Journal
SYNTHETIC METALS
Volume 153, Issue 1-3, Pages 237-240Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2005.07.273
Keywords
lasers; stimulated luminescence; spin wasting; manipulation of surface structure and morphology
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The excellent luminescence and gain properties of substituted oligothiophenes are exploited to imprint one-dimensional photonic crystals for the fabrication of printed distributed feedback (DFB) cavities. We demonstrate the dry-printing of organic semiconductor lasers, carrying out the realization of a complete device by a single nanofabrication step, which can be perfectly integrated with other existing planar semiconductor processing and etching technologies. In particular, a thiophene-based pentamer with very good amplified spontaneous emission and optical gain properties was used to fabricate a single-mode, first-order DFB lasers exhibiting an emission with a linewidth of 1.1 nm at about 636 nm for excitation fluences larger than 27 mu J/cm(2). These results clearly indicate that substituted oligothiophene-S,S-dioxides are promising candidates for solid-state lasers realizable by emerging nanopatteming technologies.
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