TAILIEUCHUNG - Petti et al. Nanoscale Research Letters 2011, 6:371

Petti et al. Nanoscale Research Letters 2011, 6:371 NANO EXPRESS Open Access Novel hybrid organic/inorganic 2D quasiperiodic PC: from diffraction pattern to vertical light extraction Lucia Petti1*, Massimo Rippa1, Jun Zhou2, Liberato Manna3, Marco Zanella3 and Pasquale Mormile1 Abstract Recently, important efforts have been dedicated to the realization of a fascinating class of new photonic materials or metamaterials, known as photonic quasicrystals (PQCs), in which the lack of the translational symmetry is compensated by rotational symmetries not achievable by the conventional periodic crystals. As ever, more advanced functionality is demanded and one strategy is the introduction of non-linear and/or active functionality in photonic materials | Petti et al. Nanoscale Research Letters 2011 6 371 http content 6 1 371 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Novel hybrid organic inorganic 2D quasiperiodic PC from diffraction pattern to vertical light extraction 1 12 3 3 1 Lucia Petti Massimo Rippa Jun Zhou Liberato Manna Marco Zanella and Pasquale Mormile Abstract Recently important efforts have been dedicated to the realization of a fascinating class of new photonic materials or metamaterials known as photonic quasicrystals PQCs in which the lack of the translational symmetry is compensated by rotational symmetries not achievable by the conventional periodic crystals. As ever more advanced functionality is demanded and one strategy is the introduction of non-linear and or active functionality in photonic materials. In this view core shell nanorods NRs are a promising active material for light-emitting applications. In this article a two-dimensional 2D hybrid a 2D octagonal PQC which consists of air rods in an organic inorganic nanocomposite is proposed and experimentally demonstrated. The nanocomposite was prepared by incorporating CdSe CdS core shell NRs into a polymer matrix. The PQC was realized by electron beam lithography EBL technique. Scanning electron microscopy far field diffraction and spectra measurements are used to characterize the experimental structure. The vertical extraction of the light by the coupling of the modes guided by the PQC slab to the free radiation via Bragg scattering consists of a narrow red emissions band at 690 nm with a full width at half-maximum FWHM of nm. The original characteristics of hybrid materials based on polymers and colloidal NRs able to combine the unique optical properties of the inorganic moiety with the processability of the host matrix are extremely appealing in view of their technological impact on the development of new high performing optical devices such as organic light-emitting diodes .

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