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Color-tunable organic microcavity laser array using distributed feedback.
MedLine Citation:
PMID:  15783732     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Giuseppe Strangi; Valentin Barna; Roberto Caputo; Antonio De Luca; Carlo Versace; Nicola Scaramuzza; Cesare Umeton; Roberto Bartolino; Gabriel Noam Price
Publication Detail:
Type:  Journal Article     Date:  2005-02-17
Journal Detail:
Title:  Physical review letters     Volume:  94     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2005-03-23     Completed Date:  2005-04-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  063903     Citation Subset:  -    
Affiliation:
LICRYL-INFM and Center of Excellence CEMIF.CAL, Department of Physics, University of Calabria, I-87036 Rende (CS), Italy. Strangi@fis.unical.it
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