Keisuke Kondo

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We have studied wideband dispersion-free slow light in photonic crystal waveguides and other photonic nanostructures, which allows tunable delays in short optical pulses and the enhancement of light-matter interaction. This paper demonstrates the state-of-the-art devices fabricated by CMOS-compatible process, where compact devices of 200 – 400 μm lengths(More)
There has been an explosion of parts and components traded within East Asian production networks. China has emerged as the final assembly point for the goods produced. These goods then flow primarily outside of the region. When the Global Financial Crisis (GFC) occurred, the decrease in Western demand led to a synchronized decline in Asian exports. If more(More)
  • Inoue Hiroyasu, Nakajima Kentaro, Yukiko Saito, Umeno, Masahisa Fujita, Nobuaki Hamaguchi +4 others
  • 2015
This study empirically investigates the determinants of the productivity of knowledge creation by collaboration. By using the Japanese patent database, we extracted establishment-level patent co-invention information and found the following results. First, we find an inverse U-shaped pattern in the relationship between the similarity of knowledge stocks and(More)
Catch crop cultivation coupled with subsequent flood activity is an environmental friendly method of removing nutrient salts from soil in greenhouse. However, in comparison with the usual fallow period in greenhouse horticulture in Japan, a longer time is required for cultivation and soil drying after flooding. To minimize such time while retaining catch(More)
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