Naoki Hara

2.4k total citations
133 papers, 1.7k citations indexed

About

Naoki Hara is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Condensed Matter Physics. According to data from OpenAlex, Naoki Hara has authored 133 papers receiving a total of 1.7k indexed citations (citations by other indexed papers that have themselves been cited), including 113 papers in Electrical and Electronic Engineering, 52 papers in Atomic and Molecular Physics, and Optics and 41 papers in Condensed Matter Physics. Recurrent topics in Naoki Hara's work include Radio Frequency Integrated Circuit Design (62 papers), Semiconductor Quantum Structures and Devices (46 papers) and GaN-based semiconductor devices and materials (39 papers). Naoki Hara is often cited by papers focused on Radio Frequency Integrated Circuit Design (62 papers), Semiconductor Quantum Structures and Devices (46 papers) and GaN-based semiconductor devices and materials (39 papers). Naoki Hara collaborates with scholars based in Japan, China and United States. Naoki Hara's co-authors include Toshihiro Ohki, T. Kikkawa, Kenji Imanishi, Masahito Kanamura, Kozo Makiyama, Tsuyoshi Takahashi, K. Joshin, Naoya Okamoto, Masaru Sato and Yasuhiro Nakasha and has published in prestigious journals such as Science, Journal of Applied Physics and Journal of the American Ceramic Society.

In The Last Decade

Naoki Hara

128 papers receiving 1.7k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Naoki Hara Japan 21 1.4k 908 438 431 389 133 1.7k
S.E. Babcock United States 22 487 0.3× 781 0.9× 679 1.6× 345 0.8× 574 1.5× 84 1.6k
P. Berberich Germany 21 326 0.2× 875 1.0× 551 1.3× 350 0.8× 484 1.2× 54 1.3k
Björn Magnusson Sweden 23 1.0k 0.7× 225 0.2× 375 0.9× 303 0.7× 479 1.2× 85 1.5k
L. Nazar United States 21 301 0.2× 1.2k 1.3× 575 1.3× 461 1.1× 603 1.6× 33 1.5k
B. H. Moeckly United States 19 279 0.2× 1.1k 1.3× 523 1.2× 457 1.1× 356 0.9× 62 1.4k
H. De Witte Germany 19 600 0.4× 756 0.8× 353 0.8× 423 1.0× 432 1.1× 97 1.3k
Hajime Ishikawa Japan 19 830 0.6× 579 0.6× 346 0.8× 385 0.9× 307 0.8× 89 1.4k
Osamu Michikami Japan 18 309 0.2× 584 0.6× 230 0.5× 235 0.5× 365 0.9× 94 977
R. D. Jacowitz United States 17 316 0.2× 1.6k 1.8× 576 1.3× 759 1.8× 587 1.5× 22 1.9k
M. Hong United States 19 242 0.2× 795 0.9× 503 1.1× 501 1.2× 376 1.0× 57 1.3k

