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High Q-factor colloidal nanocrystal-based vertical microcavity by hot embossing technology

2006; American Institute of Physics; Volume: 88; Issue: 18 Linguagem: Inglês

10.1063/1.2200748

1520-8842

Luigi Martiradonna, Luigi Carbone, Milena De Giorgi, Liberato Manna, Giuseppe Gigli, R. Cingolani, Massimo De Vittorio,

Nanofabrication and Lithography Techniques

We report on the fabrication and optical characterization of vertical hybrid microcavities in which a layer of colloidal nanocrystals dispersed in an organic matrix is embedded between two inorganic mirrors. The devices are fabricated by a technique based on the unconventional use of the hot embossing technology, which allows a very fine control of the cavity length. The technique exploits a λ-thick microstructured dielectric top mirror pressed onto the bottom one, previously coated with the active layer, to sandwich the cavity and precisely control its thickness. Room-temperature photoluminescence measurements show a Q factor as high as 146 for our devices.