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Ryohei Ikeda

As seen in: Science Magazine, Physical Review B, Mondaq
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Articles by Ryohei Ikeda

Symmetry control by Raman-mode excitations via anharmonic couplings with terahertz field–induced infrared modes in ferroaxial PbWO 4

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By Leticia Pérez-Sisqués, Cindy Reinger, Tianyuan Zheng, Masaki Yamamoto, Hiroki Sato, Ryohei Ikeda, Tetsushi Kubo, Tatsuya Miyamoto, Kenta Kimura, Tsuyoshi Kimura, Hiroshi Okamoto
| Science Magazine Verified
Abstract INTRODUCTION RESULTS DISCUSSION MATERIALS AND METHODS Acknowledgments Supplementary Materials REFERENCES Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Ultrafast conversion from a high- to low-symmetry structure is important for optical-switching devices. To realize such a conversion, we used nonlinear phononics.
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Melting of excitonic insulator phase by an intense terahertz pulse in $\mathrm{T}{\mathrm{a}}_{2}\mathrm{NiS}{\mathrm{e}}_{5}$

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By Tatsuya Miyamoto, Ryohei Ikeda, Naoki Takamura, Tetsushi Kubo
| Physical Review B
In this paper, the optical response to a terahertz pulse was investigated in the transition metal chalcogenide , a candidate excitonic insulator. First, by irradiating a terahertz pulse with a relatively weak electric field (0.3 MV/cm), the spectral changes in reflectivity near the absorption edge due to third-order optical nonlinearity were measured, and the absorption peak characteristic of the excitonic phase just below the interband transition was identified.
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Enforcement Of Judgments 2023

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By Takefumi Sato, Aoi Inoue, Kosuke Tsunashima, Ryohei Ikeda
| Mondaq
1.1 Options to Identify Another Party's Asset Position The measures available to a creditor seeking to identify the assets of another party differ depending on whether a judgment in favour of the creditor has already been rendered. Pre-judgment Measures Registered assets The ownership of certain types of properties is registered with the relevant authorities, but this information – although publicly available – can only be accessed in certain circumstances.
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