Oligomer-based organic distributed feedback lasers by room-temperature nanoimprint lithography

Pisignano, Dario; Persano, Luana; Visconti, Paolo; Cingolani, Roberto; Gigli, Giuseppe; Barbarella, Giovanna
September 2003
Applied Physics Letters;9/29/2003, Vol. 83 Issue 13, p2545
Academic Journal
Room-temperature nanoimprint lithography in air is used in order to pattern a nonthermoplastic, low-molar-mass thiophene-based pentamer with excellent gain properties. No degradation of the luminescence efficiency of the active medium was observed after patterning. In this way, we fabricated single-mode emission distributed feedback lasers having a threshold excitation fluence of 140 μJ/cm[sup 2]. The lasing line is peaked at 637 nm and exhibits a linewidth of less than 0.7 nm and a well-behaved input-output characteristic in the whole range of pump fluences. These results demonstrate room-temperature nanoimprint lithography as powerful and straightforward fabrication technique for oligomer-based nanostructured optoelectronic devices. © 2003 American Institute of Physics.


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