Kei Takeya

896 total citations
61 papers, 695 citations indexed

About

Kei Takeya is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Spectroscopy. According to data from OpenAlex, Kei Takeya has authored 61 papers receiving a total of 695 indexed citations (citations by other indexed papers that have themselves been cited), including 47 papers in Electrical and Electronic Engineering, 25 papers in Atomic and Molecular Physics, and Optics and 25 papers in Spectroscopy. Recurrent topics in Kei Takeya's work include Terahertz technology and applications (46 papers), Spectroscopy and Laser Applications (24 papers) and Photonic and Optical Devices (23 papers). Kei Takeya is often cited by papers focused on Terahertz technology and applications (46 papers), Spectroscopy and Laser Applications (24 papers) and Photonic and Optical Devices (23 papers). Kei Takeya collaborates with scholars based in Japan, United States and Denmark. Kei Takeya's co-authors include Kodo Kawase, Atsushi Tani, Masayoshi Tonouchi, Kazunari Ohgaki, Saroj R. Tripathi, Iwao Kawayama, Takeshi Sugahara, Junichiro Kono, Cary L. Pint and Robert H. Hauge and has published in prestigious journals such as Nano Letters, Applied Physics Letters and The Journal of Physical Chemistry B.

In The Last Decade

Kei Takeya

58 papers receiving 666 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Kei Takeya Japan 15 428 204 152 142 114 61 695
A. Endriss Germany 6 128 0.3× 134 0.7× 20 0.1× 108 0.8× 186 1.6× 7 780
Thomas G. Spence United States 14 239 0.6× 112 0.5× 246 1.6× 8 0.1× 84 0.7× 26 713
M. Ollivier France 17 261 0.6× 111 0.5× 23 0.2× 13 0.1× 102 0.9× 56 940
Keith B. Rider United States 12 82 0.2× 354 1.7× 52 0.3× 17 0.1× 86 0.8× 16 651
М. В. Герасимов Russia 13 85 0.2× 51 0.3× 90 0.6× 10 0.1× 78 0.7× 103 787
В. Г. Артемов Russia 11 157 0.4× 100 0.5× 37 0.2× 11 0.1× 122 1.1× 40 444
C. E. Bryson United States 11 143 0.3× 48 0.2× 39 0.3× 13 0.1× 61 0.5× 26 613
А. И. Кривчиков Ukraine 18 28 0.1× 154 0.8× 45 0.3× 119 0.8× 95 0.8× 97 962
C. Jaccard Switzerland 14 96 0.2× 220 1.1× 29 0.2× 25 0.2× 41 0.4× 43 694
Michael Grünwald United States 16 201 0.5× 116 0.6× 28 0.2× 13 0.1× 106 0.9× 28 896

Countries citing papers authored by Kei Takeya

Since Specialization
Citations

This map shows the geographic impact of Kei Takeya's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Kei Takeya with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kei Takeya more than expected).

Fields of papers citing papers by Kei Takeya

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kei Takeya. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Kei Takeya. The network helps show where Kei Takeya may publish in the future.

