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Random laser from engineered nanostructures obtained by surface tension driven lithography
Author(s) -
Ghofraniha Neda,
Viola Ilenia,
Maria Francesca Di,
Barbarella Giovanna,
Gigli Giuseppe,
Conti Claudio
Publication year - 2013
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201200105
Subject(s) - lithography , materials science , surface tension , laser , nanotechnology , soft lithography , nanostructure , fabrication , optoelectronics , optics , physics , medicine , alternative medicine , pathology , quantum mechanics
The random laser emission from the functionalized thienyl‐S,S‐dioxide quinquethiophene (T5OCx) in confined patterns with different shapes is demonstrated. Functional patterning of the light emitter organic material in well defined features is obtained by spontaneous molecular self‐assembly guided by surface tension driven (STD) lithography. Such controlled supramolecular nano‐aggregates act as scattering centers allowing the fabrication of one‐component organic lasers with no external resonator and with desired shape and efficiency. Atomic force microscopy shows that different geometric pattern with different supramolecular organization obtained by the lithographic process tailors the coherent emission properties by controlling the distribution and the size of the random scatterers.