K. Takemasa

6.3k total citations
27 papers, 314 citations indexed

About

K. Takemasa is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Spectroscopy. According to data from OpenAlex, K. Takemasa has authored 27 papers receiving a total of 314 indexed citations (citations by other indexed papers that have themselves been cited), including 26 papers in Electrical and Electronic Engineering, 25 papers in Atomic and Molecular Physics, and Optics and 3 papers in Spectroscopy. Recurrent topics in K. Takemasa's work include Semiconductor Quantum Structures and Devices (21 papers), Semiconductor Lasers and Optical Devices (18 papers) and Photonic and Optical Devices (14 papers). K. Takemasa is often cited by papers focused on Semiconductor Quantum Structures and Devices (21 papers), Semiconductor Lasers and Optical Devices (18 papers) and Photonic and Optical Devices (14 papers). K. Takemasa collaborates with scholars based in Japan, United Kingdom and China. K. Takemasa's co-authors include T. Kamijoh, Hiroshi Wada, Masao Kobayashi, Takeshi Takamori, Kenichi Nishi, Mitsuru Sugawara, Yasuhiko Arakawa, Mitsuru Kubota, Tsuyoshi Yamamoto and Takeo Kageyama and has published in prestigious journals such as Physical review. B, Condensed matter, Applied Physics Letters and Applied Surface Science.

In The Last Decade

K. Takemasa

23 papers receiving 296 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
K. Takemasa Japan	11	291	277	35	18	17	27	314
Yongqiang Ning China	10	372 1.3×	258 0.9×	22 0.6×	17 0.9×	22 1.3×	82	417
Takashi Tadokoro Japan	13	639 2.2×	304 1.1×	26 0.7×	11 0.6×	23 1.4×	53	647
W. Ebert Germany	11	401 1.4×	183 0.7×	17 0.5×	13 0.7×	19 1.1×	34	411
K.-K. Law United States	11	301 1.0×	279 1.0×	64 1.8×	40 2.2×	27 1.6×	40	364
T.E. Reynolds United States	10	398 1.4×	253 0.9×	14 0.4×	16 0.9×	19 1.1×	20	415
M. Carré France	14	469 1.6×	324 1.2×	31 0.9×	17 0.9×	20 1.2×	46	498
J.L. Gentner Germany	13	275 0.9×	258 0.9×	35 1.0×	13 0.7×	37 2.2×	39	351
M. Chien United States	16	667 2.3×	313 1.1×	18 0.5×	16 0.9×	22 1.3×	51	696
Bingtian Guo United States	9	304 1.0×	230 0.8×	27 0.8×	18 1.0×	29 1.7×	26	342
K. Wünstel Germany	16	618 2.1×	323 1.2×	41 1.2×	22 1.2×	15 0.9×	53	655

Countries citing papers authored by K. Takemasa

Since Specialization

Citations

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

Fields of papers citing papers by K. Takemasa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of K. Takemasa

This figure shows the co-authorship network connecting the top 25 collaborators of K. Takemasa. A scholar is included among the top collaborators of K. Takemasa 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 K. Takemasa. K. Takemasa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Kim, Daehyun, Kenichi Nishi, K. Takemasa, et al.. (2023). Extreme temperature operation for broad bandwidth quantum-dot based superluminescent diodes. Applied Physics Letters. 122(3). 3 indexed citations

Thoms, S., Kenichi Nishi, K. Takemasa, et al.. (2021). Void engineering in epitaxially regrown GaAs-based photonic crystal surface emitting lasers by grating profile design. Applied Physics Letters. 118(2). 13 indexed citations

Li, Wei, I M Ross, Kenichi Nishi, et al.. (2018). Size anisotropy inhomogeneity effects in state-of-the-art quantum dot lasers. Applied Physics Letters. 113(1). 2 indexed citations

