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(Color online) [(a) and (b)] Schematical top and side views of the fabricated photonic crystal band edge lasers. (c) AFM image of an imprinted laser.
(Color online) Intensity as a function of azimuthal angle for device of height . The emission directions correspond to the symmetry axes of the imposed rectangular cavity of the device. The wavelength is constant and corresponds to point emission. The intensity differences of the peaks may be attributed to slight differences in pumping conditions as the laser is rotated. Inset shows a typical laser spectrum (linewidth around ).
(Color online) Optofluidic tuning. Measured (red squared) and calculated (blue circles) emission wavelengths for device as a function of cladding refractive index (, , and ). The error bars reflect the uncertainty of the measured SU-8 refractive index. Each point is calculated individually to take into account wavelength dispersion in the waveguide structure.
(Color online) External slope efficiency of the emission as a function of cladding refractive index when measured from (black squares) and (red circles) for the device of Fig. 3. The error bars reflect the error of the fit to the measured data.
Measured and calculated wavelength values for lasers with different lattice constants . Calculations are done individually for each laser, to take account of dispersion in the effective refractive index calculations. The values of are predicted within due to the uncertainty of the SU-8 refractive index. The uncertainty of is due to limited spectrometer resolution.
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