U. Keller

41.6k total citations · 7 hit papers
753 papers, 29.5k citations indexed

About

U. Keller is a scholar working on Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering and Spectroscopy. According to data from OpenAlex, U. Keller has authored 753 papers receiving a total of 29.5k indexed citations (citations by other indexed papers that have themselves been cited), including 716 papers in Atomic and Molecular Physics, and Optics, 585 papers in Electrical and Electronic Engineering and 66 papers in Spectroscopy. Recurrent topics in U. Keller's work include Advanced Fiber Laser Technologies (598 papers), Laser-Matter Interactions and Applications (371 papers) and Solid State Laser Technologies (357 papers). U. Keller is often cited by papers focused on Advanced Fiber Laser Technologies (598 papers), Laser-Matter Interactions and Applications (371 papers) and Solid State Laser Technologies (357 papers). U. Keller collaborates with scholars based in Switzerland, Germany and United States. U. Keller's co-authors include L. Gallmann, Thomas Südmeyer, R. Paschotta, N. Matuschek, M. Moser, M. Golling, K. J. Weingarten, Claudio Cirelli, Clemens Hönninger and Franz X. Kärtner and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

U. Keller

701 papers receiving 27.4k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Recent developments in compact ultrafast lasers

2003 1.7k citations U. Keller profile →
Semiconductor saturable absorber mirrors (SESAM's) for femtosecond to nanosecond pulse generation in solid-state lasers

1996 1.4k citations U. Keller, K. J. Weingarten et al. IEEE Journal of Selected Topics in Quantum Electronics profile →
Q-switching stability limits of continuous-wave passive mode locking

1999 638 citations U. Keller et al. profile →
Attosecond Ionization and Tunneling Delay Time Measurements in Helium

2008 594 citations Claudio Cirelli, U. Keller et al. Science profile →
Carrier-envelope offset phase control: A novel concept for absolute optical frequency measurement and ultrashort pulse generation

1999 551 citations U. Keller et al. profile →
Solid-state low-loss intracavity saturable absorber for Nd:YLF lasers: an antiresonant semiconductor Fabry–Perot saturable absorber

1992 500 citations U. Keller et al. Optics Letters profile →
Generation of intense, carrier-envelope phase-locked few-cycle laser pulses through filamentation

