M. Okajima

1.1k total citations
57 papers, 743 citations indexed

About

M. Okajima is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Materials Chemistry. According to data from OpenAlex, M. Okajima has authored 57 papers receiving a total of 743 indexed citations (citations by other indexed papers that have themselves been cited), including 52 papers in Electrical and Electronic Engineering, 32 papers in Atomic and Molecular Physics, and Optics and 12 papers in Materials Chemistry. Recurrent topics in M. Okajima's work include Semiconductor Quantum Structures and Devices (28 papers), Semiconductor Lasers and Optical Devices (28 papers) and Photonic and Optical Devices (19 papers). M. Okajima is often cited by papers focused on Semiconductor Quantum Structures and Devices (28 papers), Semiconductor Lasers and Optical Devices (28 papers) and Photonic and Optical Devices (19 papers). M. Okajima collaborates with scholars based in Japan and United States. M. Okajima's co-authors include Bipul C. Paul, Shinobu Fujita, G. Hatakoshi, Kazuhiko Itaya, Yoshio Nishi, Masayuki Ishikawa, H.‐S. Philip Wong, Takao Tohda, Yukie Nishikawa and Yuki Uematsu and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and IEEE Journal of Solid-State Circuits.

In The Last Decade

M. Okajima

52 papers receiving 712 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
M. Okajima Japan 16 660 314 227 113 64 57 743
E. Leobandung United States 18 1.1k 1.7× 480 1.5× 363 1.6× 262 2.3× 19 0.3× 51 1.3k
Ajey P. Jacob United States 15 638 1.0× 349 1.1× 363 1.6× 122 1.1× 55 0.9× 60 899
Jai Kwang Shin South Korea 13 663 1.0× 259 0.8× 450 2.0× 169 1.5× 177 2.8× 20 1.0k
Robert Havemann United States 14 587 0.9× 104 0.3× 98 0.4× 87 0.8× 30 0.5× 57 707
K. Y. Hsieh Taiwan 17 809 1.2× 383 1.2× 369 1.6× 112 1.0× 225 3.5× 67 1.1k
Keon‐Ho Yoo South Korea 15 456 0.7× 428 1.4× 300 1.3× 125 1.1× 71 1.1× 73 773
John J. Plombon United States 10 420 0.6× 177 0.6× 315 1.4× 90 0.8× 16 0.3× 22 608
K. Rim United States 16 1.5k 2.2× 281 0.9× 367 1.6× 382 3.4× 31 0.5× 41 1.7k
Yusuke Shuto Japan 14 586 0.9× 301 1.0× 346 1.5× 48 0.4× 72 1.1× 51 836
Masiar Sistani Austria 16 496 0.8× 242 0.8× 157 0.7× 297 2.6× 11 0.2× 60 614

Countries citing papers authored by M. Okajima

Since Specialization
Citations

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

Fields of papers citing papers by M. Okajima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of M. Okajima

