Takahiro Numai

1.3k total citations
98 papers, 823 citations indexed

About

Takahiro Numai is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Surfaces, Coatings and Films. According to data from OpenAlex, Takahiro Numai has authored 98 papers receiving a total of 823 indexed citations (citations by other indexed papers that have themselves been cited), including 97 papers in Electrical and Electronic Engineering, 40 papers in Atomic and Molecular Physics, and Optics and 6 papers in Surfaces, Coatings and Films. Recurrent topics in Takahiro Numai's work include Photonic and Optical Devices (74 papers), Semiconductor Lasers and Optical Devices (66 papers) and Optical Network Technologies (33 papers). Takahiro Numai is often cited by papers focused on Photonic and Optical Devices (74 papers), Semiconductor Lasers and Optical Devices (66 papers) and Optical Network Technologies (33 papers). Takahiro Numai collaborates with scholars based in Japan and United States. Takahiro Numai's co-authors include I. Ogura, K. Kasahara, Hideo Kosaka, M. Sugimoto, I. Mito, K. Kurihara, S. Murata, Shinya Kojima, Mitsunori Sugimoto and K. Kasahara and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and Journal of The Electrochemical Society.

In The Last Decade

Takahiro Numai

90 papers receiving 792 citations

Peers

Countries citing papers authored by Takahiro Numai

Since Specialization

Citations

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

Fields of papers citing papers by Takahiro Numai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takahiro Numai

This figure shows the co-authorship network connecting the top 25 collaborators of Takahiro Numai. A scholar is included among the top collaborators of Takahiro Numai 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 Takahiro Numai. Takahiro Numai 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

#	Work	Indexed citations
1	Simulation of a ridge-type semiconductor laser with transversal diffraction gratings 2022 ·Optical and Quantum Electronics ·(unknown), Takahiro Numai	0
2	High Resonance Frequency in a Coupled Cavity DFB-LD with Asymmetric Grating Coupling Coefficients by Photon-Photon Resonance 2019 ·Takahiro Numai	1
3	High resonance frequency in a coupled cavity DFB-LD with phase-shifted/uniform gratings by photon-photon resonance 2017 ·Takahiro Numai	1
4	Resonance-shifted DFB-LD for asymmetric light output from front/rear facets 2016 ·Optik ·(unknown), Takahiro Numai	0
5	Fundamentals of Semiconductor Lasers 2014 ·Springer series in optical sciences ·Takahiro Numai	33
6	Ridge-Type Semiconductor Lasers with Antiguiding Layers for Horizontal Transverse Modes: Dependence on Space in the Antiguiding Layers 2009 ·Japanese Journal of Applied Physics ·(unknown), Takahiro Numai	4
7	Ridge-Type Semiconductor Lasers with Optical Antiguiding Layers for Horizontal Transverse Modes: Dependence on Step Positions 2009 ·Japanese Journal of Applied Physics ·(unknown), Takahiro Numai	1
8	Imprint Lithography with Pressing at Room Temperature 2006 ·Journal of The Electrochemical Society ·(unknown), Takashi Minemoto, Hideyuki Takakura, Yoshihiro Hamakawa, Takahiro Numai	1
9	Control of crystalline orientation of germanium by lateral graphoepitaxy on SiO2 microstructures 2005 ·Journal of Applied Physics ·(unknown), Takashi Minemoto, Hideyuki Takakura, Yoshihiro Hamakawa, Takahiro Numai	3
10	Analysis of signal voltage in a semiconductor ring laser gyro 2000 ·IEEE Journal of Quantum Electronics ·Takahiro Numai	19
11	Semiclassical Approach in the Analysis of Ring Laser: I. Derivation of Rate Equations Including Backscattering and Interference 2000 ·Japanese Journal of Applied Physics ·(unknown), Takahiro Numai	4
12	Analysis of repeated unequally spaced channels for FDM lightwave systems 2000 ·Journal of Lightwave Technology ·Takahiro Numai, (unknown)	34
13	Control of light-output polarization for surface-emitting-laser type device by strained active layer grown on misoriented substrate 1995 ·IEEE Journal of Quantum Electronics ·Takahiro Numai, K. Kurihara, Kelin J. Kuhn, Hideo Kosaka, I. Ogura, M. Kajita, Hirohisa Saito, K. Kasahara	20
14	Reduction in the series resistance of the distributed Bragg reflector in vertical cavities by using quasi-graded superlattices at the heterointerfaces 1993 ·Journal of Applied Physics ·K. Kurihara, Takahiro Numai, I. Ogura, (unknown), M. Sugimoto, K. Kasahara	30
15	Double-Mesa-Structure Vertical-to-Surface Transmission Electro-Photonic Device with a Vertical Cavity 1993 ·Japanese Journal of Applied Physics ·K. Kurihara, Takahiro Numai, I. Ogura, Hideo Kosaka, (unknown), K. Kasahara	10
16	Vertical to Surface Transmission Electro-Photonic Device (VSTEP) and Its Application to Optical Interconnection and Information Processing 1992 ·Transactions of the Institute of Electronics, Information and Communication Engineers ·K. Kasahara, Takahiro Numai, Hideo Kosaka, I. Ogura, K. Kurihara, Mitsunori Sugimoto	1
17	Free-space optical bus using cascaded vertical-to-surface transmission electrophotonic devices 1992 ·Applied Optics ·(unknown), Kazuhiro Yoshihara, I. Ogura, Takahiro Numai, K. Kasahara, Yuzo Ono	10
18	1.5 mu m tunable wavelength filter using phase-shift controllable DFB LD with wide tuning range and high constant gain 1988 ·European Conference on Optical Communication ·Takahiro Numai, S. Murata, T. Sasaki, I. Mito	2
19	1.5 μm wavelength tunable phase-shift controlled distributed feedback laser diode with constant spectral linewidth in tuning operation 1988 ·Electronics Letters ·Takahiro Numai, S. Murata, I. Mito	9
20	1.5 μm tunable wavelength filter with wide tuning range and high constant gain using a phase-controlled distributed feedback laser diode 1988 ·Applied Physics Letters ·Takahiro Numai, S. Murata, I. Mito	15

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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