Osamu Kojima

815 total citations
81 papers, 636 citations indexed

About

Osamu Kojima is a scholar working on Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering and Materials Chemistry. According to data from OpenAlex, Osamu Kojima has authored 81 papers receiving a total of 636 indexed citations (citations by other indexed papers that have themselves been cited), including 69 papers in Atomic and Molecular Physics, and Optics, 44 papers in Electrical and Electronic Engineering and 18 papers in Materials Chemistry. Recurrent topics in Osamu Kojima's work include Semiconductor Quantum Structures and Devices (65 papers), Semiconductor Lasers and Optical Devices (18 papers) and Spectroscopy and Quantum Chemical Studies (15 papers). Osamu Kojima is often cited by papers focused on Semiconductor Quantum Structures and Devices (65 papers), Semiconductor Lasers and Optical Devices (18 papers) and Spectroscopy and Quantum Chemical Studies (15 papers). Osamu Kojima collaborates with scholars based in Japan, United Kingdom and United States. Osamu Kojima's co-authors include Takashi Kita, Osamu Wada, Masaaki Nakayama, Tomoya Inoue, K. Mizoguchi, Kouichi Akahane, Weiguo Hu, M. Hopkinson, Chao‐Yuan Jin and Toshiro Isu and has published in prestigious journals such as Physical review. B, Condensed matter, Applied Physics Letters and Journal of Applied Physics.

In The Last Decade

Osamu Kojima

72 papers receiving 625 citations

Peers

Osamu Kojima
Justin R. Sparks United States
F. Villuendas Spain
V. Hock Germany
V. N. Poroshin Ukraine
Johann Trolès France
Rajour Tanyi Ako Australia
Osamu Nakada Japan
Samik Mukherjee Canada
Justin R. Sparks United States
Osamu Kojima
Citations per year, relative to Osamu Kojima Osamu Kojima (= 1×) peers Justin R. Sparks

Countries citing papers authored by Osamu Kojima

Since Specialization
Citations

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

Fields of papers citing papers by Osamu Kojima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Osamu Kojima

This figure shows the co-authorship network connecting the top 25 collaborators of Osamu Kojima. A scholar is included among the top collaborators of Osamu Kojima 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 Osamu Kojima. Osamu Kojima 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.
Kaizu, Toshiyuki, Osamu Kojima, Yasuo Minami, et al.. (2024). Lateral photoconductivity of InAs/GaAs quantum dots for 1.5 μm-wavelength excitation photoconductive terahertz antenna devices. Japanese Journal of Applied Physics. 63(8). 82002–82002. 1 indexed citations
2.
Kojima, Osamu, et al.. (2023). Generation of nonlinear polarization to emit terahertz waves in above gap states in GaSb/AlGaSb multiple quantum wells. Applied Physics Express. 16(5). 51002–51002.
3.
4.
Kojima, Osamu, Takashi Kita, Matthew J. Steer, & R. A. Hogg. (2021). Modulation of exciton states through resonant excitation by continuous wave lasers in a GaAs/AlAs multiple quantum well. Journal of Physics D Applied Physics. 54(33). 335106–335106.
5.
Kojima, Osamu, et al.. (2020). Electron transport in a silicon crystal observed by energy transfer luminescence. Japanese Journal of Applied Physics. 59(8). 82005–82005. 1 indexed citations
6.
Stevens, B., et al.. (2019). Broadband THz absorption spectrometer based on excitonic nonlinear optical effects. Light Science & Applications. 8(1). 29–29. 10 indexed citations
7.
Kojima, Osamu, et al.. (2019). Characterisation of thin-layer resonant tunnelling diodes grown by MOVPE. 7671. 8–8. 4 indexed citations
8.
Kojima, Osamu, Yuki Iwasaki, Takashi Kita, & Kouichi Akahane. (2017). Effects of non-exciton components excited by broadband pulses on quantum beats in a GaAs/AlAs multiple quantum well. Scientific Reports. 7(1). 41496–41496. 3 indexed citations
9.
Harada, Yukihiro, et al.. (2011). Extremely uniform bound exciton states in nitrogen δ-doped GaAs studied by photoluminescence spectroscopy in external magnetic fields. Journal of Applied Physics. 110(8). 10 indexed citations
10.
Kojima, Osamu, et al.. (2011). Dynamics of above-barrier state excitons in multi-stacked quantum dots. Journal of Applied Physics. 110(9). 1 indexed citations
11.
Kojima, Osamu, et al.. (2010). Temperature dependence of photoluminescence characteristics of excitons in stacked quantum dots and quantum dot chains. Journal of Applied Physics. 107(7). 9 indexed citations
12.
Hu, Weiguo, Tomoya Inoue, Osamu Kojima, & Takashi Kita. (2010). Effects of absorption coefficients and intermediate-band filling in InAs/GaAs quantum dot solar cells. Applied Physics Letters. 97(19). 39 indexed citations
13.
Kojima, Osamu, et al.. (2008). Photoluminescence characteristics of quantum dots with electronic states interconnected along growth direction. Journal of Applied Physics. 103(11). 31 indexed citations
14.
Inoue, Tomoya, et al.. (2008). Effects of indium segregation on optical properties of nitrogen-doped InAs/GaAs quantum dots. Journal of Applied Physics. 104(10). 4 indexed citations
15.
Kita, Takashi, et al.. (2007). Photoluminescence dynamics of coupled quantum dots. Journal of Luminescence. 128(5-6). 975–977. 4 indexed citations
16.
Kojima, Osamu, Toshiro Isu, Junko Ishi‐Hayase, Masahide Sasaki, & Masahiro Tsuchiya. (2007). Ultrafast nonlinear optical response of weakly confined excitons in GaAs thin films. Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics. 4(5). 1731–1734. 2 indexed citations
17.
Kojima, Osamu, K. Mizoguchi, & Masaaki Nakayama. (2004). Enhancement of coherent longitudinal optical phonon oscillations in aGaAs∕AlAsmultiple quantum well due to intersubband energy tuning under an electric field. Physical Review B. 70(23). 14 indexed citations
18.
Nomura, Takeo, et al.. (1997). Study of Super Olefin Polymer by Nano-Order Structure. IX. Toughness of Super Olefin Polymer.. KOBUNSHI RONBUNSHU. 54(5). 295–300.
19.
Ochiai, Hiroshi, et al.. (1990). Dissociation of poly(allylammonium) cations in salt solutions. Journal of Polymer Science Part B Polymer Physics. 28(2). 233–240. 43 indexed citations
20.
Kojima, Osamu, et al.. (1984). Development of Steel HT60 with Low Susceptibility to Liquid Zinc Embrittlement for Power Transmission Tower. Tetsu-to-Hagane. 70(10). 1445–1451. 3 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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