This figure shows the co-authorship network connecting the top 25 collaborators of M. Okajima. A scholar is included among the top collaborators of M. Okajima 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 M. Okajima. M. Okajima 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.
Okajima, M., et al.. (2012). Production of Compensation Free SOG Silicon Feedstock by Metallurgical Refinement. ECS Transactions. 41(46). 17–25. 2 indexed citations
2.
Paul, Bipul C., et al.. (2007). Impact of Process Variation on Nanowire and Nanotube Device Performance. 4. 269–270. 65 indexed citations
3.
Paul, Bipul C., Shinobu Fujita, M. Okajima, & Thomas C. M. Lee. (2006). A Compact Model of Ballistic CNFET for Circuit Simulation. TechConnect Briefs. 3(2006). 846–849. 1 indexed citations
4.
Okazaki, Kiyoshi, Hiroshi Maiwa, Manabu Hagiwara, & M. Okajima. (1994). Pseudo-pyroelectric current and microwave properties of (Sr,Ba)TiO3ceramics. Ferroelectrics. 154(1). 183–188.
5.
Rennie, J., M. Okajima, Kazuhiko Itaya, & G. Hatakoshi. (1994). Measurement of the barrier height of a multiple quantum barrier (MQB). IEEE Journal of Quantum Electronics. 30(12). 2781–2789. 8 indexed citations
6.
Nishikawa, Yukie, Mariko Suzuki, & M. Okajima. (1993). Effects of Growth Parameters on Oxygen Incorporation into InGaAlP Grown by Metalorganic Chemical Vapor Deposition. Japanese Journal of Applied Physics. 32(1S). 498–498. 15 indexed citations
7.
Itaya, Kazuhiko, G. Hatakoshi, Masayuki Ishikawa, et al.. (1993). Remarkable improvement in the temperature characteristics of GaAs lasers using an InGaAlP cladding layer. IEEE Journal of Quantum Electronics. 29(6). 2068–2073. 2 indexed citations
8.
Suzuki, Mariko, Kazuhiko Itaya, Yukie Nishikawa, Hideto Sugawara, & M. Okajima. (1993). Reduction of residual oxygen incorporation and deep levels by substrate misorientation in InGaAlP alloys. Journal of Crystal Growth. 133(3-4). 303–308. 21 indexed citations
9.
Watanabe, Minoru, J. Rennie, M. Okajima, & G. Hatakoshi. (1993). Improvement in the temperature characteristics of 630 nm band InGaAlP multiquantum-well laser diodes using a 15° misoriented substrate. Electronics Letters. 29(3). 250–252. 7 indexed citations
10.
Rennie, J., et al.. (1992). Improvement, due to a systematically designed mq barrier structure, in the temperature characteristics of a short wavelength InGaAlP laser.. Conference on Lasers and Electro-Optics. 1 indexed citations
11.
Watanabe, Minoru, et al.. (1992). Highly Reliable Operation of InGaP/InGaAlP Multi-Quantum-Well Visible Laser Diodes. Japanese Journal of Applied Physics. 31(10A). L1399–L1399. 8 indexed citations
12.
Rennie, J., et al.. (1992). Room temperature CW operation of orange light (625 nm) emitting InGaAlP laser. Electronics Letters. 28(21). 1950–1952. 6 indexed citations
13.
Okajima, M. & Takao Tohda. (1992). Heteroepitaxial growth of MnS on GaAs substrates. Journal of Crystal Growth. 117(1-4). 810–815. 47 indexed citations
14.
Itaya, Kazuhiko, et al.. (1991). High-power (106 mW) CW operation of transverse-mode stabilised InGaAlP laser diodes with strained In 0.62 Ga 0.38 P active layer. Electronics Letters. 27(18). 1660–1661. 19 indexed citations
15.
Itaya, Kazuhiko, et al.. (1991). High-temperature operation of high-power InGaAlP visible light laser diodes with an In0.5+δGa0.5−δP active layer. Applied Physics Letters. 59(2). 149–151. 16 indexed citations
16.
Okajima, M., Yukio Watanabe, Yukie Nishikawa, et al.. (1991). A real-index guided InGaAlP visible laser diode with a small beam astigmatism. IEEE Journal of Quantum Electronics. 27(6). 1491–1495. 6 indexed citations
17.
Okajima, M., et al.. (1988). Development of bottom-blowing nozzle for combined blowing converter.. Transactions of the Iron and Steel Institute of Japan. 28(1). 49–58. 6 indexed citations
18.
Nakamura, Masaru, et al.. (1984). LED linearisation for video bandwidth transmission employing a monolithically integrated PIN-PD. Electronics Letters. 20(16). 651–653. 1 indexed citations
19.
20.
Okajima, M., et al.. (1982). Buried Multi-Heterostructure (BMH) GaAlAs Laser. Japanese Journal of Applied Physics. 21(S1). 353–353.

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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