J. Ko

549 citations

41 papers · 390 · h-index 13

Impact in

Instrumentation top 10%
Electrical and Electronic Engineering top 10%
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Optical Network Technologies
- Advanced Semiconductor Detectors and Materials
- Advanced Fiber Optic Sensors
- Molecular Junctions and Nanostructures

Papers in

Electrical and Electronic Engineering 37
- Semiconductor Lasers and Optical Devices 32
- Photonic and Optical Devices 31
- Advanced Fiber Optic Sensors 8
- Optical Network Technologies 5
Atomic and Molecular Physics, and Optics 23
- Semiconductor Quantum Structures and Devices 16
- Advanced Fiber Laser Technologies 3

Co-authors: L.A. Coldren (30 shared papers)E.R. Hegblom (17 shared papers)O. Sjölund (9 shared papers)L. A. Coldren (6 shared papers)Yuliya Akulova (11 shared papers)B.J. Thibeault (8 shared papers)B. F. Levine (1 shared paper)J. A. Valdmanis (1 shared paper)
Journals: Electronics Letters (10 papers)IEEE Photonics Technology Letters (7 papers)Applied Physics Letters (5 papers)IEEE Journal of Quantum Electronics (3 papers)Advanced Materials (2 papers)
Partner nations: United States South Korea Germany

