Abstract
The properties of photonic-crystal (PhC) cavity modes are investigated for applications in single-photon emitters. Hexagonal-lattice PhC H1 and L3 cavities are fabricated in a GaAs slab containing InAs quantum dots. The cavity modes are characterized by polarization-dependent micro-photoluminescence measurements. Split and nearly degenerate dipole modes in H1 cavities are demonstrated in the same batch of samples, and a single L3 cavity mode with specific polarization is clearly observed. The results reveal that the L3 PhC cavity exhibits fairly excellent performance even with remarkable distortion and is favorable for single-photon emitters. Finite-difference time-domain simulations show that the verticality of the air-hole sidewall has a significant influence on the properties of PhC cavity modes.
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