Hiroaki Okagawa

1.1k total citations
22 papers, 949 citations indexed

About

Hiroaki Okagawa is a scholar working on Condensed Matter Physics, Electronic, Optical and Magnetic Materials and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Hiroaki Okagawa has authored 22 papers receiving a total of 949 indexed citations (citations by other indexed papers that have themselves been cited), including 22 papers in Condensed Matter Physics, 12 papers in Electronic, Optical and Magnetic Materials and 9 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Hiroaki Okagawa's work include GaN-based semiconductor devices and materials (22 papers), Ga2O3 and related materials (12 papers) and Semiconductor Quantum Structures and Devices (7 papers). Hiroaki Okagawa is often cited by papers focused on GaN-based semiconductor devices and materials (22 papers), Ga2O3 and related materials (12 papers) and Semiconductor Quantum Structures and Devices (7 papers). Hiroaki Okagawa collaborates with scholars based in Japan and Germany. Hiroaki Okagawa's co-authors include Tsunemasa Taguchi, Kazuyuki Tadatomo, Hiromitsu Kudo, Takashi Tsunekawa, Munehiro Kato, Yoshiyuki Imada, Youichiro Ohuchi, Yoichi Yamada, Norihide Yamada and Masakazu Nagashima and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and Physical Review B.

In The Last Decade

Hiroaki Okagawa

22 papers receiving 914 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hiroaki Okagawa Japan 14 824 503 383 371 248 22 949
T. Paskova United States 19 903 1.1× 444 0.9× 426 1.1× 292 0.8× 318 1.3× 52 992
Carl J. Neufeld United States 12 983 1.2× 378 0.8× 379 1.0× 436 1.2× 366 1.5× 25 1.1k
G. Nataf France 15 810 1.0× 571 1.1× 445 1.2× 363 1.0× 402 1.6× 31 1.1k
Sheng‐Horng Yen Taiwan 16 924 1.1× 396 0.8× 415 1.1× 544 1.5× 236 1.0× 35 1.0k
Atsushi Motogaito Japan 11 693 0.8× 450 0.9× 379 1.0× 219 0.6× 223 0.9× 32 841
Samantha C. Cruz United States 11 1.0k 1.3× 426 0.8× 434 1.1× 456 1.2× 403 1.6× 21 1.2k
C. A. Tran Canada 19 728 0.9× 461 0.9× 351 0.9× 650 1.8× 595 2.4× 69 1.2k
Y.P. Hsu Taiwan 17 577 0.7× 379 0.8× 215 0.6× 207 0.6× 307 1.2× 24 700
Satoru Nagao Japan 10 623 0.8× 348 0.7× 364 1.0× 263 0.7× 340 1.4× 21 786
Michael A. Banas United States 10 1.0k 1.2× 482 1.0× 431 1.1× 487 1.3× 359 1.4× 18 1.1k

Countries citing papers authored by Hiroaki Okagawa

Since Specialization
Citations

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

Fields of papers citing papers by Hiroaki Okagawa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroaki Okagawa