2004 466 citations U. Keller et al. profile →

Peers

Countries citing papers authored by U. Keller

Since Specialization

Citations

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

Fields of papers citing papers by U. Keller

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of U. Keller

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

#	Work	Indexed citations
1	Ultra-low noise spectral broadening of two combs in a single ANDi fiber 2025 ·APL Photonics ·(unknown), (unknown), Benjamin Willenberg, (unknown), (unknown), U. Keller, Alexander M. Heidt, C. R. Phillips	2
2	Broadband hyperspectral LiDAR with a free-running gigahertz dual-comb supercontinuum 2025 ·Optics Letters ·(unknown), (unknown), Benjamin Willenberg, Justinas Pupeikis, (unknown), Teemu Hakala, (unknown), Juha Hyyppä, (unknown), C. R. Phillips, U. Keller	5
3	Ultrafast 550-W average-power thin-disk laser oscillator 2024 ·Optica ·(unknown), Lukas Lang, C. R. Phillips, U. Keller	17
4	Scan-less 3D microscopy based on spatiotemporal encoding on a single-cavity dual-comb laser 2024 ·Optics Letters ·(unknown), Zhiwei Zhu, Benjamin Willenberg, Justinas Pupeikis, C. R. Phillips, U. Keller, Shih‐Chi Chen	3
5	Optically Pumped GaSb-Based Thin-Disk Laser Design Considerations for CW and Dual-Comb Operation at a Center Wavelength Around 2 $\rm \mu$m 2024 ·IEEE Journal of Selected Topics in Quantum Electronics ·(unknown), (unknown), (unknown), M. Golling, Benjamin Willenberg, C. R. Phillips, U. Keller	1
6	Ultrafast Transition from State-Blocking Dynamics to Electron Localization in Transition Metal β-Tungsten 2023 ·Physical Review Letters ·(unknown), (unknown), (unknown), (unknown), (unknown), L. Gallmann, U. Keller	8
7	Monolithically integrated femtosecond optical parametric oscillators 2023 ·Optica ·(unknown), Marc Jankowski, (unknown), Valentin J. Wittwer, Norbert Modsching, Carsten Langrock, C. R. Phillips, U. Keller, Thomas Südmeyer, M. M. Fejer	12
8	Single-cavity dual-modelocked 2.36-µm laser 2023 ·Optics Express ·Ajanta Barh, (unknown), (unknown), (unknown), M. Golling, C. R. Phillips, U. Keller	2
9	Low-Noise Femtosecond SESAM Modelocked Diode-Pumped Cr:ZnS Oscillator 2023 ·IEEE Journal of Quantum Electronics ·(unknown), Ajanta Barh, (unknown), Benjamin Willenberg, (unknown), M. Golling, C. R. Phillips, U. Keller	7
10	Dual-comb optical parametric oscillator in the mid-infrared based on a single free-running cavity 2022 ·Optics Express ·(unknown), (unknown), Justinas Pupeikis, Benjamin Willenberg, C. R. Phillips, U. Keller	14
11	Spatially multiplexed single-cavity dual-comb laser 2022 ·Optica ·Justinas Pupeikis, Benjamin Willenberg, (unknown), Abdelmjid Benayad, Patrice Camy, C. R. Phillips, U. Keller	50
12	High-speed interband cascade infrared photodetectors: photo-response saturation by a femtosecond oscillator 2021 ·Optics Express ·(unknown), Johannes Hillbrand, (unknown), Maximilian Beiser, Robert Weih, (unknown), C. R. Phillips, Benedikt Schwarz, G. Strasser, U. Keller	10
13	Femtosecond dual-comb Yb:CaF₂ laser from a single free-running polarization-multiplexed cavity for optical sampling applications 2020 ·Optics Express ·Benjamin Willenberg, Justinas Pupeikis, (unknown), (unknown), C. R. Phillips, U. Keller	42
14	Attosecond optical-field-enhanced carrier injection into the GaAs conduction band 2018 ·Nature Physics ·(unknown), Matteo Lucchini, Shunsuke Sato, Mikhail Volkov, Lamia Kasmi, (unknown), Ángel Rubio, L. Gallmann, U. Keller	125
15	Orientation-dependent stereo Wigner time delay and electron localization in a small molecule 2018 ·Science ·Jannie Vos, Laura Cattaneo, S. Patchkovskii, Tomáš Zimmermann, Claudio Cirelli, Matteo Lucchini, A. S. Kheifets, Alexandra S. Landsman, U. Keller	140
16	Attosecond coupled electron and nuclear dynamics in dissociative ionization of H2 2018 ·Nature Physics ·Laura Cattaneo, Jannie Vos, (unknown), Alicia Palacios, Sebastian Heuser, (unknown), Matteo Lucchini, Claudio Cirelli, Fernando Martı́n, U. Keller	113
17	Watt-level 10-gigahertz solid-state laser enabled by self-defocusing nonlinearities in an aperiodically poled crystal 2017 ·Nature Communications ·A. Mayer, C. R. Phillips, U. Keller	59
18	Moving towards 100 GHz from a passively mode-locked Er:Yb:glass laser at 1.5 μm 2007 ·A. E. H. Oehler, S. C. Zeller, (unknown), U. Keller, K. J. Weingarten	0
19	Passively mode-locked thin disk lasers reach 10 microjoules pulse energy at megahertz repetition rate and drive high field physics experiments 2007 ·S. V. Marchese, Shigeki Hashimoto, C. R. E. Baer, (unknown), Rachel Grange, M. Golling, Thomas Südmeyer, U. Keller, Guylaine Lépine, (unknown), B. Witzel	4
20	MIXSELs - a new class of ultrafast semiconductor lasers 2007 ·D. J. H. C. Maas, A.-R. Bellancourt, B. Rudin, M. Golling, H.J. Unold, Thomas Südmeyer, U. Keller	2

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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