374 citations · 2.6k across the 55 of their papers we have counts for
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Quantum-dot single-photon source on a CMOS silicon photonic chip integrated using transfer printing
Ryota Katsumi, Yasutomo Ota, Alto Osada +6
Silicon photonics is a powerful platform for implementing large-scale photonic integrated circuits (PICs), because of its compatibility with mature complementary-metal-oxide-semico…
Photonic crystal nanocavity based on a topological corner state
Yasutomo Ota, Feng Liu, Ryota Katsumi +4
Topological phonics has emerged as a novel approach to engineer the flow of light and provides unprecedented means for developing diverse photonic elements, including robust optica…
Strongly coupled single quantum dot-cavity system integrated on a CMOS-processed silicon photonic chip
Alto Osada, Yasutomo Ota, Ryota Katsumi +3
Quantum photonic integrated circuit (QPIC) is a promising tool for constructing integrated devices for quantum technology applications. In the optical regime, silicon photonics emp…
Optical coupling between atomically-thin black phosphorus and a two dimensional photonic crystal nanocavity
Yasutomo Ota, Rai Moriya, Naoto Yabuki +5
Atomically-thin black phosphorus (BP) is an emerging two dimensional (2D) material exhibiting bright photoluminescence in the near infrared. Coupling its radiation to photonic nano…
High-Q nanocavities in semiconductor-based three-dimensional photonic crystals
S. Takahashi, T. Tajiri, K. Watanabe +3
We experimentally demonstrated high quality factors (Q-factors) of nanocavities in three-dimensional photonic crystals by increasing the in-plane area of the structure. Entire stru…
Topological photonic crystal nanocavity laser
Yasutomo Ota, Ryota Katsumi, Katsuyuki Watanabe +2
Topological edge states exist at the interfaces between two topologically-distinct materials. The presence and number of such modes are deterministically predicted from the bulk-ba…