Laser action studies of π-conjugated polymer microcavities
Date
2008Source Title
Proceedings of the 10th Anniversary International Conference on Transparent Optical Networks, ICTON 2008
Publisher
IEEE
Pages
69 - 72
Language
English
Type
Conference PaperItem Usage Stats
118
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91
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Abstract
Unidirectional laser emission was observed from φ-conjugated polymer microcavities with spiral geometry, and from microdisks containing line defects. For both type of cavities directionality contrast of the laser emission was found to be ̃ 10, with far-field lateral divergence angle of ̃ 15°. No significant increase in the laser threshold intensity was observed compared with simple microdisk cavities. In addition we also studied the emission spectra of microring polymer lasers fabricated on nylon microfibers upon application of uniaxial stress with strain up to ̃ 12%. Substantial change in the laser emission spectrum was observed when stress was applied; showing enhanced optical sensitivity to stress larger than the changes induced in the emission spectrum caused by the microfiber diameter change. We explain the enhanced sensitivity to stress as due to the induced change in the polymer refractive index dispersion, in particular at the laser emission wavelength (̃ 635 nm).
Keywords
π-Conjugated polymersOptical design
Optical materials
Optical properties
Organic polymers
Photoresists
Polymers
Refractive index
Videodisks
Directional emission
Divergence angles
Emission spectrums
Enhanced sensitivity
Far fields
Laser action
Laser actions
Laser emission spectrum
Laser emissions
Laser thresholds
Line defects
Micro rings
Micro-disks
Micro-fibers
Microcavity
Microdisk cavities
Optical sensitivity
Polymer lasers
Refractive index dispersion
Spiral geometries
Transparent optical networks
Uniaxial stress
Whispering gallery modes
Permalink
http://hdl.handle.net/11693/26860Published Version (Please cite this version)
http://dx.doi.org/10.1109/ICTON.2008.4598736Collections
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