Hassan A. Hafez

2.0k total citations · 1 hit paper
39 papers, 1.4k citations indexed

About

Hassan A. Hafez is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Biomedical Engineering. According to data from OpenAlex, Hassan A. Hafez has authored 39 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 26 papers in Electrical and Electronic Engineering, 24 papers in Atomic and Molecular Physics, and Optics and 17 papers in Biomedical Engineering. Recurrent topics in Hassan A. Hafez's work include Terahertz technology and applications (18 papers), Plasmonic and Surface Plasmon Research (15 papers) and Graphene research and applications (9 papers). Hassan A. Hafez is often cited by papers focused on Terahertz technology and applications (18 papers), Plasmonic and Surface Plasmon Research (15 papers) and Graphene research and applications (9 papers). Hassan A. Hafez collaborates with scholars based in Germany, Canada and United States. Hassan A. Hafez's co-authors include T. Ozaki, Dmitry Turchinovich, X. Ropagnol, Michael Gensch, Klaas‐Jan Tielrooij, Sergey Kovalev, X. Chai, Mischa Bonn, S. Mondal and A. Ibrahim and has published in prestigious journals such as Nature, Nature Communications and SHILAP Revista de lepidopterología.

In The Last Decade

Hassan A. Hafez

35 papers receiving 1.4k citations

Hit 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.

Extremely efficient terahertz high-harmonic generation in graphene by hot Dirac fermions

2018 377 citations Hassan A. Hafez, Sergey Kovalev et al. Nature profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Hassan A. Hafez Germany	17	982	837	410	325	262	39	1.4k
Sergey Kovalev Germany	18	860 0.9×	908 1.1×	307 0.7×	210 0.6×	279 1.1×	74	1.4k
Martin Mittendorff Germany	22	959 1.0×	830 1.0×	447 1.1×	585 1.8×	216 0.8×	61	1.6k
Andrei Gorodetsky United Kingdom	19	974 1.0×	543 0.6×	237 0.6×	209 0.6×	159 0.6×	67	1.2k
T. Taniuchi Japan	17	716 0.7×	474 0.6×	143 0.3×	152 0.5×	127 0.5×	95	1.1k
Yi Hua Germany	17	593 0.6×	687 0.8×	447 1.1×	94 0.3×	348 1.3×	42	1.1k
Ingrid Wilke United States	17	736 0.7×	481 0.6×	195 0.5×	100 0.3×	88 0.3×	66	977
V. V. Kubarev Russia	16	857 0.9×	640 0.8×	186 0.5×	78 0.2×	141 0.5×	111	1.1k
Sharly Fleischer Israel	17	594 0.6×	1.1k 1.3×	172 0.4×	96 0.3×	103 0.4×	37	1.4k
E. C. Piquette United States	19	1.1k 1.1×	628 0.8×	181 0.4×	274 0.8×	193 0.7×	55	1.4k
Igor Ilyakov Russia	18	624 0.6×	568 0.7×	175 0.4×	90 0.3×	152 0.6×	60	918

Countries citing papers authored by Hassan A. Hafez

Since Specialization

Citations

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

Fields of papers citing papers by Hassan A. Hafez

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hassan A. Hafez. 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 Hassan A. Hafez. The network helps show where Hassan A. Hafez may publish in the future.

Co-authorship network of co-authors of Hassan A. Hafez

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

Hafez, Hassan A., et al.. (2025). Enhanced THz emission from spintronic emitters with Pt-Al alloys. Applied Physics Letters. 127(15).

Hafez, Hassan A., et al.. (2025). Emergent spin Hall conductivity in tantalum-rhenium alloys. Physical review. B.. 111(17).

Hafez, Hassan A., et al.. (2025). Terahertz field effect in a two-dimensional semiconductor. Nature Communications. 16(1). 5235–5235. 1 indexed citations

Hafez, Hassan A., et al.. (2024). Electronic transparency of internal interfaces in metallic nanostructures comprising light, heavy and ferromagnetic metals measured by terahertz spectroscopy. Nanophotonics. 13(10). 1883–1890. 1 indexed citations

Zhang, Wentao, et al.. (2024). Terahertz time-domain spectroscopy for simultaneous measurement of optical constants, and material thickness with deep-subwavelength precision. Optics Express. 33(4). 8650–8650.

