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Schematic view of the prism-shaped gated microcavity. The gate width was about , which allowed easy focusing of the infrared light in the depleted region. The large arrows represent the optical path in the substrate.
Reflectance of the microcavity sample for different angles of incidence in TM polarization. The spectra were collected at , with a resolution of . The inset contains the experimental points corresponding to the energy position of the dips.
Room-temperature reflection spectra of the microcavity system at the resonance angle of 68.67° as a function of gate voltage. Note that the intensity of the peak is only slightly affected by the depletion, since in this case it is mainly determined by the strength of the cavity resonance. In the inset, we report the analogous reflectance data from the ten quantum-well structure at .
The polariton splitting of the ten quantum-well structure at different gate voltages (left). Experimental data are represented by black dots and theoretical calculations by open triangles. The right line is the curve measured between ohmic contact and gate.
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