R. A. Höpfel

1.4k total citations
47 papers, 963 citations indexed

About

R. A. Höpfel is a scholar working on Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering and Spectroscopy. According to data from OpenAlex, R. A. Höpfel has authored 47 papers receiving a total of 963 indexed citations (citations by other indexed papers that have themselves been cited), including 43 papers in Atomic and Molecular Physics, and Optics, 28 papers in Electrical and Electronic Engineering and 9 papers in Spectroscopy. Recurrent topics in R. A. Höpfel's work include Semiconductor Quantum Structures and Devices (30 papers), Quantum and electron transport phenomena (12 papers) and Spectroscopy and Laser Applications (9 papers). R. A. Höpfel is often cited by papers focused on Semiconductor Quantum Structures and Devices (30 papers), Quantum and electron transport phenomena (12 papers) and Spectroscopy and Laser Applications (9 papers). R. A. Höpfel collaborates with scholars based in Austria, United States and Germany. R. A. Höpfel's co-authors include Jagdeep Shah, A. C. Gossard, E. Gornik, Markus K. Oberthaler, P. A. Wolff, Nobuhiko Sawaki, N. E. Hecker, T. Maier, G. Strasser and G. Weimann and has published in prestigious journals such as Physical Review Letters, Physical review. B, Condensed matter and Applied Physics Letters.

In The Last Decade

R. A. Höpfel

46 papers receiving 921 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
R. A. Höpfel Austria 16 721 562 190 157 122 47 963
V. A. Kochelap Ukraine 17 636 0.9× 581 1.0× 181 1.0× 119 0.8× 274 2.2× 117 932
K. Ploog Germany 21 1.2k 1.6× 700 1.2× 93 0.5× 277 1.8× 346 2.8× 69 1.4k
M. Betz Germany 20 861 1.2× 522 0.9× 277 1.5× 181 1.2× 78 0.6× 86 1.2k
R. Hey Germany 18 1.0k 1.4× 577 1.0× 144 0.8× 263 1.7× 193 1.6× 94 1.3k
A. A. Grinberg United States 13 636 0.9× 619 1.1× 79 0.4× 187 1.2× 107 0.9× 46 937
A. Kastalsky United States 20 1.2k 1.7× 1.0k 1.8× 99 0.5× 188 1.2× 375 3.1× 59 1.5k
F. K. Reinhart Switzerland 15 751 1.0× 682 1.2× 133 0.7× 173 1.1× 109 0.9× 60 973
Akiyoshi Watanabe Japan 12 624 0.9× 562 1.0× 152 0.8× 124 0.8× 92 0.8× 46 839
Franko Küppers Germany 19 392 0.5× 837 1.5× 159 0.8× 71 0.5× 79 0.6× 127 1.0k
S. L. Chuang United States 22 1.4k 2.0× 999 1.8× 129 0.7× 191 1.2× 234 1.9× 56 1.6k

Countries citing papers authored by R. A. Höpfel

Since Specialization
Citations

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

Fields of papers citing papers by R. A. Höpfel

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of R. A. Höpfel

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

All Works

20 of 20 papers shown
1.
Hecker, N. E., R. A. Höpfel, Nobuhiko Sawaki, & Thomas Maier. (2002). Large luminescence enhancements from a quantum well located near gold gratings. 213–214.
2.
Hecker, N. E., R. A. Höpfel, Nobuhiko Sawaki, T. Maier, & G. Strasser. (1999). Surface plasmon-enhanced photoluminescence from a single quantum well. Applied Physics Letters. 75(11). 1577–1579. 94 indexed citations
3.
Höpfel, R. A., et al.. (1996). Ultrafast reflectivity changes in photoexcited GaAs Schottky diodes. Applied Physics Letters. 68(20). 2778–2780. 13 indexed citations
4.
Hecker, N. E., et al.. (1995). Ultrafast energy loss of electrons in p-GaAs. Applied Physics Letters. 67(2). 264–266. 9 indexed citations
5.
Rodrigues, Rosana, et al.. (1994). Spectral luminescence enhancement in three-dimensional optical microcavities formed by GaAs microcrystals. Solid-State Electronics. 37(4-6). 1163–1166. 3 indexed citations
6.
Rodrigues, Rosana, et al.. (1994). Electron-hole scattering in highly doped p-GaAs after femtosecond optical excitation. Semiconductor Science and Technology. 9(5S). 456–458. 3 indexed citations
7.
Höpfel, R. A., et al.. (1994). Intersubband relaxation of hot excitons in GaAs quantum wells. Semiconductor Science and Technology. 9(5S). 733–735. 2 indexed citations
8.
Höpfel, R. A., Rosana Rodrigues, Y. Iimura, et al.. (1993). Intersubband relaxation of heavy-hole excitons in GaAs quantum wells. Physical review. B, Condensed matter. 47(16). 10943–10946. 8 indexed citations
9.
Sawaki, Nobuhiko, R. A. Höpfel, E. Gornik, & H. Kano. (1989). Tunneling and energy relaxation of hot electrons in double quantum well structures. Solid-State Electronics. 32(12). 1321–1325. 3 indexed citations
10.
Höpfel, R. A., et al.. (1989). Femtosecond studies of real-space transfer in AlGaAs/GaAs heterostructures. Superlattices and Microstructures. 5(2). 193–196. 8 indexed citations
11.
Höpfel, R. A., et al.. (1989). Negative photoconductivity in modulation-doped quantum wells. Superlattices and Microstructures. 5(1). 15–18. 3 indexed citations
12.
Höpfel, R. A. & Jagdeep Shah. (1988). Electron-hole drag in semiconductors. Solid-State Electronics. 31(3-4). 643–648. 7 indexed citations
13.
Höpfel, R. A.. (1988). Extremely high negative photoconductivity in p-modulation-doped GaAs quantum wells. Applied Physics Letters. 52(10). 801–803. 20 indexed citations
14.
Höpfel, R. A., Jagdeep Shah, P. A. Wolff, & A. C. Gossard. (1988). Electron-hole scattering in GaAs quantum wells. Physical review. B, Condensed matter. 37(12). 6941–6954. 52 indexed citations
15.
Höpfel, R. A., Jagdeep Shah, T. Y. Chang, & N. J. Sauer. (1987). Single heterostructures for optical transport experiments. Applied Physics Letters. 51(22). 1815–1817. 5 indexed citations
16.
Höpfel, R. A., Jagdeep Shah, P. A. Wolff, & A. C. Gossard. (1986). Negative absolute mobility of holes in n-doped GaAs quantum wells. Applied Physics Letters. 49(10). 572–574. 25 indexed citations
17.
Höpfel, R. A., Jagdeep Shah, & A. C. Gossard. (1986). Nonequilibrium electron-hole plasma in GaAs quantum wells. Physical Review Letters. 56(7). 765–768. 59 indexed citations
18.
Höpfel, R. A., Jagdeep Shah, P. A. Wolff, & A. C. Gossard. (1986). Negative Absolute Mobility of Minority Electrons in GaAs Quantum Wells. Physical Review Letters. 56(25). 2736–2739. 104 indexed citations
19.
Höpfel, R. A., E. Gornik, A. C. Gossard, & W. Wiegmann. (1983). Plasmon excitation by coulomb scattering of electrons in 2D systems. Physica B+C. 117-118. 646–648. 1 indexed citations
20.
Höpfel, R. A., G. Lindemann, E. Gornik, et al.. (1982). Cyclotron and plasmon emission from two-dimensional electrons in GaAs. Surface Science. 113(1-3). 118–123. 47 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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