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      Studies of polymer microring lasers subject to uniaxial stress

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      Author(s)
      Tulek, A.
      Vardeny, Z.V.
      Date
      2007
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Volume
      91
      Issue
      12
      Language
      English
      Type
      Article
      Item Usage Stats
      115
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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 polymers
      Emission spectroscopy
      Nylon polymers
      Polymer films
      Refractive index
      Wavelength
      Fiber diameter
      Microfibers
      Uniaxial stress
      Ring lasers
      Permalink
      http://hdl.handle.net/11693/23375
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.2785955
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      • Department of Physics 2397
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