Countries citing papers authored by Naoki Hara

Since Specialization
Citations

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

Fields of papers citing papers by Naoki Hara

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Naoki Hara

This figure shows the co-authorship network connecting the top 25 collaborators of Naoki Hara. A scholar is included among the top collaborators of Naoki Hara 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 Naoki Hara. Naoki Hara 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.
Nakasha, Yasuhiro, Shiro Ozaki, Naoya Okamoto, et al.. (2025). A 9.3% PAE, 9.2-dBm <i>P</i><sub>OUT</sub> power amplifier and -1.9-dB <i>G</i><sub>c</sub> upconverting mixer using InP-based MOS HEMTs for 300-GHz phased-array transmitters. IEICE Electronics Express. 22(5). 20240699–20240699.
2.
3.
Ozaki, Shiro, et al.. (2022). Low-Resistance and Low-Thermal-Budget Ohmic Contact by Introducing Periodic Microstructures for AlGaN/AlN/GaN HEMTs. IEEE Transactions on Electron Devices. 69(6). 3073–3078. 8 indexed citations
4.
Ozaki, Shiro, et al.. (2022). Surface-oxide-controlled InGaAs/InAlAs inverted-type metal-oxide-semiconductor high electron mobility transistors for sub-THz high-power amplifiers. Japanese Journal of Applied Physics. 62(SC). SC1033–SC1033. 5 indexed citations
5.
Okamoto, Naoya, Atsushi Takahashi, Yuichi Minoura, et al.. (2020). Deep GaN through-substrate via etching using Cl2/BCl3 inductively coupled plasma. Journal of Vacuum Science & Technology A Vacuum Surfaces and Films. 38(6). 4 indexed citations
6.
Ozaki, Shiro, Kozo Makiyama, Toshihiro Ohki, et al.. (2020). Improved DC performance and current stability of ultrathin-Al 2 O 3 /InAlN/GaN MOS-HEMTs with post-metallization-annealing process. Semiconductor Science and Technology. 35(3). 35027–35027. 13 indexed citations
7.
Takahashi, Tsuyoshi, Masaru Sato, Yasuhiro Nakasha, & Naoki Hara. (2015). Sensitivity Improvement in GaAsSb-Based Heterojunction Backward Diodes by Optimized Doping Concentration. IEEE Transactions on Electron Devices. 62(6). 1891–1897. 11 indexed citations
8.
Nakasha, Yasuhiro, Masaru Sato, Yoichi Kawano, et al.. (2014). InP HEMT amplifier design and packaging techniques for multi-10-Gbps data reception in sub-millimeter-wave bands. Asia-Pacific Microwave Conference. 1130–1132. 3 indexed citations
9.
Shiba, Shoichi, Masaru Sato, Hiroshi Matsumura, et al.. (2013). An F-band fundamental mixer using 75-nm InP HEMTs for precise spectrum analysis. European Microwave Integrated Circuit Conference. 137–140. 3 indexed citations
10.
Shiba, Shoichi, Masaru Sato, Toshihide Suzuki, et al.. (2012). F-Band Bidirectional Amplifier Using 75-nm InP HEMTs. 1–4. 7 indexed citations
11.
Takahashi, Tsuyoshi, Masaru Sato, Kozo Makiyama, et al.. (2011). Noise properties of asymmetrically recessed InP-based HEMTs for low-noise amplifiers. 1–4. 1 indexed citations
12.
Kawano, Yoichi, et al.. (2011). A millimeter-wave CMOS low noise amplifier using transformer neutralization techniques. Asia-Pacific Microwave Conference. 223–226. 12 indexed citations
13.
Nakasha, Yasuhiro, Naoki Hara, & Kiyomichi Araki. (2010). Performance analysis of a 10-Gb/s millimeter-wave impulse radio transmitter. Asia-Pacific Microwave Conference. 199–202. 1 indexed citations
14.
Nakasha, Yasuhiro, Masaru Sato, Yukio Kawano, et al.. (2009). $W$-band Transmitter and Receiver for 10-Gb/s Impulse Radio With an Optical-Fiber Interface. IEEE Transactions on Microwave Theory and Techniques. 57(12). 3171–3180. 29 indexed citations
15.
Kawano, Yukio, T. Suzuki, Masaru Sato, et al.. (2008). 20-GHz, 20-dBm pseudo-differential power amplifier in standard 90-nm CMOS. 1–4. 1 indexed citations
16.
Sawada, Koji, Naohiko Masaki, Shigeki Hayashi, et al.. (2005). Immunomodulatory effects of selective leucocytapheresis as a new adjunct to interferon‐α2b plus ribavirin combination therapy: a prospective study in patients with high plasma HCV viraemia. Journal of Viral Hepatitis. 12(3). 274–282. 7 indexed citations
17.
Suzuki, Toshihide, Yasuhiro Nakasha, H. Kano, et al.. (2003). Over 40-Gbit/s InP HEMT ICs for Optical Communication Systems. IEICE Transactions on Electronics. 86(10). 1916–1922. 1 indexed citations
18.
Masuda, S., Tetsuya Hirose, Tsuyoshi Takahashi, et al.. (2003). An over 110-GHz InP HEMT flip-chip distributed baseband amplifier with inverted microstrip line structure for optical transmission systems. 99–102. 21 indexed citations
19.
Tanaka, Hiroki, Naoki Hara, & Naoya Okamoto. (2000). Surface passivation of InGaP/InGaAs/GaAs pseudomorphic HEMTs with ultrathin GaS film. IEEE Transactions on Electron Devices. 47(12). 2284–2289. 16 indexed citations
20.
Yoshida, Masashi, et al.. (1997). Structure and Dielectric Properties of (Ca_ Nd_ )TiO_3. 36(11). 6818–6823. 2 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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