International Conference on Solid State Devices and Materials

Bull’s-eye structures containing optically active media provide an attractive platform for implementing efficient photonic quantum interfaces. By exploiting their symmetric nature, we previously designed a bull’s-eye optical cavity that enhances the optical absorption without polarization dependence, which can be applied to an efficient photon–spin converter using a gate-defined quantum dot (GQD). In this correspondence, we experimentally demonstrate that our bull’s-eye cavity can enhance the optical absorption of a quantum well (QW) without polarization dependence. Photoluminescence excitation spectra from the fabricated cavities show the maximum 12-times enhancement of QW absorption. The enhancement is almost identical for orthogonal polarizations.