Masayoshi Koike

2.6k total citations · 2 hit papers
71 papers, 2.1k citations indexed

About

Masayoshi Koike is a scholar working on Condensed Matter Physics, Electrical and Electronic Engineering and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Masayoshi Koike has authored 71 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 41 papers in Condensed Matter Physics, 28 papers in Electrical and Electronic Engineering and 24 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Masayoshi Koike's work include GaN-based semiconductor devices and materials (36 papers), Semiconductor Quantum Structures and Devices (20 papers) and Ga2O3 and related materials (19 papers). Masayoshi Koike is often cited by papers focused on GaN-based semiconductor devices and materials (36 papers), Semiconductor Quantum Structures and Devices (20 papers) and Ga2O3 and related materials (19 papers). Masayoshi Koike collaborates with scholars based in Japan, South Korea and Russia. Masayoshi Koike's co-authors include Hiroshi Amano, Isamu Akasaki, Toshiyuki Tanaka, S. Sota, Hiroshi Sakai, S. Yamasaki, Naoki Shibata, S. Nagai, Hisaki Kato and Yumiko Takahashi and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and Journal of The Electrochemical Society.

In The Last Decade

Masayoshi Koike

69 papers receiving 2.0k citations

Hit Papers

Shortest wavelength semiconductor laser diode 1994 2026 2004 2015 1996 1994 100 200 300
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Shortest wavelength semiconductor laser diode
    1996 396 citations Isamu Akasaki, Toshiyuki Tanaka et al. profile →
  2. p-type conduction in Mg-doped GaN and Al0.08Ga0.92N grown by metalorganic vapor phase epitaxy
    1994 211 citations Toshiyuki Tanaka, A. Watanabe et al. Applied Physics Letters profile →

Peers

Masayoshi Koike
Kazunobu Kojima Japan
Y. Samson France
K.‐H. Müller Australia
D. Fuhrmann Germany
J. Pelzl Germany
K. Yamamoto Japan
E. M. Logothetis United States
U. Hömmerich United States
Guy Jacob France
R. Geick Germany
Kazunobu Kojima Japan
Masayoshi Koike
Citations per year, relative to Masayoshi Koike Masayoshi Koike (= 1×) peers Kazunobu Kojima

Countries citing papers authored by Masayoshi Koike

Since Specialization
Citations

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

Fields of papers citing papers by Masayoshi Koike

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masayoshi Koike

This figure shows the co-authorship network connecting the top 25 collaborators of Masayoshi Koike. A scholar is included among the top collaborators of Masayoshi Koike 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 Masayoshi Koike. Masayoshi Koike 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.
Koike, Masayoshi, et al.. (2024). Does salivary pH affect postoperative sore throat in the head‐down position of general anesthesia?. Journal of Oral Rehabilitation. 51(7). 1202–1206.
2.
Shirono, Katsuhiro, Hideyuki Tanaka, & Masayoshi Koike. (2022). Economic optimization of acceptance interval in conformity assessment: 2. Process with unknown systematic effect. Metrologia. 59(4). 45006–45006. 3 indexed citations
3.
Shirono, Katsuhiro, Hideyuki Tanaka, & Masayoshi Koike. (2022). Economic optimization of acceptance interval in conformity assessment: 1. Process with no systematic effect. Metrologia. 59(4). 45005–45005. 4 indexed citations
4.
5.
Lee, Jinhyun, et al.. (2007). Electroluminescence uniformity in green LEDs and dual color blue/green stacking LEDs. Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics. 4(7). 2814–2817. 3 indexed citations
6.
Ahn, Hyung Soo, Min Yang, Won-Jin Choi, et al.. (2007). Characterization of AlGaN, Te‐doped GaN and Mg‐doped GaN grown by hydride vapor phase epitaxy. Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics. 4(1). 133–136.
7.
Jmerik, V. N., A. M. Mizerov, T. V. Shubina, et al.. (2007). Plasma-assisted MBE of InGaN epilayers with atomically smooth and nanocolumnar morphology, grown on MOVPE GaN/Al2O3 templates. Journal of Crystal Growth. 301-302. 469–472. 9 indexed citations
8.
9.
Koike, Masayoshi, Naoki Shibata, Hisaki Kato, & Yumiko Takahashi. (2002). Development of high efficiency GaN-based multiquantum-well light-emitting diodes and their applications. IEEE Journal of Selected Topics in Quantum Electronics. 8(2). 271–277. 166 indexed citations
10.
Koike, Masayoshi, et al.. (2001). GaN-Based MQW Light Emitting Devices. physica status solidi (a). 188(1). 9–13. 1 indexed citations
11.
Koike, Masayoshi. (1999). Expression of Uncertainty in Measuremnet. Evaluation Methods of Uncertainty in Measurement.. Journal of the Japan Society for Precision Engineering. 65(7). 941–944. 2 indexed citations
12.
Ruvimov, S., Z. Liliental‐Weber, C. Dieker, et al.. (1997). Tem/Hrem Analysis of Defects in GaN Epitaxial Layers Grown by MOVPE on SiC and Sapphire. MRS Proceedings. 468. 17 indexed citations
13.
Kozawa, Takahiro, Tetsu Kachi, Takeshi Ohwaki, et al.. (1996). Dislocation Etch Pits in GaN Epitaxial Layers Grown on Sapphire Substrates. Journal of The Electrochemical Society. 143(1). L17–L19. 57 indexed citations
14.
Hasegawa, Masashi, et al.. (1995). Crystal growth of CuFeO2 by the floating-zone method. Journal of Crystal Growth. 148(1-2). 189–192. 24 indexed citations
15.
Tanaka, Toshiyuki, A. Watanabe, Hiroshi Amano, et al.. (1994). p-type conduction in Mg-doped GaN and Al0.08Ga0.92N grown by metalorganic vapor phase epitaxy. Applied Physics Letters. 65(5). 593–594. 211 indexed citations breakdown →
16.
Utsumi, Wataru, Masayoshi Koike, Humihiko Takei, et al.. (1993). Pressure Effect on the Crystal Structure and Electrical Conductivity of LiCuO2. Journal of Solid State Chemistry. 107(2). 507–512. 3 indexed citations
17.
Nishizawa, Jun‐ichi, Shinya Yoshida, & Masayoshi Koike. (1986). Observation of the characteristic surface morphology of In1-xGaxP epitaxial layers with large lattice mismatch to the GaP substrate. Journal of Crystal Growth. 78(2). 274–278. 6 indexed citations
18.
Nishizawa, J., et al.. (1983). Efficiency of GaAlAs heterostructure red light-emitting diodes. Journal of Applied Physics. 54(5). 2807–2812. 18 indexed citations
19.
Nishizawa, J., et al.. (1982). Luminescence study of a deep level in N-free GaP light-emitting diodes. Journal of Applied Physics. 53(8). 5876–5881. 8 indexed citations
20.
Nishizawa, Jun‐ichi, et al.. (1980). Deep Levels Studies of N-Free and N-Doped GaP Grown by TDM-CVP. Japanese Journal of Applied Physics. 19(1). 25–30. 13 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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