Ryuji Katayama

1.0k total citations
129 papers, 808 citations indexed

About

Ryuji Katayama is a scholar working on Condensed Matter Physics, Atomic and Molecular Physics, and Optics and Electrical and Electronic Engineering. According to data from OpenAlex, Ryuji Katayama has authored 129 papers receiving a total of 808 indexed citations (citations by other indexed papers that have themselves been cited), including 104 papers in Condensed Matter Physics, 76 papers in Atomic and Molecular Physics, and Optics and 68 papers in Electrical and Electronic Engineering. Recurrent topics in Ryuji Katayama's work include GaN-based semiconductor devices and materials (104 papers), Semiconductor Quantum Structures and Devices (65 papers) and Semiconductor materials and devices (37 papers). Ryuji Katayama is often cited by papers focused on GaN-based semiconductor devices and materials (104 papers), Semiconductor Quantum Structures and Devices (65 papers) and Semiconductor materials and devices (37 papers). Ryuji Katayama collaborates with scholars based in Japan, Thailand and United States. Ryuji Katayama's co-authors include Kentaro Onabe, Tomoyuki Tanikawa, Takashi Matsuoka, Shigeyuki Kuboya, Kanako Shojiki, Takashi Hanada, Atsushi Nishikawa, Y. Shiraki, Masayuki Kuroda and Takeshi Kimura and has published in prestigious journals such as Applied Physics Letters, Optics Express and Journal of Physics Condensed Matter.

In The Last Decade

Ryuji Katayama

121 papers receiving 801 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ryuji Katayama Japan 14 628 421 357 288 264 129 808
Z.-Q. Fang United States 21 678 1.1× 372 0.9× 756 2.1× 382 1.3× 424 1.6× 45 1.1k
Tomoya Yanamoto Japan 18 869 1.4× 672 1.6× 422 1.2× 228 0.8× 250 0.9× 41 1.0k
Seiji Nakahata Japan 6 605 1.0× 155 0.4× 233 0.7× 282 1.0× 295 1.1× 9 653
J. A. Freitas United States 13 795 1.3× 267 0.6× 362 1.0× 437 1.5× 449 1.7× 25 909
W. G. Perry United States 13 803 1.3× 248 0.6× 335 0.9× 376 1.3× 348 1.3× 27 897
W. Van der Stricht Belgium 13 673 1.1× 322 0.8× 193 0.5× 299 1.0× 305 1.2× 29 772
R. Zeisel Germany 15 481 0.8× 246 0.6× 332 0.9× 274 1.0× 198 0.8× 32 671
Kensaku Motoki Japan 6 559 0.9× 160 0.4× 245 0.7× 257 0.9× 284 1.1× 6 603
Shiping Guo United States 18 1.2k 1.9× 436 1.0× 959 2.7× 387 1.3× 636 2.4× 48 1.4k
L. Largeau France 13 407 0.6× 225 0.5× 214 0.6× 237 0.8× 214 0.8× 20 609

Countries citing papers authored by Ryuji Katayama

Since Specialization
Citations

This map shows the geographic impact of Ryuji Katayama'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 Ryuji Katayama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryuji Katayama more than expected).

Fields of papers citing papers by Ryuji Katayama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryuji Katayama. 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 Ryuji Katayama. The network helps show where Ryuji Katayama may publish in the future.

