Caspar Hopfmann

582 total citations
26 papers, 412 citations indexed

About

Caspar Hopfmann is a scholar working on Atomic and Molecular Physics, and Optics, Artificial Intelligence and Electrical and Electronic Engineering. According to data from OpenAlex, Caspar Hopfmann has authored 26 papers receiving a total of 412 indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Atomic and Molecular Physics, and Optics, 17 papers in Artificial Intelligence and 13 papers in Electrical and Electronic Engineering. Recurrent topics in Caspar Hopfmann's work include Semiconductor Quantum Structures and Devices (20 papers), Photonic and Optical Devices (11 papers) and Quantum Information and Cryptography (11 papers). Caspar Hopfmann is often cited by papers focused on Semiconductor Quantum Structures and Devices (20 papers), Photonic and Optical Devices (11 papers) and Quantum Information and Cryptography (11 papers). Caspar Hopfmann collaborates with scholars based in Germany, United Kingdom and Israel. Caspar Hopfmann's co-authors include Stephan Reitzenstein, Sven Höfling, M. Kamp, Christian Schneider, A. Forchel, F. Albert, Jan Wiersig, Ido Kanter, H. A. M. Leymann and Nand Lal Sharma and has published in prestigious journals such as Advanced Materials, Nature Communications and SHILAP Revista de lepidopterología.

In The Last Decade

Caspar Hopfmann

24 papers receiving 386 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Caspar Hopfmann Germany 13 351 218 196 45 34 26 412
F. Albert Germany 12 344 1.0× 278 1.3× 146 0.7× 49 1.1× 15 0.4× 14 415
Julia Kabuß Germany 11 323 0.9× 135 0.6× 172 0.9× 25 0.6× 25 0.7× 22 368
A. Foerster Germany 9 253 0.7× 117 0.5× 148 0.8× 42 0.9× 20 0.6× 14 316
Wenchao Ge United States 11 475 1.4× 129 0.6× 340 1.7× 22 0.5× 18 0.5× 25 523
H. A. M. Leymann Germany 10 308 0.9× 122 0.6× 175 0.9× 45 1.0× 21 0.6× 16 350
Marc-Antoine Lemonde Canada 7 498 1.4× 238 1.1× 228 1.2× 27 0.6× 57 1.7× 13 527
Xiangying Hao China 15 709 2.0× 173 0.8× 291 1.5× 73 1.6× 31 0.9× 47 729
Armand Rundquist United States 11 571 1.6× 259 1.2× 330 1.7× 57 1.3× 19 0.6× 15 601
Andrew M. C. Dawes United States 10 680 1.9× 317 1.5× 132 0.7× 37 0.8× 13 0.4× 32 728
Victor Fiore United States 8 790 2.3× 596 2.7× 190 1.0× 30 0.7× 25 0.7× 10 811

