World's Best Scientists 2026 revealed!

D-Index & Metrics

Engineering and Technology

D-Index
42
Citations
6666
World Ranking
6597
National Ranking
220

Hans Zappe publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where Hans Zappe sits on this spectrum.

38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 134 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 117 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 59 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38 publications 804+

This scientist: 433 publications — 91st percentile

91% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

Hans Zappe D-index placement in Engineering and Technology in 2026

The chart shows the D-index (discipline H-index) distribution of Engineering and Technology scientists ranked by Research.com in 2026. The highlighted bar marks where Hans Zappe sits on this spectrum.

30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 128 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 349 scientists 41 D-Index: 362 scientists 42 D-Index: 425 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 94 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 24 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 42 D-Index — 35th percentile

35% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

Research.com Recognitions

  • 2021 - OSA Fellows Hans Zappe University of Freiburg, Germany For fundamental contributions to the development and application of tunable, liquid and soft-matter micro-optics
  • 2018 - SPIE Fellow

Overview

Hans Zappe is affiliated with the University of Freiburg in Germany and has contributed extensively to the field of engineering, with a particular focus on biomedical engineering, electrical and electronic engineering, atomic and molecular physics, optics, mechanical engineering, and biophysics.

Their research spans a variety of main topics including:

  • Optical Coherence Tomography Applications
  • Electrowetting and Microfluidic Technologies
  • Photonic and Optical Devices
  • Advanced Fluorescence Microscopy Techniques
  • Liquid Crystal Research Advancements
  • Adaptive optics and wavefront sensing
  • Advanced optical system design

Some recent publications by Hans Zappe include:

  • High-throughput injection molding of transparent fused silica glass, 2021, Science
  • Accelerated electrowetting-based tunable fluidic lenses, 2021, Optics Express
  • Low-Power Organic Light Sensor Array Based on Active-Matrix Common-Gate Transimpedance Amplifier on Foil for Imaging Applications, 2020, IEEE Journal of Solid-State Circuits
  • In situ sensors for flow reactors - a review, 2021, Reaction Chemistry & Engineering
  • Tunable fluidic lens with a dynamic high-order aberration control, 2021, Applied Optics

Frequent co-authors who have collaborated on multiple publications with Hans Zappe include:

  • Narendra Ahuja
  • Frede Blaabjerg
  • Dushan Boroyevich
  • Hsiao-Dong Chiang
  • Kukjin Chun

The venues where Hans Zappe has frequently published are:

  • IEEJ Transactions on Electrical and Electronic Engineering
  • Journal of Optical Microsystems
  • Optics Express
  • Applied Optics
  • Journal of Micromechanics and Microengineering

Hans Zappe has been recognized within the scientific community through awards including the OSA Fellowship in 2021, credited for contributions to tunable, liquid, and soft-matter micro-optics. Earlier, in 2018, they were named an SPIE Fellow.

Best Publications

  • Iris‐Like Tunable Aperture Employing Liquid‐Crystal Elastomers

    Stefan Schuhladen;Falko Preller;Richard Rix;Sebastian Petsch

  • Optical MEMS: From Micromirrors to Complex Systems

    Olav Solgaard;Asif A. Godil;Roger T. Howe;Luke P. Lee

  • Tunable microfluidic microlenses

    Armin Werber;Hans Zappe

  • Fundamentals of Micro-Optics

    Hans P. Zappe

  • A MEMS-based variable micro-lens system

    F Krogmann;W Mönch;H Zappe

  • Cascaded second-order optical nonlinearities in on-chip micro rings.

    Richard Wolf;Ingo Breunig;Hans Zappe;Karsten Buse

  • A transient analysis of latchup in bulk CMOS

    R.R. Troutman;H.P. Zappe

  • Smart artificial muscle actuators: Liquid crystal elastomers with integrated temperature feedback

    S. Petsch;R. Rix;B. Khatri;S. Schuhladen

  • Effect of lens size on the focusing performance of plasmonic lenses and suggestions for the design

    Yiting Yu;Hans Zappe

  • High-throughput injection molding of transparent fused silica glass

    Markus Mader;Oliver Schlatter;Barbara Heck;Andreas Warmbold

  • Elastomeric lenses with tunable astigmatism

    Peter Liebetraut;Sebastian Petsch;Jens Liebeskind;Hans Zappe

  • Design of spherically corrected, achromatic variable-focus liquid lenses.

    Stephan Reichelt;Hans Zappe

  • Quasi-phase-matched nonlinear optical frequency conversion in on-chip whispering galleries

    Richard Wolf;Yuechen Jia;Sebastian Bonaus;Christoph S. Werner

  • An all-dielectric tunable optical filter based on the thermo-optic effect

    Dennis Hohlfeld;Hans Zappe

  • Fabrication and testing of micro-lens arrays by all-liquid techniques

    Wolfgang Moench;Hans Zappe

  • Wafer-scale fabricated thermo-pneumatically tunable microlenses

    Wei Zhang;Hans Zappe;Andreas Seifert

  • Micro-machined tunable optical filters with optimized band-pass spectrum

    D. Hohlfeld;H. Zappe

  • Combined Twyman–Green and Mach–Zehnder interferometer for microlens testing

    Stephan Reichelt;Hans Zappe

  • Tunable Pneumatic Microoptics

    A. Werber;H. Zappe

  • Completely integrated, thermo-pneumatically tunable microlens

    Wei Zhang;Khaled Aljasem;Hans Zappe;Andreas Seifert

  • Narrow-linewidth vertical-cavity surface-emitting lasers for oxygen detection

    Hans P. Zappe;Martin Hess;Michael Moser;Rainer Hövel

Frequent Co-Authors

Friedhelm Beyersdorf
Friedhelm Beyersdorf University of Freiburg
Daniel Hofstetter
Daniel Hofstetter University of Neuchâtel
Chenming Hu
Chenming Hu University of California, Berkeley
Hugo Thienpont
Hugo Thienpont Vrije Universiteit Brussel
Yiannos Manoli
Yiannos Manoli University of Freiburg
Rudolf Zentel
Rudolf Zentel Johannes Gutenberg University of Mainz
Jan Christoph Goldschmidt
Jan Christoph Goldschmidt Fraunhofer Institute for Solar Energy Systems
Peter Woias
Peter Woias University of Freiburg
Ute Zschieschang
Ute Zschieschang Max Planck Institute for Solid State Research
Hagen Klauk
Hagen Klauk Max Planck Institute for Solid State Research

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