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Micro-PL spectra of diameter reference mesa-structure (without oxidation) for different cw excitation densities: (1) , (2) , (3) , (4) , (5) , and (6) . GS, FES, and SES are denoted as ground, first-excited, and second-excited state transitions, respectively. The inset shows the spectrum of micro-PL on microdisk at . The sample-holder temperature is .
Temperature dependencies of the mode wavelengths (symbols) for the selected WG modes (marked as , , and ) and the optical transition wavelengths (lines) for the ground and excited states (marked as GS, FES, and SES).
Peak intensity (black dots) and linewidth (gray circle) as functions of excitation density for the selected WG modes measured at .
Temperature dependence of minimal linewidth of the selected WG modes.
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