Abstract
The photon-emission efficiencies and photon indistinguishabilities of a single-photon source, which employs a cavity coupled with a quantum dot, are studied under above-band and resonant excitations. The results are obtained by solving master equations and by applying the quantum regression theorem. According to the study, the photon indistinguishability increases with the Purcell factor under resonant excitation, which is consistent with the increase in emission efficiency; however, these two figures of merit are inconsistent for the above-band excitation scheme. Moreover, the efficiencies, defined as the average photon number emitted in one excitation cycle, are almost the same for the two different excitation schemes, whereas the excitation power needed to reach that efficiency is much lower under resonant excitation than that for above-band excitation. These results will be helpful in improving the performances of the applications concerning indistinguishability and efficiency.
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Ben, Y., Hao, Z., Sun, C. et al. Photon-emission properties of quantum-dot-based single-photon sources under different excitations. Appl. Phys. B 81, 39–42 (2005). https://doi.org/10.1007/s00340-005-1869-3
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DOI: https://doi.org/10.1007/s00340-005-1869-3