World's Best Scientists 2026 revealed!
Karl Unterrainer

Karl Unterrainer

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Electronics and Electrical Engineering
Austria
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Electronics and Electrical Engineering 45 3557 3413 8 8 452 8094

Karl Unterrainer publications per year

The chart shows the history of publications by Karl Unterrainer between 1987 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Karl Unterrainer published across 39 years, from 1987 to 2025, averaging 12.7 papers a year. Output peaked at 42 publications in 2007. 10 of the 496 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1987 to 2025. Vertical axis: number of publications, 0 to 42. Peak 42 publications in 2007. 1987: 1 publication 1988: 3 publications 1989: 3 publications 1990: 4 publications 1991: 2 publications 1992: 4 publications 1993: 4 publications 1994: 4 publications 1995: 6 publications 1996: 8 publications 1997: 9 publications 1998: 18 publications 1999: 16 publications 2000: 21 publications 2001: 11 publications 2002: 22 publications 2003: 11 publications 2004: 22 publications 2005: 15 publications 2006: 11 publications 2007: 42 publications 2008: 24 publications 2009: 27 publications 2010: 26 publications 2011: 21 publications 2012: 21 publications 2013: 22 publications 2014: 7 publications 2015: 11 publications 2016: 15 publications 2017: 11 publications 2018: 9 publications 2019: 20 publications 2020: 8 publications 2021: 12 publications 2022: 7 publications 2023: 8 publications 2024: 7 publications 2025: 3 publications
1987 2025

496 publications in total across all disciplines

View publications per year as a table
Karl Unterrainer: publications per year, 1987 to 2025
Year Publications
1987 1
1988 3
1989 3
1990 4
1991 2
1992 4
1993 4
1994 4
1995 6
1996 8
1997 9
1998 18
1999 16
2000 21
2001 11
2002 22
2003 11
2004 22
2005 15
2006 11
2007 42
2008 24
2009 27
2010 26
2011 21
2012 21
2013 22
2014 7
2015 11
2016 15
2017 11
2018 9
2019 20
2020 8
2021 12
2022 7
2023 8
2024 7
2025 3
Total 496
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Karl Unterrainer publication distribution in Electronics and Electrical Engineering in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Electronics and Electrical Engineering in 2026. The highlighted bar marks where Karl Unterrainer sits on this spectrum.

No. of scientists
100 200 300 400
Bar chart with 53 bars. Horizontal axis: publications, 34–53 to 1,065+. Vertical axis: number of scientists, 0 to 445. Most scientists, 445, have 174–193 publications. The last bar groups every scientist with 1,065 publications or more. The highlighted bar, 434–453 publications, is where this scientist sits. 34–53 publications: 24 scientists 54–73 publications: 52 scientists 74–93 publications: 114 scientists 94–113 publications: 203 scientists 114–133 publications: 269 scientists 134–153 publications: 355 scientists 154–173 publications: 403 scientists 174–193 publications: 445 scientists 194–213 publications: 430 scientists 214–233 publications: 431 scientists 234–253 publications: 399 scientists 254–273 publications: 366 scientists 274–293 publications: 335 scientists 294–313 publications: 300 scientists 314–333 publications: 276 scientists 334–353 publications: 250 scientists 354–373 publications: 214 scientists 374–393 publications: 187 scientists 394–413 publications: 152 scientists 414–433 publications: 169 scientists 434–453 publications: 147 scientists 454–473 publications: 111 scientists 474–493 publications: 117 scientists 494–513 publications: 103 scientists 514–533 publications: 99 scientists 534–553 publications: 92 scientists 554–573 publications: 75 scientists 574–593 publications: 58 scientists 594–613 publications: 69 scientists 614–633 publications: 50 scientists 634–653 publications: 62 scientists 654–673 publications: 54 scientists 674–693 publications: 44 scientists 694–713 publications: 37 scientists 714–733 publications: 28 scientists 734–753 publications: 26 scientists 754–773 publications: 26 scientists 774–793 publications: 19 scientists 794–813 publications: 23 scientists 814–833 publications: 20 scientists 834–853 publications: 16 scientists 854–873 publications: 20 scientists 874–893 publications: 11 scientists 894–913 publications: 11 scientists 914–933 publications: 16 scientists 934–953 publications: 13 scientists 954–973 publications: 10 scientists 974–993 publications: 11 scientists 994–1,013 publications: 9 scientists 1,014–1,033 publications: 9 scientists 1,034–1,053 publications: 10 scientists 1,054–1,064 publications: 6 scientists 1,065+ publications: 99 scientists
34–53 publications 1,065+

This scientist: 452 publications — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,065 publications or more.