Co-authorship network of co-authors of Ryuji Katayama

This figure shows the co-authorship network connecting the top 25 collaborators of Ryuji Katayama. A scholar is included among the top collaborators of Ryuji Katayama 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 Ryuji Katayama. Ryuji Katayama 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.
Uemukai, Masahiro, et al.. (2025). Polarity inversion of N-polar GaN by metalorganic vapor phase epitaxy via thermal oxidation. Japanese Journal of Applied Physics. 64(2). 20903–20903. 1 indexed citations
2.
Uemukai, Masahiro, et al.. (2025). Polarity inversion of GaN from +c to −c polarity by metalorganic vapor phase epitaxy. Japanese Journal of Applied Physics. 64(2). 20901–20901.
3.
Uemukai, Masahiro, et al.. (2025). Detuning dependence in current-light-output characteristics of GaN-based DFB laser diodes. Japanese Journal of Applied Physics. 64(2). 22001–22001. 1 indexed citations
4.
5.
Uemukai, Masahiro, et al.. (2024). Design of Horizontally Stacked AlN and Dielectric Cores Transverse Quasi‐Phase‐Matched Channel Waveguide for Squeezed Light Generation. physica status solidi (a). 221(21). 1 indexed citations
6.
7.
Inoue, Taiki, et al.. (2024). Far-Reaching Remote Doping for Monolayer MoS2 Using a Ferroelectric Substrate: Unveiling the Impact of h-BN Spacer Thickness. ACS Applied Electronic Materials. 6(8). 5914–5922. 2 indexed citations
8.
Fujioka, Hiroshi, Hideki Hirayama, Yoichi Yamada, et al.. (2024). Nitride Semiconductors. physica status solidi (b). 261(11).
9.
10.
Uemukai, Masahiro, et al.. (2024). Continuous-wave operation of InGaN tunable single-mode laser with periodically slotted structure. Applied Physics Express. 17(8). 82003–82003. 1 indexed citations
11.
Shojiki, Kanako, Hideto Miyake, Shuhei Ichikawa, et al.. (2023). 229 nm far-ultraviolet second harmonic generation in a vertical polarity inverted AlN bilayer channel waveguide. Applied Physics Express. 16(6). 62006–62006. 7 indexed citations
12.
Shojiki, Kanako, et al.. (2022). Emission color modulation of InGaN/GaN multiple quantum wells by selective area metalorganic vapor phase epitaxy on hexagonal windows. Japanese Journal of Applied Physics. 61(3). 30904–30904.
13.
Uemukai, Masahiro, et al.. (2022). Enlargement of mode size in annealed proton-exchanged periodically-poled MgO doped stoichiometric LiTaO 3 waveguide for high power second harmonic generation. Japanese Journal of Applied Physics. 61(7). 72006–72006. 3 indexed citations
14.
Yokoyama, Naoki, Shuhei Ichikawa, Yasufumi Fujiwara, et al.. (2022). GaN channel waveguide with vertically polarity inversion formed by surface activated bonding for wavelength conversion. Japanese Journal of Applied Physics. 61(5). 50902–50902. 10 indexed citations
15.
Ishihara, Hiroki, Naoki Yokoyama, Yoshimasa Kawata, et al.. (2022). Fabrication and evaluation of rib-waveguide-type wavelength conversion devices using GaN-QPM crystals. Japanese Journal of Applied Physics. 61(SK). SK1020–SK1020. 9 indexed citations
16.
Hayashi, Yusuke, Ryuji Katayama, Toru Akiyama, Tomonori Ito, & Hideto Miyake. (2018). Polarity inversion of aluminum nitride by direct wafer bonding. Applied Physics Express. 11(3). 31003–31003. 15 indexed citations
17.
Tanikawa, Tomoyuki, Kanako Shojiki, Shigeyuki Kuboya, Ryuji Katayama, & Takashi Matsuoka. (2016). Large Stokes-like shift in N-polar InGaN/GaN multiple-quantum-well light-emitting diodes. Japanese Journal of Applied Physics. 55(5S). 05FJ03–05FJ03. 6 indexed citations
18.
Lai, Yi-Chun, Akio Higo, Takayuki Kiba, et al.. (2016). Nanometer scale fabrication and optical response of InGaN/GaN quantum disks. Nanotechnology. 27(42). 425401–425401. 11 indexed citations
19.
Tungasmita, Sukkaneste, et al.. (2010). MOVPE growth of high optical quality InGaPN layers on GaAs (001) substrates. Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics. 7(7-8). 2079–2081. 1 indexed citations
20.
Ichinose, Hiroshi, et al.. (2007). Structural transition control of laterally overgrown c‐GaN and h‐GaN on stripe‐patterned GaAs (001) substrates by MOVPE. physica status solidi (b). 244(6). 1769–1774. 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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