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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 2 — Jan. 15, 2007
  • pp: 190–192

Photochemistry of refractive index structures in poly(methyl methacrylate) by femtosecond laser irradiation

Alexandra Baum, Patricia J. Scully, Maria Basanta, C. L. Paul Thomas, Peter R. Fielden, Nicholas J. Goddard, Walter Perrie, and Paul R. Chalker  »View Author Affiliations


Optics Letters, Vol. 32, Issue 2, pp. 190-192 (2007)
http://dx.doi.org/10.1364/OL.32.000190


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Abstract

Femtosecond, subablation threshold photomodification of poly(methyl methacrylate) (PMMA) at 387 nm is explored to enable fabrication of optical components. Volatile fragment analysis (thermal desorption gas chromatography–mass spectrometry) and molecular weight distribution monitoring (size exclusion chromatography) suggest photochemical modification, involving direct cleavage of the polymer backbone and propagation via chain unzipping under formation of monomers, similar to the pyrolytic degradation of PMMA. Waveguides were produced in undoped, clinical-grade PMMA, showing an increased refractive index in the laser focal region ( Δ n max = 4 × 10 3 ) .

© 2006 Optical Society of America

OCIS Codes
(350.3390) Other areas of optics : Laser materials processing
(350.3450) Other areas of optics : Laser-induced chemistry

ToC Category:
Femtosecond Laser Microfabrication

History
Original Manuscript: September 19, 2006
Revised Manuscript: October 18, 2006
Manuscript Accepted: October 19, 2006
Published: December 23, 2006

Virtual Issues
Vol. 2, Iss. 2 Virtual Journal for Biomedical Optics

Citation
Alexandra Baum, Patricia J. Scully, Maria Basanta, C. L. Paul Thomas, Peter R. Fielden, Nicholas J. Goddard, Walter Perrie, and Paul R. Chalker, "Photochemistry of refractive index structures in poly(methyl methacrylate) by femtosecond laser irradiation," Opt. Lett. 32, 190-192 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-2-190

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