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Proceedings Paper

Ultrafast optical modulation of polymer nano-structured lasers
Author(s): Stefano Perissinotto; Marco Carvelli; Margherita Zavelani-Rossi; Guglielmo Lanzani; Chiara Bertarelli; Giuseppe Zerbi; Marco Salerno; Luca Troisi; Giuseppe Gigli
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Paper Abstract

In this work modulation of laser emission from polymer nano-structured lasers was explored through three different optical techniques. We show all optical control of polymer distributed feedback lasers based on polyfluorenes (PFO and F8BT) by applying a gating pulse, which completely switch-off emission in the sub-ps time scale. The switching mechanism is assigned to photo-injection of charge carriers induced by the gate transition. This is a resonant non-linear process, that might work at high bit-rate, paving the way toward plastic, large-scale integrated, ultrafast optical logic. New opportunities may also be offered by two other techniques: Two-photon two-color pumping allows lasing action only in presence of two different pulses, one in the visible and one in the IR, resonant with the second telecommunication window. This may allow to convert telecommunication signal from a fiber to visible range and thus to Plastic Optical Fibers for organic photonics. Another technique we explored uses a blend of F8BT and a photochromic material, (1,2-bis-(5-phenyl-2-methyl-3-tienyl) perfluocyclopentene))(C4). With a UV pulse we are able to change C4 structure, thus overlapping its absorption spectrum with F8BT emission and modulating yellow ASE emission.

Paper Details

Date Published: 2 September 2008
PDF: 7 pages
Proc. SPIE 7051, Organic Light Emitting Materials and Devices XII, 70511F (2 September 2008); doi: 10.1117/12.795949
Show Author Affiliations
Stefano Perissinotto, Politecnico di Milano (Italy)
Marco Carvelli, Politecnico di Milano (Italy)
Margherita Zavelani-Rossi, Politecnico di Milano (Italy)
Guglielmo Lanzani, Politecnico di Milano (Italy)
Chiara Bertarelli, Politecnico di Milano (Italy)
Giuseppe Zerbi, Politecnico di Milano (Italy)
Marco Salerno, National Nanotechnology Labs. of INFM-CNR (Italy)
Luca Troisi, National Nanotechnology Labs. of INFM-CNR (Italy)
Giuseppe Gigli, National Nanotechnology Labs. of INFM-CNR (Italy)

Published in SPIE Proceedings Vol. 7051:
Organic Light Emitting Materials and Devices XII
Franky So; Chihaya Adachi, Editor(s)

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