energy-loss spectroscopy (EELS) and cathodoluminescence (CL) measurements. We show that CL only probes the radiative modes, in contrast to EELS, which additionally reveals dark modes. The combination of both techniques on the same particles thus provides complementary information and also demonstrates that although the radiative modes give rise to very similar spatial distributions when probed by EELS or CL, their resonant energies appear to be different. We trace this phenomenon back to plasmon dissipation, which affects in different ways the plasmon signatures probed by these techniques. Our experiments are in agreement with electromagnetic numerical simulations and can be further interpreted within the framework of a quasistatic analytical model. We therefore demonstrate that CL and EELS are closely related to optical scattering and extinction, respectively, with the addition of nanometer spatial resolution. (AU)

• Processo FAPESP: 13/06167-4 - 19th international Vacuum Congress 2013 (IVC-19/ICSS-15 and ICN+T 2013)
• Beneficiário: Luiz Fernando Zagonel
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior
• Processo FAPESP: 11/05989-5 - E-MRS ICAM IUMRS 2011 Spring Meeting
• Beneficiário: Luiz Fernando Zagonel
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior