[18a-S2_202-1~9] KS.2 Quantum Information Engineering Group

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[18a-S2_202-7] Research on Spectral Characterization Using Diamond Nanobeams and Tapered Fibers

〇(M1)Keitaro Aoyama¹, Yuhei Sekiguchi^2,3, Hodaka Kurokawa^2,3, Mikiya Kamata^1,2, Shoji Hachuda^1,2, Masaki Kunii^1,2, Takemasa Tamanuki^1,2,3, Satomi Ishida⁴, Hidetsugu Matsukiyo⁵, Natthajuks Pholsen⁵, Masao Nishioka⁵, Sangmin Ji⁵, Hideo Otsuki⁴, Kosuke Kimura⁶, Kouta Takenaka⁶, Shinobu Onoda^3,6, Toshihiko Baba^1,2,3, Satoshi Iwamoto^3,4,5, Hideo Kosaka^1,2,3 (1.Grad. Sch. Sci. Eng. Yokohama Natl. Univ., 2.IAS Yokohama Natl. Univ., 3.QIC Yokohama Natl. Univ., 4.RCAST Tokyo Univ., 5.IIS Tokyo Univ., 6.QST)

Keywords:

diamond,quantum transducer,optical packaging

Toward constructing a large-scale distributed quantum computing network, we aimed to achieve high-efficiency optical coupling between a diamond waveguide containing a single SnV center and an optical fiber. FDTD analysis predicted a maximum coupling efficiency of 98% through shape optimization. In experiments, a tapered fiber fabricated by hydrofluoric acid etching was brought into contact with the SnV-center-containing waveguide, and PL signals were detected. Future work will focus on improving manufacturing precision to eliminate discrepancies with theoretical values and realize a robust optical coupling package.