Studies of polymer microring lasers subject to uniaxial stress
Date
2007Source Title
Applied Physics Letters
Print ISSN
0003-6951
Volume
91
Issue
12
Language
English
Type
ArticleItem Usage Stats
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Abstract
The emission spectra of microring lasers fabricated from π -conjugated polymer films casted on nylon microfibers with diameters in the range of 35-90 μm were studied upon application of uniaxial stress with strain up to ∼12%. The laser emission spectra substantially change with the applied stress, showing enhanced sensitivity to stress over changes induced in the fiber diameter alone. This is explained as due to the induced change in the polymer refractive index spectrum upon stress, causing an unexpected increase in the refractive index dispersion and, consequently, also in the effective refraction index for lasing at emission wavelengths. © 2007 American Institute of Physics.
Keywords
Conjugated polymersEmission spectroscopy
Nylon polymers
Polymer films
Refractive index
Wavelength
Fiber diameter
Microfibers
Uniaxial stress
Ring lasers