J. Ko

526 citations

39 papers · 413 · h-index 13

Impact in

Electrical and Electronic Engineering top 10%
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Advanced Semiconductor Detectors and Materials
- Advanced Photonic Communication Systems
- Terahertz technology and applications
- Semiconductor materials and devices
Atomic and Molecular Physics, and Optics
- Semiconductor Quantum Structures and Devices
- Photorefractive and Nonlinear Optics

Papers in

Electrical and Electronic Engineering 38
- Semiconductor Lasers and Optical Devices 35
- Advanced Semiconductor Detectors and Materials 3
- Photonic and Optical Devices 3
- Terahertz technology and applications 2
- Advanced Photonic Communication Systems 1
Atomic and Molecular Physics, and Optics 4
- Semiconductor Quantum Structures and Devices 4
- Semiconductor materials and interfaces 1

Co-authors: L.A. Coldren (37 shared papers)Eric R. Hegblom (18 shared papers)O. Sjölund (9 shared papers)Yuliya A. Akulova (11 shared papers)Brian J. Thibeault (8 shared papers)Mark S. Sherwin (2 shared papers)M. Y. Su (2 shared papers)Chris C. Phillips (2 shared papers)
Journals: Electronics Letters (10 papers)IEEE Photonics Technology Letters (7 papers)Applied Physics Letters (5 papers)IEEE Journal of Quantum Electronics (3 papers)IEEE Journal of Selected Topics in Quantum Electronics (1 paper)
Partner nations: United States Germany United Kingdom

In The Last Decade

J. Ko

35 papers receiving 392 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 39 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, Robert N. Sacks, J. Ko, M. Jazwiecki, Janis A. Valdmanis +2 others	2006	51
2	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	38
3	Technique for integration of vertical cavity lasers and resonant photodetectors Applied Physics Letters ·O. Sjölund, Duane A. Louderback, Eric R. Hegblom, J. Ko, L.A. Coldren	1998	37
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	29
5	Comparison of optical losses in dielectric-apertured vertical-cavity lasers IEEE Photonics Technology Letters ·Philip D. Floyd, Brian J. Thibeault, Eric R. Hegblom, J. Ko, L.A. Coldren, Joachim Merz	1996	21
6	Multimode WDM optical data links with monolithically integrated multiple-channel VCSEL and photodetector arrays IEEE Journal of Quantum Electronics ·S. Y. Hu, J. Ko, Eric R. Hegblom, L.A. Coldren	1998	20
7	Flip-chip bonded arrays of monolithically integrated, microlensed vertical-cavity lasers and resonant photodetectors IEEE Photonics Technology Letters ·Duane A. Louderback, O. Sjölund, Eric R. Hegblom, J. Ko, L.A. Coldren	1999	19
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 ·Duane A. Louderback, O. Sjölund, Eric R. Hegblom, Shigeru Nakagawa, J. Ko, L.A. Coldren	1999	17
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 A. Akulova, Brian J. Thibeault, J. Ko, L.A. Coldren	1997	15
11	Multiple wavelength vertical-cavity laser arrayemploying molecular beam epitaxy regrowth Electronics Letters ·Torsten Wipiejewski, J. Ko, Brian J. Thibeault, L.A. Coldren	1996	14
12	AlInGaAs/AlGaAs strained-layer 850 nm vertical-cavitylasers with very low thresholds Electronics Letters ·J. Ko, Eric R. Hegblom, Yuliya A. Akulova, Near M. Margalit, L.A. Coldren	1997	14
13	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
14	Low-threshold 840-nm laterally oxidized vertical-cavity lasers using AlInGaAs-AlGaAs strained active layers IEEE Photonics Technology Letters ·J. Ko, Eric R. Hegblom, Yuliya A. Akulova, Brian J. Thibeault, L.A. Coldren	1997	12
15	Monolithic integration of substrate input/output resonant photodetectors and vertical-cavity lasers IEEE Journal of Quantum Electronics ·O. Sjölund, Duane A. Louderback, Eric R. Hegblom, J. Ko, L.A. Coldren	1999	11
16	Low threshold MBE-grown AlInGaAs/AlGaAs strainedmultiquantum-well lasers by rapid thermal annealing Electronics Letters ·J. Ko, C.-H. Chen, L.A. Coldren	1996	10
17	Postgrowth tuning of semiconductor vertical cavities for multiple-wavelength laser arrays IEEE Journal of Quantum Electronics ·Andrea Fiore, Yuliya A. Akulova, J. Ko, Eric R. Hegblom, L.A. Coldren	1999	9
18	Threshold reduction by rapid thermal annealing inMBE-grown AlInGaAs multiquantum well lasers on GaAs Electronics Letters ·J. Ko, Mark J. Mondry, D. Bruce Young, S. Y. Hu, L.A. Coldren, Arthur C. Gossard	1996	8
19	1.55 µm pie-shaped resonant-cavity photodetectorarrays fordirect-coupled wavelength demultiplexing applications Electronics Letters ·S. Y. Hu, J. Ko, L.A. Coldren	1997	8
20	Monolithic integration of microlensed resonantphotodetectors and vertical cavity lasers Electronics Letters ·O. Sjölund, Duane A. Louderback, Eric R. Hegblom, J. Ko, L.A. Coldren	1998	8

About J. Ko

J. Ko is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Nuclear Energy and Engineering, Waste Management and Disposal and Infectious Diseases, having authored 39 papers that have together received 413 indexed citations. Recurring topics across this work include Semiconductor Lasers and Optical Devices (35 papers), Semiconductor Quantum Structures and Devices (4 papers), Advanced Semiconductor Detectors and Materials (3 papers), Photonic and Optical Devices (3 papers), Terahertz technology and applications (2 papers), Semiconductor materials and interfaces (1 paper) and Advanced Photonic Communication Systems (1 paper). The work is most often cited by research in Electrical and Electronic Engineering (372 citations), Atomic and Molecular Physics, and Optics (88 citations), Instrumentation (5 citations), Spectroscopy (8 citations) and Surfaces, Coatings and Films (3 citations). J. Ko has collaborated with scholars based in United States, Germany and United Kingdom. Frequent co-authors include L.A. Coldren, Eric R. Hegblom, O. Sjölund, Yuliya A. Akulova, Brian J. Thibeault, Mark S. Sherwin, M. Y. Su, Chris C. Phillips, Janis A. Valdmanis and B. F. Levine. Their work appears in journals such as Electronics Letters, IEEE Photonics Technology Letters, Applied Physics Letters, IEEE Journal of Quantum Electronics and IEEE Journal of Selected Topics in Quantum Electronics.

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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