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.
Power dependence of upconversion luminescence in lanthanide and transition-metal-ion systems
20001.9k citationsMarkus Pollnau, Hans U. Güdel et al.profile →
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late)
cites ·
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Countries citing papers authored by Markus Pollnau
Since
Specialization
Citations
This map shows the geographic impact of Markus Pollnau'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 Markus Pollnau with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Markus Pollnau more than expected).
This network shows the impact of papers produced by Markus Pollnau. 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 Markus Pollnau. The network helps show where Markus Pollnau may publish in the future.
Co-authorship network of co-authors of Markus Pollnau
This figure shows the co-authorship network connecting the top 25 collaborators of Markus Pollnau.
A scholar is included among the top collaborators of Markus Pollnau 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 Markus Pollnau. Markus Pollnau is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Yang, Jing, M.B.J. Diemeer, Dimitri Geskus, et al.. (2008). Neodymium-complex-doped, photo-defined polymer channel waveguide amplifiers. University of Twente Research Information. 123–126.
12.
Ay, Feridun, et al.. (2007). Focused ion beam nano-structuring of photonic Bragg gratings in $Al_2O_3$ waveguides. Data Archiving and Networked Services (DANS). 247–250.1 indexed citations
Pollnau, Markus, et al.. (1997). 450mW of blue (473nm) power via second harmonic generation in periodically-poled lithium niobate. ePrints Soton (University of Southampton).1 indexed citations
19.
Hardman, P.J., Markus Pollnau, W.A. Clarkson, & D.C. Hanna. (1997). Thermal lensing in high-power end-pumped Nd:YLF lasers. ePrints Soton (University of Southampton).1 indexed citations
20.
Pollnau, Markus, W. Lüthy, H.P. Weber, et al.. (1996). Excited-state dynamics in the low-phonon materials Er3+:BaY2F8 and Cs3Er2Br9. University of Twente Research Information.1 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.