Choi, Minho Lee, Mireu Park, Sung-Yul L. Kim, Byung Su Jun, Seongmoon Park, Suk In Song, Jin Dong Ko, Young-Ho Cho, Yong-Hoon 2024-01-19T09:31:48Z 2024-01-19T09:31:48Z 2023-05-18 2023-06 0935-9648 https://pubs.kist.re.kr/handle/201004/113698 Among the diverse platforms of quantum light sources, epitaxially grown semiconductor quantum dots (QDs) are one of the most attractive workhorses for realizing quantum photonic technologies owing to their outstanding brightness and scalability. However, the spatial and spectral randomness of most QDs severely hinders the construction of large-scale photonic platforms. In this work, a methodology is presented to deterministically integrate single QDs with tailor-made photonic structures. A nondestructive luminescence picking method termed as nanoscale-focus pinspot (NFP) is applied using helium-ion microscopy to reduce the luminous QD density while retaining the surrounding medium. A single QD emission is only extracted out of the high-density ensemble QDs. Then the tailor-made photonic structure of a circular Bragg reflector (CBR) is designed and deterministically integrated with the selected QD. Given that the microscopy can image with nanoscale resolution and apply NFP in situ, photonic devices can be deterministically fabricated on target QDs. The extraction efficiency of the NFP-selected QD emission is improved by 25 times after the CBR integration. Since the NFP method only controls the luminescence without destroying the medium, it is applicable to various photonic structures such as photonic waveguides or photonic crystal cavities regardless of materials. English WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Single Quantum Dot Selection and Tailor-Made Photonic Device Integration using a Nanoscale-Focus Pinspot Article 10.1002/adma.202210667 1 Advanced Materials, v.35, no.26 Advanced Materials 35 26 N scie scopus 000981822000001 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article GROWTH photonic cavity integration quantum dots quantum light sources semiconductor quantum dots single photon sources