Peer-Reviewed Journal Details
Mandatory Fields
Alexandra Baum and Scully, Patricia J. and Maria Basanta and Paul Thomas, C. L. and Fielden, Peter R. and Goddard, Nicholas J. and Walter Perrie and Chalker, Paul R.
2007
January
Photochemistry of refractive index structures in poly(methyl methacrylate) by femtosecond laser irradiation
Published
()
Optional Fields
32
2
190
192
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 (Δnmax=4×10-3). \circledC 2006 Optical Society of America.
10.1364/OL.32.000190
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