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Fabrication of refractive index and relief gratings in polymer films for DFB lasers

Published online by Cambridge University Press:  15 March 2011

T. Kavc
Affiliation:
Institute for Chemistry and Technology of Organic Materials, Graz University of Technology, 8010 Graz, Austria
G. Langer
Affiliation:
Institute for Chemistry and Technology of Organic Materials, Graz University of Technology, 8010 Graz, Austria
W. Kern*
Affiliation:
Institute for Chemistry and Technology of Organic Materials, Graz University of Technology, 8010 Graz, Austria
G. Kranzelbinder
Affiliation:
LPQM, École Normale Supérieure de Cachan, 94230 Cachan, France
E. Toussaere
Affiliation:
LPQM, École Normale Supérieure de Cachan, 94230 Cachan, France
G.A. Turnbull
Affiliation:
Ultrafast Photonics Collaboration, School of Physics and Astronomy, University of St. Andrews, Fife KY16 9SS, UK
I.D.W. Samuel
Affiliation:
Ultrafast Photonics Collaboration, School of Physics and Astronomy, University of St. Andrews, Fife KY16 9SS, UK
K.F. Iskra
Affiliation:
Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria
T. Neger
Affiliation:
Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria
*
To whom all correspondence should be adressed
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Abstract

A styrene copolymer of 4-vinylbenzyl thiocyanate (PST-co-VBT) was employed as recording material for optical interference patterns with periods ∧ < 1 μm. Using lower intensity laser irradiation (4 mJ cm-2, λ = 266 nm), refractive index gratings were produced in PST-co-VBT by an UV induced photoisomerization SCN - NCS. Subsequent modification of the patterns with gaseous amines yielded surface relief gratings via the formation of derivatives of thiourea. Laser irradiation with higher pulse energies (7 mJ cm-2, λ = 266 nm) directly produced surface relief gratings (modulation depth 30 nm). These gratings were also reactive towards amine reagents and allowed a selective functionalization of the grooves of the relief (“reactive gratings”). Optically inscribed gratings in PST-co-VBT were employed as optical resonators for distributed feedback (DFB) lasing. With a laser dye (DCM) dissolved in PST-co-VBT, optically pumped DFB laser action was observed after inscribing index and relief gratings. The pumping threshold for lasing Ith was 250 nJ cm-2 at λ = 532 nm.

Type
Research Article
Copyright
Copyright © Materials Research Society 2002

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References

REFERENCES

1. Kogelnik, H., Shank, C.V., Appl. Phys. Lett. 18, 152 (1971).Google Scholar
2. McGehee, M.D., Diaz-Garcia, M.A., Hide, F., Gupta, R., Miller, E.K., Moses, D., Heeger, A. J., Appl. Phys. Lett. 72, 1536 (1998).Google Scholar
3. Turnbull, G.A., Andrew, P., Jory, M.J., Barnes, W.L., Samuel, I.D.W., Phys. Rev. B. 6412, 5122 (2001).Google Scholar
4. Kallinger, C., Hilmer, M., Haugeneder, A., Perner, M., Spirkl, W., Lemmer, U., Feldmann, J., Scherf, U., Müllen, K., Gombert, A., Wittmer, V., Adv. Mater. 10, 920 (1998).Google Scholar
5. Riechel, S., Kallinger, C., Lemmer, U., Feldmann, J., Gombert, A., Wittmer, V., Scherf, U., Appl. Phys. Lett. 77, 2310 (2000).Google Scholar
6. Langer, G., Kavc, T., Kern, W., Kranzelbinder, G., Toussaere, E., Macromol. Chem. Phys. 202, 3459 (2001).Google Scholar
7. Kavc, T., Langer, G., Pölt, P., Reichmann, K., Kern, W., Macromol. Chem. Phys., in print (2002).Google Scholar
8. Greenham, N.C., Samuel, I.D.W., Hayes, G.R., Phillips, R.T., Kessener, Y.A.R.R., Moratti, S.C., Holmes, A.B., Chem. Phys. Lett. 241, 89 (1995).Google Scholar
9. Marcuse, D., in: Theory of Dielectric Waveguides, chap. 1, Academic, New York (1974).Google Scholar
10. Kavc, T., Kern, W., Zenz, C., Leising, G., Kranzelbinder, G., Toussaere, E., Monatsh. Chem. 132, 111 (2001).Google Scholar
11. Kranzelbinder, G., Toussaere, E., Zyss, J., Kavc, T., Langer, G., Kern, W., Applied Physics Letters (submitted).Google Scholar