[20a-A101-1~11] 3.10 Photonic structures and phenomena (formerly 3.11)

▲ [20a-A101-5] Design of a photonic crystal nanobeam cavity in AlN-diamond hybrid platform (II): Investigation of the effect of the shape of air holes

〇Yeting Yang^1,2, Siyuan Gao^1,2, Feng Tian¹, Satoshi Iwamoto^1,2 (1.RCAST, 2.IIS)

Keywords:Photonics crystal, Nanocavities, Nitrogen vacancy centers

Connecting remotely located quantum nodes by using quantum repeaters and quantum interfaces is one of the key technologies not only for future long-distance quantum networks but also for large-scale quantum processing [1-3]. Among various platforms, an AlN-diamond hybrid structure is a promising platform for a quantum interface between a near-infrared photon capable of traveling over a long distance in optical fiber and a microwave photon carrying information from a superconducting quantum processer [4]. We have previously reported a design of a photonic crystal (PhC) nanobeam cavity with circular air holes, showing a theoretical Purcell factor F_p over 700, in the AlN-diamond hybrid platform [5]. In this study, we investigated PhC nanobeam structures with different shaped air holes and found that the use of square-shaped holes, instead of circular-shaped holes, enables the further increase of cavity Q and F_p.