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(Color online) (a) Polarization-resolved spectra taken at from a elliptical micropillar showing both orthogonal polarizations and the splitting of the fundamental mode . (b) Polar plot of the low and high energy components of the fundamental mode intensities as a function of the polarization angle. (c) Polarization-selected spectra show fundamental and higher order modes . (d) Input-output characteristics of the selected polarization component of the fundamental mode under nonresonant cw optical excitation. Inset: SEM image of a single elliptically shaped micropillar from the same sample .
(Color online) Self-interference fringes of the polarization-selected fundamental emission mode at different delay times. Visibilities calculated from the sinusoidal fits (solid lines) are , 80%, and 21% with increasing delays , respectively.
(Color online) (a) Visibility curves of a selected polarization of a lasing mode at different power conditions. The visibility profiles change from Gaussian to Lorentzian shape with an increase of pump power . Inset of (a): of the lasing mode with respect to the power in log-log scale. (b) Visibility curve of the lasing mode without a polarization selection at . Solid line is a damping sinusoidal fit which reveals the period of oscillations . Inset of (b): High-resolution spectra of the lasing mode taken at show the polarization splitting of which is in excellent agreement with the period of oscillations observed in interference measurements.
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