Countries citing papers authored by Caspar Hopfmann

Since Specialization
Citations

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

Fields of papers citing papers by Caspar Hopfmann

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Caspar Hopfmann

This figure shows the co-authorship network connecting the top 25 collaborators of Caspar Hopfmann. A scholar is included among the top collaborators of Caspar Hopfmann 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 Caspar Hopfmann. Caspar Hopfmann 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.
Langer, M., A. M. Rahimi, Andrey Danilov, et al.. (2025). An ultra-compact deterministic source of maximally entangled photon pairs. APL Photonics. 10(6).
2.
Langer, Moritz, Abdolreza Rahimi, Riccardo Bassoli, et al.. (2025). Bright quantum dot light sources using monolithic microlenses on gold back-reflectors. Nanotechnology. 36(22). 225301–225301. 1 indexed citations
3.
Bauer, Tobias, Nand Lal Sharma, Cornelius Nawrath, et al.. (2024). High-fidelity distribution of triggered polarization-entangled telecom photons via a 36 km intra-city fiber network. 2(4). 274–274. 4 indexed citations
4.
5.
Keil, Robert, Nand Lal Sharma, Weijie Nie, et al.. (2022). Photoneutralization of charges in GaAs quantum dot based entangled photon emitters. Physical review. B.. 105(11). 2 indexed citations
6.
Zopf, Michael, Nand Lal Sharma, Weijie Nie, et al.. (2022). Statistical limits for entanglement swapping with semiconductor entangled photon sources. Physical review. B.. 105(23). 2 indexed citations
7.
Sharma, Nand Lal, et al.. (2021). Experimental optimization of the fiber coupling efficiency of GaAs quantum dot-based photon sources. Applied Physics Letters. 119(24). 4 indexed citations
8.
Hopfmann, Caspar, Nand Lal Sharma, Weijie Nie, et al.. (2021). Heralded preparation of spin qubits in droplet-etched GaAs quantum dots using quasiresonant excitation. Physical review. B.. 104(7). 10 indexed citations
9.
Hopfmann, Caspar, et al.. (2017). 量子ドット-微小共振器システムにおけるJaynes-CummingsからAutler-Townesラダーへの転移. Physical Review B. 95(3). 1–35302. 7 indexed citations
10.
Leymann, H. A. M., Caspar Hopfmann, C. Schneider, et al.. (2017). Pump-Power-Driven Mode Switching in a Microcavity Device and Its Relation to Bose-Einstein Condensation. Physical Review X. 7(2). 16 indexed citations
11.
Hopfmann, Caspar, Alexander Carmele, Anna Musiał, et al.. (2017). Transition from Jaynes-Cummings to Autler-Townes ladder in a quantum dot–microcavity system. Physical review. B.. 95(3). 13 indexed citations
12.
Schlehahn, Alexander, Rainer Schmidt, Caspar Hopfmann, et al.. (2016). Generating single photons at gigahertz modulation-speed using electrically controlled quantum dot microlenses. Applied Physics Letters. 108(2). 22 indexed citations
13.
Hopfmann, Caspar, Anna Musiał, Sebastian Maier, et al.. (2016). Efficient stray-light suppression for resonance fluorescence in quantum dot micropillars using self-aligned metal apertures. Semiconductor Science and Technology. 31(9). 95007–95007. 1 indexed citations
14.
Schnauber, Peter, Alexander Thoma, Alexander Schlehahn, et al.. (2015). Bright Single-Photon Sources Based on Anti-Reflection Coated Deterministic Quantum Dot Microlenses. SHILAP Revista de lepidopterología. 4(1). 1–1. 7 indexed citations
15.
Leymann, H. A. M., Caspar Hopfmann, F. Albert, et al.. (2013). Intensity fluctuations in bimodal micropillar lasers enhanced by quantum-dot gain competition. Physical Review A. 87(5). 43 indexed citations
16.
Hopfmann, Caspar, F. Albert, Christian Schneider, et al.. (2013). Nonlinear emission characteristics of quantum dot–micropillar lasers in the presence of polarized optical feedback. New Journal of Physics. 15(2). 25030–25030. 13 indexed citations
17.
Stock, E., F. Albert, Caspar Hopfmann, et al.. (2012). On‐Chip Quantum Optics with Quantum Dot Microcavities. Advanced Materials. 25(5). 707–710. 49 indexed citations
18.
Albert, F., Caspar Hopfmann, Fabian Arnold, et al.. (2012). Directional whispering gallery mode emission from Limaçon-shaped electrically pumped quantum dot micropillar lasers. Applied Physics Letters. 101(2). 48 indexed citations
19.
Albert, F., Caspar Hopfmann, Stephan Reitzenstein, et al.. (2011). Observing chaos for quantum-dot microlasers with external feedback. Nature Communications. 2(1). 366–366. 64 indexed citations
20.
Reitzenstein, Stephan, Tobias Heindel, C. Kistner, et al.. (2011). Electrically Driven Quantum Dot Micropillar Light Sources. IEEE Journal of Selected Topics in Quantum Electronics. 17(6). 1670–1680. 15 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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