DocumentCode :
1500787
Title :
Mechanically Flexible Organic Semiconductor Laser Array
Author :
Guilhabert, B. ; Laurand, N. ; Herrnsdorf, J. ; Chen, Y. ; Kanibolotsky, A.L. ; Orofino, C. ; Skabara, P.J. ; Dawson, M.D.
Author_Institution :
Inst. of Photonics, Univ. of Strathclyde, Glasgow, UK
Volume :
4
Issue :
3
fYear :
2012
fDate :
6/1/2012 12:00:00 AM
Firstpage :
684
Lastpage :
690
Abstract :
We report the fabrication and characterization of a mechanically flexible 4 × 4 array of organic semiconductor lasers using blue-emitting tris(trifluorene)truxene oligomers as the gain medium. The device was fabricated entirely by soft lithography from the reproduction of a 1-D silica master grating. The grating array pattern was created directly on the master by a polymeric mask. Each element, or pixel, of the resulting laser array is made of a polymer mesa with embedded surface grating, and all the array elements are on the same mechanically flexible platform. Laser oscillation thresholds of individual photopumped laser pixels are as low as 75 nJ (70 μJ/cm2 or 14 kW/cm2). The emission wavelength uniformity of the array is within ±3 nm with individual laser pixels emitting from 432 to 438 nm. On mechanical flexing of the array, a 10-nm tuning of the emission wavelength is achieved and is attributed to a change in the grating periodicity.
Keywords :
diffraction gratings; laser beams; laser tuning; masks; optical fabrication; optical polymers; optical pumping; organic semiconductors; semiconductor laser arrays; silicon compounds; soft lithography; 1D silica master grating; SiO2; blue-emitting tris(trifluorene)truxene oligomers; embedded surface grating; emission wavelength tuning; gain medium; grating array pattern; grating periodicity; laser oscillation thresholds; mechanically flexible organic semiconductor laser array; photopumped laser pixels; polymer mesa; polymeric mask; soft lithography; wavelength 10 nm; wavelength 432 nm to 438 nm; Arrays; Films; Gratings; Laser excitation; Measurement by laser beam; Polymers; Surface emitting lasers; Bragg gratings; Semicondictor laser arrays; organic semiconductors; semiconductor films;
fLanguage :
English
Journal_Title :
Photonics Journal, IEEE
Publisher :
ieee
ISSN :
1943-0655
Type :
jour
DOI :
10.1109/JPHOT.2012.2195651
Filename :
6188505
Link To Document :
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