RT Journal Article T1 Study of luminescence and optical resonances in Sb_2O_3 micro- and nanotriangles A1 Cebriano Ramírez, Teresa A1 Méndez Martín, Bianchi A1 Piqueras de Noriega, Javier AB Luminescence of micro-and nanotriangles of cubic antimony oxide, Sb_2O_3 has been investigated by cathodoluminescence (CL) in scanning electron microscope and by photoluminescence (PL) in a laser confocal microscope. The triangles were grown by a thermal evaporation-deposition process with pure antimony powders as precursor, and present a self assembled arrangement covering extended areas of the samples. CL spectra of the triangles show bands at 2-2.5 and 3.1 eV, the latter is not observed in the Sb_2O_3 initial powder. PL excited by 325 nm laser shows a band at 2.4 eV with a shoulder at 2.75 eV, as well as resonance modes suggesting optical cavity behavior of the triangles. 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Opt Lett 34:2533–2535 NO © Springer Science+Business Media Dordrecht 2012.Acknowledgments This work has been supported by Spanish MICINN through projects MAT 2009-07882 and Consolider 2010-00013. NO Spanish MICINN DS Docta Complutense RD 7 dic 2023