Zhang, Wentao, et al.. (2023). Efficient terahertz optical filtering with large-area all-metal and polymer-metal woven wire meshes. Optics Express. 31(12). 19076–19076. 2 indexed citations

Kovalev, Sergey, Hassan A. Hafez, Klaas‐Jan Tielrooij, et al.. (2021). Electrical tunability of terahertz nonlinearity in graphene. Science Advances. 7(15). 73 indexed citations

Walsh, Ryan, Mohamed Cherif, Hassan A. Hafez, et al.. (2021). High-sensitivity small-molecule detection of microcystin-LR cyano-toxin using a terahertz-aptamer biosensor. The Analyst. 146(24). 7583–7592. 8 indexed citations

Kovalev, Sergey, Klaas‐Jan Tielrooij, Jan‐Christoph Deinert, et al.. (2021). Terahertz signatures of ultrafast Dirac fermion relaxation at the surface of topological insulators. npj Quantum Materials. 6(1). 32 indexed citations

10.

Chin, Matthew L., Stephan Winnerl, Hassan A. Hafez, et al.. (2021). Plasmonic Terahertz Nonlinearity in Graphene Disks. SHILAP Revista de lepidopterología. 3(2). 10 indexed citations

11.

Deinert, Jan‐Christoph, David Alcaraz Iranzo, R. Pérez, et al.. (2020). Grating-Graphene Metamaterial as a Platform for Terahertz Nonlinear Photonics. ACS Nano. 15(1). 1145–1154. 81 indexed citations

12.

Titova, Lyubov V., Varun Natu, Shuohan Huang, et al.. (2020). 2D MXenes: Terahertz Properties and Applications. 1–2. 2 indexed citations

13.

Hafez, Hassan A., Sergey Kovalev, Jan‐Christoph Deinert, et al.. (2018). Extremely efficient terahertz high-harmonic generation in graphene by hot Dirac fermions. Nature. 561(7724). 507–511. 377 indexed citations breakdown →

14.

Mondal, S., Qiliang Wei, W. J. Ding, et al.. (2017). Aligned copper nanorod arrays for highly efficient generation of intense ultra-broadband THz pulses. Scientific Reports. 7(1). 40058–40058. 31 indexed citations

15.

Mondal, S., Hassan A. Hafez, X. Ropagnol, & T. Ozaki. (2017). MV/cm terahertz pulses from relativistic laser-plasma interaction characterized by nonlinear terahertz absorption bleaching in n-doped InGaAs. Optics Express. 25(15). 17511–17511. 7 indexed citations

16.

Liao, Guoqian, Yutong Li, Chengyu Li, et al.. (2016). Terahertz emission from two-plasmon-decay induced transient currents in laser-solid interactions. Physics of Plasmas. 23(1). 19 indexed citations

17.

Hafez, Hassan A., Pierre L. Lévesque, Ibraheem Al‐Naib, et al.. (2015). Intense terahertz field effects on photoexcited carrier dynamics in gated graphene. Applied Physics Letters. 107(25). 19 indexed citations

18.

Hafez, Hassan A., Pierre L. Lévesque, Ibraheem Al‐Naib, et al.. (2015). Intense Terahertz Field-induced Carrier Dynamics in Gated Monolayer Graphene. 306. STu2H.4–STu2H.4. 1 indexed citations

19.

Al‐Naib, Ibraheem, Gargi Sharma, Marc M. Dignam, et al.. (2013). Effect of local field enhancement on the nonlinear terahertz response of a silicon-based metamaterial. Physical Review B. 88(19). 44 indexed citations

20.

Sharma, Gargi, Ibraheem Al‐Naib, Hassan A. Hafez, et al.. (2012). Carrier density dependence of the nonlinear absorption of intense THz radiation in GaAs. Optics Express. 20(16). 18016–18016. 51 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.

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