[16a-K305-1~8] 3.13 Silicon photonics, Photonics-electronics convergence, Optical control

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[16a-K305-6] Loss Reduction in Alumina Waveguide Crossings for Diamond-Color-Centers Quantum Computing

〇Takuto Yamaguchi¹, Naoki Fushimi¹, Masaharu Hida¹, Ryota Kitagawa¹, Toshiyuki Miyazawa¹, Kenichi Kawaguchi¹, Ryoichi Ishihara², Shintaro Sato¹ (1.Fujitsu Ltd., 2.TU Delft)

Keywords:

alumina,waveguide crossings,visible light

Quantum computers using diamond color centers enable scalable qubit coupling through optical interconnects. However, high-degree-of-freedom connection between distant qubits necessitates waveguide crossings. Demonstration of waveguide crossings in the visible light region has conventionally been limited to SiN. We designed and fabricated waveguide crossings on a low-loss alumina waveguide platform, reducing the loss at red light to 0.12 dB. This achievement is expected to enable highly efficient optical interconnections between distant qubits.