Distributed feedback microstructures play a fundamental role in confining and manipulating light to obtain lasing in media with gain. Here, we present an innovative array of organic, color-tunable microlasers which are intrinsically phase locked. Dye-doped helixed liquid crystals were embedded within periodic, polymeric microchannels sculptured by light through a single-step process. The helical superstructure was oriented along the microchannels; the lasing was observed along the same direction at the red edge of the stop band. Several physical and technological advantages arise from this engineered heterostructure: a high quality factor of the cavity, ultralow lasing threshold, and thermal and electric control of the lasing wavelength and emission intensity. This level of integration of guest-host systems, embedded in artificially patterned small sized structures, might lead to new photonic chip architectures.
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Titolo: | Color-Tunable Organic Microcavity Laser Array Using Distributed Feedback |
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Data di pubblicazione: | 2005 |
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Handle: | http://hdl.handle.net/20.500.11770/129952 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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Phys. Rev. Lett. 94, 063903 (2005) (1).pdf | Versione Editoriale (PDF) | Non specificato | Administrator Richiedi una copia |