Ahn, D. H. Jang, Y. D. Baek, J. S. Park, S. I. Song, J. D. Lee, D. 2024-01-19T10:01:45Z 2024-01-19T10:01:45Z 2023-04-06 2023-03 2378-0967 https://pubs.kist.re.kr/handle/201004/113934 High-brightness single photon sources (SPSs) are key components for practical quantum information processing systems. Although the performances of recently reported high-brightness SPSs are excellent, it remains challenging to match the emission wavelength of a quantum dot (QD) to the cavity since the high-Q cavity structures have narrow spectral bandwidths. Here, we propose a highly bright and broadband QD SPS that can be deterministically fabricated with a simple yet precise method. The optimized GaAs-polymer double solid immersion lens structure is capable of a brightness of 88% at 0.5 NA and has an operation band of 65 nm with a brightness of over 80% from numerical simulations. Experimentally, we achieved a brightness of 51.6%+/- 2% and pure single photon emission [g((2))(0) = 0.029 +/- 0.005] at saturation. We believe that our result can pave the way to a practical high-brightness QD SPS, considering its simple QD geometry together with its low cost and precise deterministic fabrication without using expensive and complicated e-beam lithography and dry etching processes.(c) 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). English AIP Publishing LLC | American Institute of Physics A broadband high-brightness quantum-dot double solid immersion lens single photon source Article 10.1063/5.0132161 1 APL Photonics, v.8, no.3 APL Photonics 8 3 Y scie scopus 000943123200001 2-s2.0-85149624395 Optics Physics, Applied Optics Physics Article INDISTINGUISHABLE PHOTONS ENTANGLED PHOTONS TELEPORTATION PAIRS