Full text loading...
77 K photoinduced absorption of a reference quantum dot sample (7am55) for two distinct linear orthogonal polarizations. The resonance at 60 meV is associated with the intersublevel absorption. The curves have been offset for clarity. The inset shows a similar measurement performed at lower temperature (20 K). An additional resonance is observed at higher energy. It is attributed to the intersublevel absorption in presence of holes.
Room temperature reflectivity spectra of two-dimensional photonic crystal membranes (77m05). The bottom curve corresponds to a lattice periodicity of , the middle curve to , and the upper curve to a periodicity of . The curves have been offset for clarity. Some of the reflectivity resonances of the photonic crystals are highlighted including the low group-velocity band edge mode at 65 meV for the sample. The detector has a cutoff below 50 meV.
77 K photoinduced absorption measured on the unpatterned area (lower curve) and on the photonic crystal (PhC) membrane with a lattice periodicity (upper curve). The curves have been offset for clarity. The origins are shown by dashed lines. The inset shows a measurement on the photonic crystal membrane measured with a lower resolution (2 meV).
Comparison between the photoinduced absorption spectra of the photonic crystal membranes with 10.5, 9.5, and lattice periodicities. The temperature is 77 K. The blueshift in the resonances of the 10.5 and samples are highlighted by arrows. The curves have been offset for clarity. The origin of each curve is shown by dashed lines.
Article metrics loading...