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Applied Physics Letters / Volume 94 / Issue 12 / ORGANIC ELECTRONICS AND PHOTONICS
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Appl. Phys. Lett. 94, 123305 (2009); http://dx.doi.org/10.1063/1.3100406 (3 pages)

Rapid prototyping encapsulation for polymer light-emitting lasers

Luana Persano1, Andrea Camposeo1, Pompilio Del Carro1, Pierpaolo Solaro2, Roberto Cingolani1, Patrizia Boffi3, and Dario Pisignano1,4

1National Nanotechnology Laboratory (NNL) of INFM-CNR, Distretto Tecnologico ISUFI, Università del Salento, via Arnesano, I-73100 Lecce, Italy
2Consorzio di Ricerca 2MCLIV, Via Conchia, n. 34-70043 Monopoli (BA), Italy
3Centro Laser S.c.r.l., Strada provinciale per Casamassima, km 3-70010 Valenzano (BA), Italy
4Scuola Superiore ISUFI, Università del Salento, via Arnesano, I-73100 Lecce, Italy

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(Received 10 January 2009; accepted 26 February 2009; published online 26 March 2009)

Rapid prototyping of packaging elements realized by stereolithography for the encapsulation of plastic optoelectronic devices is demonstrated. We measure the operational lifetime behavior of a polymeric laser before and after the device packaging. The operational lifetime of a polymer vertical-cavity surface-emitting laser is increased by a factor of three upon continuous pumping at an excitation fluence (250 μJ/cm2) three times larger than the lasing threshold, corresponding to an overall laser duration of more than 3×103 h at a repetition rate of 10 Hz. These findings suggest rapid prototyping stereolithography as promising highly scalable technology for the encapsulation of organic light-emitting devices.

© 2009 American Institute of Physics

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KEYWORDS and PACS

Keywords

light emitting devices, optical polymers, semiconductor device packaging, solid lasers, stereolithography, surface emitting lasers

PACS

  • 42.55.Px

    Semiconductor lasers; laser diodes

  • 85.60.Jb

    Light-emitting devices

  • 85.40.Hp

    Lithography, masks and pattern transfer

  • 42.82.Cr

    Fabrication techniques; lithography, pattern transfer

  • 42.55.Rz

    Doped-insulator lasers and other solid state lasers

  • 42.70.Jk

    Polymers and organics

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3100406

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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Figures (click on thumbnails to view enlargements)

FIG.1
(a) Scheme of the St-L apparatus. (b) Photograph of the packaged device system including resin element, plastic o-ring, and quartz window. (c) and (d) are schemes of the cross-sectional views AA and BB marked in (b), respectively. Bottom-right dashed areas: St-L resin. Bottom-left dashed areas: polymer laser. Light areas: quartz for optical coupling. Arrow in (d): vacuum connection.

FIG.1 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.2
PL emission spectra of the laser device below (dashed line) and above (continuous lines) threshold acquired (from bottom to top) pumping at E = 25, 127, 250, 380, and 500 μJ/cm2, respectively. Inset: device peak emission intensity vs absorbed excitation fluence. The solid line is a linear fit to the experimental data.

FIG.2 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.3
Encapsulated device emission intensity vs wavelength and excitation position over a sample section of 1 mm. Samples excited with a pumping laser spot of 0.1 mm diameter.

FIG.3 Download High Resolution Image (.zip file) | Export Figure to PowerPoint

FIG.4
Temporal behavior of the emission decay from the unpackaged (gray line) and packaged (black line) laser device. Excitation fluence: E = 250 μJ/cm2.

FIG.4 Download High Resolution Image (.zip file) | Export Figure to PowerPoint



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