In The Last Decade

J. Ko

36 papers receiving 377 citations

Peers

Countries citing papers authored by J. Ko

Since Specialization

Citations

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

Fields of papers citing papers by J. Ko

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authors

The 25 scholars most cited alongside J. Ko, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with J. Ko Line = papers co-authored together J. Ko links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 41 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	A New Planar InGaAs–InAlAs Avalanche Photodiode IEEE Photonics Technology Letters ·B. F. Levine, R. N. Sacks, J. Ko, M. Jazwiecki, J. A. Valdmanis, Denise Günther, J. H. Meier	2006	50
2	Technique for integration of vertical cavity lasers and resonant photodetectors Applied Physics Letters ·O. Sjölund, D.A. Louderback, E.R. Hegblom, J. Ko, L. A. Coldren	1998	35
3	Generation of first-order terahertz optical sidebands in asymmetric coupled quantum wells Applied Physics Letters ·Chris C. Phillips, M. Y. Su, Mark S. Sherwin, J. Ko, L.A. Coldren	1999	35
4	Low-loss substrate-removed (SURE) optical waveguides in GaAs-AlGaAs epitaxial layers embedded in organic polymers IEEE Photonics Technology Letters ·S.R. Sakamoto, Cem Öztürk, Young Tae Byun, J. Ko, Nadir Dagli	1998	23
5	Comparison of optical losses in dielectric-apertured vertical-cavity lasers IEEE Photonics Technology Letters ·Philip D. Floyd, B.J. Thibeault, E.R. Hegblom, J. Ko, L.A. Coldren, Joachim Merz	1996	21
6	Flip-chip bonded arrays of monolithically integrated, microlensed vertical-cavity lasers and resonant photodetectors IEEE Photonics Technology Letters ·D.A. Louderback, O. Sjölund, E.R. Hegblom, J. Ko, L.A. Coldren	1999	18
7	Multimode WDM optical data links with monolithically integrated multiple-channel VCSEL and photodetector arrays IEEE Journal of Quantum Electronics ·S. Y. Hu, J. Ko, E.R. Hegblom, L.A. Coldren	1998	18
8	Modulation and free-space link characteristics of monolithically integrated vertical-cavity lasers and photodetectors with microlenses IEEE Journal of Selected Topics in Quantum Electronics ·D.A. Louderback, O. Sjölund, E.R. Hegblom, Shigeru Nakagawa, J. Ko, L.A. Coldren	1999	16
9	Resonant-cavity InGaAs/InAlGaAs/InP photodetector arrays for wavelength demultiplexing applications Applied Physics Letters ·S. Y. Hu, J. Ko, L.A. Coldren	1997	15
10	Low-temperature optimized vertical-cavity lasers with submilliamp threshold currents over the 77-370 K temperature range IEEE Photonics Technology Letters ·Yuliya Akulova, B.J. Thibeault, J. Ko, L.A. Coldren	1997	13
11	High-performance densely packed vertical-cavity photonic integrated emitter arrays for direct-coupled WDM applications IEEE Photonics Technology Letters ·Syn-Yem Hu, J. Ko, L.A. Coldren	1998	13
12	AlInGaAs/AlGaAs strained-layer 850 nm vertical-cavitylasers with very low thresholds Electronics Letters ·J. Ko, E.R. Hegblom, Yuliya Akulova, N.M. Margalit, L.A. Coldren	1997	13
13	Multiple wavelength vertical-cavity laser arrayemploying molecular beam epitaxy regrowth Electronics Letters ·T. Wipiejewski, J. Ko, B.J. Thibeault, L.A. Coldren	1996	12
14	Monolithic integration of substrate input/output resonant photodetectors and vertical-cavity lasers IEEE Journal of Quantum Electronics ·O. Sjölund, D.A. Louderback, E.R. Hegblom, J. Ko, L.A. Coldren	1999	10
15	Low-threshold 840-nm laterally oxidized vertical-cavity lasers using AlInGaAs-AlGaAs strained active layers IEEE Photonics Technology Letters ·J. Ko, E.R. Hegblom, Yuliya Akulova, B.J. Thibeault, L. A. Coldren	1997	10
16	Postgrowth tuning of semiconductor vertical cavities for multiple-wavelength laser arrays IEEE Journal of Quantum Electronics ·Andrea Fiore, Yuliya Akulova, J. Ko, E.R. Hegblom, L. A. Coldren	1999	9
17	Low threshold MBE-grown AlInGaAs/AlGaAs strainedmultiquantum-well lasers by rapid thermal annealing Electronics Letters ·J. Ko, C.-H. Chen, L.A. Coldren	1996	9
18	Threshold reduction by rapid thermal annealing inMBE-grown AlInGaAs multiquantum well lasers on GaAs Electronics Letters ·J. Ko, M.J. Mondry, D.B. Young, S. Y. Hu, L.A. Coldren, A. C. Gossard	1996	8
19	Monolithic integration of microlensed resonantphotodetectors and vertical cavity lasers Electronics Letters ·O. Sjölund, D.A. Louderback, E.R. Hegblom, J. Ko, L.A. Coldren	1998	8
20	Reversible Solar Heating and Radiative Cooling Devices via Mechanically Guided Assembly of 3D Macro/Microstructures Advanced Materials ·Su Eon Lee, Junyong Seo, Simon Kim, Jun Hyun Park, Ho Jun Jin, J. Ko, Jang Hwan Kim, Heemin Kang, Jin‐Tae Kim, Heon Lee, Bong Jae Lee, Bong Hoon Kim	2024	7

About J. Ko

J. Ko is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Spectroscopy, Biomedical Engineering and Automotive Engineering, having authored 41 papers that have together received 390 indexed citations. Recurring topics across this work include Semiconductor Lasers and Optical Devices (32 papers), Photonic and Optical Devices (31 papers), Semiconductor Quantum Structures and Devices (16 papers), Advanced Fiber Optic Sensors (8 papers), Optical Network Technologies (5 papers), Spectroscopy and Laser Applications (4 papers), Advanced Fiber Laser Technologies (3 papers) and Nanowire Synthesis and Applications (2 papers). The work is most often cited by research in Instrumentation (25 citations), Electrical and Electronic Engineering (361 citations), Atomic and Molecular Physics, and Optics (195 citations), Surfaces, Coatings and Films (16 citations) and Spectroscopy (26 citations). J. Ko has collaborated with scholars based in United States, South Korea and Germany. Frequent co-authors include L.A. Coldren, E.R. Hegblom, O. Sjölund, L. A. Coldren, Yuliya Akulova, B.J. Thibeault, B. F. Levine, J. A. Valdmanis, Mark S. Sherwin and Denise Günther. Their work appears in journals such as Electronics Letters, IEEE Photonics Technology Letters, Applied Physics Letters, IEEE Journal of Quantum Electronics and Advanced Materials.

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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