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroaki Okagawa. A scholar is included among the top collaborators of Hiroaki Okagawa 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 Hiroaki Okagawa. Hiroaki Okagawa 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.
Kudo, Hiromitsu, et al.. (2012). Internal Quantum Efficiency and Nonradiative Recombination Rate in InGaN-Based Near-Ultraviolet Light-Emitting Diodes. Japanese Journal of Applied Physics. 51(7R). 72102–72102. 55 indexed citations
2.
Kudo, Hiromitsu, et al.. (2012). Internal Quantum Efficiency and Nonradiative Recombination Rate in InGaN-Based Near-Ultraviolet Light-Emitting Diodes. Japanese Journal of Applied Physics. 51(7R). 72102–72102. 42 indexed citations
3.
Yamada, Yoichi, Takuya Saito, Nobuo Kato, et al.. (2009). Spatially separated intrinsic emission components inInxGa1−xNternary alloys. Physical Review B. 80(19). 15 indexed citations
4.
Okagawa, Hiroaki, et al.. (2007). High-Efficient and High-Power GaN-Based 405 nm Laser Diodes. The Review of Laser Engineering. 35(2). 69–72. 3 indexed citations
5.
Tomita, Nobuyuki, et al.. (2006). Investigation of optical properties of InGaN multiple quantum wells on free-standing GaN substrates grown by metalorganic vapor phase epitaxy. Journal of Crystal Growth. 298. 518–521. 2 indexed citations
6.
Tadatomo, Kazuyuki, Hiroaki Okagawa, Youichiro Ohuchi, et al.. (2004). High-output power near-ultraviolet and violet light-emitting diodes fabricated on patterned sapphire substrates using metalorganic vapor phase epitaxy. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 5187. 243–243. 8 indexed citations
7.
Kudo, Hiromitsu, Youichiro Ohuchi, Takashi Tsunekawa, et al.. (2003). Demonstration of high-efficient InGaN-based violet light-emitting diodes with an external-quantum efficiency of more than 40%. physica status solidi (a). 200(1). 95–98. 14 indexed citations
8.
Watanabe, Satoshi, Norihide Yamada, Masakazu Nagashima, et al.. (2003). Internal quantum efficiency of highly-efficient InxGa1−xN-based near-ultraviolet light-emitting diodes. Applied Physics Letters. 83(24). 4906–4908. 252 indexed citations
9.
Tanaka, Satoru, et al.. (2003). GaN quantum dot UV light emitting diode. MRS Proceedings. 798. 2 indexed citations
10.
Tadatomo, Kazuyuki, Hiroaki Okagawa, Youichiro Ohuchi, et al.. (2003). High Output Power Near-Ultraviolet and Violet Light-Emitting Diodes Fabricated on Patterned Sapphire Substrates Using Metalorganic Vapor Phase Epitaxy. Journal of Light & Visual Environment. 27(3). 140–145. 6 indexed citations
11.
Tanaka, Satoru, et al.. (2003). A UV Light-Emitting Diode Incorporating GaN Quantum Dots. Japanese Journal of Applied Physics. 42(Part 2, No. 8A). L885–L887. 41 indexed citations
12.
Naito, Hiroyoshi, Hiromitsu Kudo, Yoichi Yamada, et al.. (2003). Temperature dependence of Stokes shift in InxGa1−xN epitaxial layers. Journal of Applied Physics. 93(3). 1642–1646. 27 indexed citations
13.
Tadatomo, Kazuyuki, Hiroaki Okagawa, Youichiro Ohuchi, et al.. (2001). High Output Power InGaN Ultraviolet Light-Emitting Diodes Fabricated on Patterned Substrates Using Metalorganic Vapor Phase Epitaxy. Japanese Journal of Applied Physics. 40(6B). L583–L583. 314 indexed citations
14.
Tadatomo, Kazuyuki, Hiroaki Okagawa, Takashi Tsunekawa, et al.. (2001). High Output Power InGaN Ultraviolet Light-Emitting Diodes Fabricated on Patterned Substrates Using Metalorganic Vapor Phase Epitaxy. physica status solidi (a). 188(1). 121–125. 68 indexed citations
15.
Tadatomo, Kazuyuki, et al.. (1999). Hydrogen and Nitrogen Ambient Effects on Epitaxial Lateral Overgrowth (ELO) of GaN VIA Metalorganic Vapor-Phase Epitaxy (Movpe). MRS Internet Journal of Nitride Semiconductor Research. 4(S1). 118–123. 3 indexed citations
16.
Tadatomo, Kazuyuki, Hiroaki Okagawa, Hirotaka Itoh, et al.. (1998). Hydrogen and Nitrogen Ambient Effects on Epitaxial Lateral Overgrowth (ELO) of GaN Via Metalorganic Vapor-Phase Epitaxy (MOVPE). MRS Proceedings. 537. 5 indexed citations
17.
Hiramatsu, K., T. Shibata, Nobuhiko Sawaki, et al.. (1997). Selective Area Growth of GaN by MOVPE and HVPE. MRS Proceedings. 482. 13 indexed citations
18.
Okagawa, Hiroaki, et al.. (1992). Visible light-emitting diodes consisting of AlP–GaP short-period superlattices. Electronics Letters. 28(9). 836–838. 7 indexed citations
19.
Okagawa, Hiroaki, et al.. (1992). Band Discontinuity at AlxGa1-xP/GaP Heterointerfaces Studied by Capacitance Measurements. Japanese Journal of Applied Physics. 31(8B). L1161–L1161. 16 indexed citations
20.
Okagawa, Hiroaki, et al.. (1992). MOVPE growth of short-period superlattices of AlP-GaP and its application for light-emitting diodes. Journal of Crystal Growth. 124(1-4). 772–776. 24 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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