Matsuda, M., N. Yasuoka, Kenichi Nishi, et al.. (2018). Low-Noise Characteristics on 1.3-μm-Wavelength Quantum-Dot DFB Lasers Under External Optical Feedback. 1–2. 11 indexed citations

Kageyama, Takeo, Kenjiro Watanabe, K. Takemasa, et al.. (2016). Large modulation bandwidth (13.1 GHz) of 1.3 µm-range quantum dot lasers with high dot density and thin barrier layer. 1–2. 2 indexed citations

Childs, David, B. Stevens, Kenichi Nishi, et al.. (2016). Study of electro-absorption effects in 1300nm In(Ga)As/GaAs quantum dot materials. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 9742. 97420S–97420S. 3 indexed citations

Chen, Chun‐Ping, et al.. (2014). Novel Synthesis of A Wideband Filter Using Open-Short-Circuited Stepped Impedance Resonators. IEICE Technical Report; IEICE Tech. Rep.. 114(11). 11–16.

Takemasa, K., et al.. (2013). Numerical Study on Narrowband Bandpass Filter using Dual Modes of Terahertz Metallic Photonic Crystal Resonator. IEICE technical report. Speech. 113(26). 39–44. 1 indexed citations

Chen, Siming, Kang Zhou, Zhigang Zhang, et al.. (2013). Broad bandwidth emission from hybrid QW/QD structures. 18. 1–2. 1 indexed citations

10.

Kageyama, Takeo, Masaomi Yamaguchi, Hayato Kondo, et al.. (2012). Long-wavelength quantum dot FP and DFB lasers for high temperature applications. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 8277. 82770C–82770C. 11 indexed citations

11.

Kageyama, Takeo, Kenichi Nishi, Masaomi Yamaguchi, et al.. (2011). Extremely high temperature (220°C) continuous-wave operation of 1300-nm-range quantum-dot lasers. 1–1. 42 indexed citations

12.

Wada, Hiroshi, et al.. (2002). Effects of well number on temperature characteristics in 1.3-μm AlGaInAs/InP quantum well lasers. 137. 29–30.

13.

Takemasa, K., et al.. (1999). 1.3-μm AlGaInAs buried-heterostructure lasers. IEEE Photonics Technology Letters. 11(8). 949–951. 31 indexed citations

14.

Wada, Hiroshi, et al.. (1999). Effects of well number on temperature characteristics in 1.3-μm AlGaInAs-InP quantum-well lasers. IEEE Journal of Selected Topics in Quantum Electronics. 5(3). 420–427. 17 indexed citations

15.

Touati, Farid, et al.. (1999). Electrical properties and interface chemistry in the Ti/3C-SiC system. IEEE Transactions on Electron Devices. 46(3). 444–448. 10 indexed citations

16.

Takemasa, K., et al.. (1998). High-temperature operation of 1.3 µm AlGaInAsstrained multiplequantum well lasers. Electronics Letters. 34(12). 1231–1233. 27 indexed citations

17.

Takemasa, K., et al.. (1998). 1.3-μm AlGaInAs-AlGaInAs strained multiple-quantum-well lasers with a p-AlInAs electron stopper layer. IEEE Photonics Technology Letters. 10(4). 495–497. 30 indexed citations

18.

Takamori, Takeshi, K. Takemasa, & T. Kamijoh. (1997). Compositional abruptness of wet-oxidized AlAs/GaAs interface. Applied Surface Science. 117-118. 705–709. 2 indexed citations

19.

Takamori, Takeshi, K. Takemasa, & T. Kamijoh. (1996). Interface structure of selectively oxidized AlAs/GaAs. Applied Physics Letters. 69(5). 659–661. 39 indexed citations

20.

Yaguchi, Hiroyuki, et al.. (1994). Characterization of Ge/SiGe strained-barrier quantum-well structures using photoreflectance spectroscopy. Physical review. B, Condensed matter. 49(11). 7394–7399. 21 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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