[17p-K305-1~12] 3.13 Silicon photonics, Photonics-electronics convergence, Optical control

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)

[17p-K305-9] Light coupling efficiency improvement in photodiode chips mounted on grating couplers

〇Shota Kita^1,2, Rai Kou³, Yuriko Maegami³, Guangwei Cong³, Noritsugu Yamamoto³, Koji Yamada³, Akihiko Shinya^1,2, Hisashi Sumikura^1,2, Masaya Notomi^1,2 (1.NTT NPC, 2.NTT BRL, 3.AIST)

Keywords:

photonic packaging,photodiodes,grating couplers

Application investigations utilizing silicon photonics technology are accelerating toward industrialization. This study investigated the feasibility of flip-chip mounting a commercial surface input photodetector chip on grating couplers to simplify the photodetector integration. By flip-chip mounting the photodetector chips on the standard grating couplers, we obtained a coupling efficiency of 61%. We also tested meta-structured grating couplers, which deflect most of the light vertically, and the coupling efficiency improved to 79%.