Riu Hirai

Spin-Gap Behavior of Na₃Cu₂SbO₆ with Distorted Honeycomb Structure

Yoko Miura, Riu Hirai, Yoshiaki Kobayashi et al. · Journal of the Physical Society of Japan · 2006 · 85 citations

Natural Sciences, Materials Science, Physics +13

Practical Implementation of 100-Gbit/s/Lambda Optical Short-Reach Transceiver with Nyquist PAM4 Signaling using Electroabsorptive Modulated Laser (EML)

Nobuhiko Kikuchi, Riu Hirai, Takayoshi Fukui · Optical Fiber Communication Conference · 2015 · 33 citations

Engineering, Electrical Engineering, Physics +17

Intensity-modulated / direct-detection (IM/DD) Nyquist pulse-amplitude modulation (PAM) signaling for 100-Gbit/s/λ optical short-reach transmission

Nobuhiko Kikuchi, Riu Hirai · 2014 · 33 citations

Engineering, Communication, Electrical Engineering +16

Quasi Single-Sideband (SSB) IM/DD Nyquist PAM Signaling for High-Spectral Efficiency DWDM Transmission

Nobuhiko Kikuchi, Riu Hirai, Takayoshi Fukui · Optical Fiber Communication Conference · 2016 · 22 citations

Engineering, Communication, Electrical Engineering +10

Spin-gap behavior of distorted honeycomb lattice system Na3Cu2SbO6

Yoko Miura, Riu Hirai, Toshiaki Fujita et al. · Journal of Magnetism and Magnetic Materials · 2006 · 18 citations

Natural Sciences, Materials Science, Physics +12