Co-authorship network of co-authors of Kei Takeya

This figure shows the co-authorship network connecting the top 25 collaborators of Kei Takeya. A scholar is included among the top collaborators of Kei Takeya based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Kei Takeya. Kei Takeya is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Uchida, Hirohisa, et al.. (2022). Optical thin film coated organic nonlinear crystal for efficient terahertz wave generation. Scientific Reports. 12(1). 15082–15082. 2 indexed citations
2.
Sato, Harumi, et al.. (2022). Intermolecular Interaction of Tetrabutylammonium and Tetrabutylphosphonium Salt Hydrates by Low-Frequency Raman Observation. Molecules. 27(15). 4743–4743. 3 indexed citations
3.
Takeya, Kei, Takayuki Kamei, Kodo Kawase, & Hirohisa Uchida. (2020). Nonlinear optical process of second-order nonlinear optical susceptibility χ133(2) in an organic nonlinear optical crystal DAST. Optics Letters. 45(19). 5348–5348. 2 indexed citations
4.
Takeya, Kei, Ryohei Takahashi, Takashi Fukui, Saroj R. Tripathi, & Kodo Kawase. (2019). Terahertz characterization of propane hydrate. Japanese Journal of Applied Physics. 58(3). 32003–32003. 3 indexed citations
5.
Matsumura, Keisuke, et al.. (2018). THz-TDS Study on Tetrabutylammonium Bromide Hydrate. 53. 1–2. 1 indexed citations
6.
7.
Fan, Shuzhen, Hajime Takeuchi, Toshihiko Ouchi, Kei Takeya, & Kodo Kawase. (2013). Broadband terahertz wave generation from a MgO:LiNbO_3 ridge waveguide pumped by a 15 μm femtosecond fiber laser. Optics Letters. 38(10). 1654–1654. 37 indexed citations
8.
Kobayashi, Naohiro, T. Minami, Atsushi Tani, et al.. (2012). Intermolecular Hydrogen Transfer in Isobutane Hydrate. Energies. 5(6). 1705–1712. 17 indexed citations
9.
Hirakawa, Yasuyuki, et al.. (2011). Nondestructive Evaluation of Rubber Compounds by Terahertz Time-Domain Spectroscopy. Journal of Infrared Millimeter and Terahertz Waves. 32(12). 1457–1463. 21 indexed citations
10.
Yamauchi, Satoshi, et al.. (2010). Dielectric behavior of water in THz influenced by alkali and alkaline-earth halides. 1–1. 3 indexed citations
11.
Yoshimura, Masashi, Takeshi Matsukawa, Kei Takeya, et al.. (2010). New Organic Nonlinear Optical Crystal BDAS-TP for Terahertz Applications. 46. CTuR6–CTuR6. 1 indexed citations
12.
Takeya, Kei, Iwao Kawayama, Hironaru Murakami, et al.. (2010). Terahertz Emission from Coherent Phonon in Lithium Ternary Chalcopyrite Crystals Illuminated by Femtosecond Laser Pulses. 1. JWA112–JWA112. 1 indexed citations
13.
Nose, Toshiaki, et al.. (2010). THz Wave Transmission Properties of LC Composite Membrane Films. Molecular Crystals and Liquid Crystals. 516(1). 144–151. 5 indexed citations
14.
Matsukawa, Takeshi, Masashi Yoshimura, Yoshinori Takahashi, et al.. (2010). Bulk Crystal Growth of Stilbazolium Derivatives for Terahertz Waves Generation. Japanese Journal of Applied Physics. 49(7R). 75502–75502. 24 indexed citations
15.
Sasa, Shigehiko, et al.. (2010). Intense Terahertz Radiation from InAs Thin Films. Journal of Infrared Millimeter and Terahertz Waves. 32(5). 646–654. 11 indexed citations
16.
Kawayama, Iwao, Kei Takeya, Hironaru Murakami, et al.. (2009). Observation of Strain Effects of SrTiO3Thin Films by Terahertz Time-Domain Spectroscopy with a 4-Dimethylamino-N-methyl-4-stilbazolium Tosylate Emitter. Japanese Journal of Applied Physics. 48(9). 09KA16–09KA16. 2 indexed citations
17.
Takeya, Kei, Caihong Zhang, Iwao Kawayama, et al.. (2009). Terahertz Time Domain Spectroscopy for Structure-II Gas Hydrates. Applied Physics Express. 2(12). 122303–122303. 13 indexed citations
18.
Takeya, Kei, et al.. (2007). ESR observation of self-preservation effect of methane hydrate. 585. 1 indexed citations
19.
Takeya, Kei, Takeshi Sugahara, Kazunari Ohgaki, et al.. (2004). Electron Spin Resonance Study on $\gamma$-Ray-Induced Methyl Radicals in Methane Hydrates. Japanese Journal of Applied Physics. 43(1). 3066–3070. 2 indexed citations
20.
Takeya, Kei, et al.. (2004). ESR investigation of γ-irradiated natural methane hydrate from Blake Ridge Diapir, off east North America in ODP Leg 164. Applied Radiation and Isotopes. 62(2). 371–374. 8 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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