View publications distribution as a table
Number of Electronics and Electrical Engineering scientists by publication count, Research.com 2026 ranking edition. Based on 6,875 ranked scientists.
Publications Scientists This scientist
34–53 24
54–73 52
74–93 114
94–113 203
114–133 269
134–153 355
154–173 403
174–193 445
194–213 430
214–233 431
234–253 399
254–273 366
274–293 335
294–313 300
314–333 276
334–353 250
354–373 214
374–393 187
394–413 152
414–433 169
434–453 147 452
454–473 111
474–493 117
494–513 103
514–533 99
534–553 92
554–573 75
574–593 58
594–613 69
614–633 50
634–653 62
654–673 54
674–693 44
694–713 37
714–733 28
734–753 26
754–773 26
774–793 19
794–813 23
814–833 20
834–853 16
854–873 20
874–893 11
894–913 11
914–933 16
934–953 13
954–973 10
974–993 11
994–1,013 9
1,014–1,033 9
1,034–1,053 10
1,054–1,064 6
1,065+ 99
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Karl Unterrainer D-index placement in Electronics and Electrical Engineering in 2026

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

No. of scientists
50 100 150 200 250
Bar chart with 82 bars. Horizontal axis: D-Index, 30 to 111+. Vertical axis: number of scientists, 0 to 263. Most scientists, 263, have 32 D-Index. The last bar groups every scientist with 111 D-Index or more. The highlighted bar, 45 D-Index, is where this scientist sits. 30 D-Index: 178 scientists 31 D-Index: 257 scientists 32 D-Index: 263 scientists 33 D-Index: 262 scientists 34 D-Index: 244 scientists 35 D-Index: 236 scientists 36 D-Index: 211 scientists 37 D-Index: 220 scientists 38 D-Index: 214 scientists 39 D-Index: 214 scientists 40 D-Index: 205 scientists 41 D-Index: 187 scientists 42 D-Index: 194 scientists 43 D-Index: 201 scientists 44 D-Index: 155 scientists 45 D-Index: 189 scientists 46 D-Index: 148 scientists 47 D-Index: 160 scientists 48 D-Index: 134 scientists 49 D-Index: 130 scientists 50 D-Index: 141 scientists 51 D-Index: 156 scientists 52 D-Index: 108 scientists 53 D-Index: 130 scientists 54 D-Index: 112 scientists 55 D-Index: 97 scientists 56 D-Index: 111 scientists 57 D-Index: 102 scientists 58 D-Index: 108 scientists 59 D-Index: 120 scientists 60 D-Index: 103 scientists 61 D-Index: 93 scientists 62 D-Index: 92 scientists 63 D-Index: 74 scientists 64 D-Index: 77 scientists 65 D-Index: 73 scientists 66 D-Index: 64 scientists 67 D-Index: 69 scientists 68 D-Index: 60 scientists 69 D-Index: 39 scientists 70 D-Index: 57 scientists 71 D-Index: 59 scientists 72 D-Index: 46 scientists 73 D-Index: 49 scientists 74 D-Index: 38 scientists 75 D-Index: 35 scientists 76 D-Index: 32 scientists 77 D-Index: 35 scientists 78 D-Index: 31 scientists 79 D-Index: 22 scientists 80 D-Index: 34 scientists 81 D-Index: 31 scientists 82 D-Index: 34 scientists 83 D-Index: 23 scientists 84 D-Index: 18 scientists 85 D-Index: 30 scientists 86 D-Index: 19 scientists 87 D-Index: 19 scientists 88 D-Index: 20 scientists 89 D-Index: 8 scientists 90 D-Index: 17 scientists 91 D-Index: 7 scientists 92 D-Index: 14 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 12 scientists 97 D-Index: 10 scientists 98 D-Index: 10 scientists 99 D-Index: 12 scientists 100 D-Index: 16 scientists 101 D-Index: 5 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 8 scientists 105 D-Index: 9 scientists 106 D-Index: 13 scientists 107 D-Index: 4 scientists 108 D-Index: 5 scientists 109 D-Index: 10 scientists 110 D-Index: 8 scientists 111+ D-Index: 96 scientists
30 D-Index 111+

This scientist: 45 D-Index — 50th percentile

50% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 111 D-Index or more.

View D-Index distribution as a table
Number of Electronics and Electrical Engineering scientists by D-index, Research.com 2026 ranking edition. Based on 6,875 ranked scientists.
D-Index Scientists This scientist
30 178
31 257
32 263
33 262
34 244
35 236
36 211
37 220
38 214
39 214
40 205
41 187
42 194
43 201
44 155
45 189 45
46 148
47 160
48 134
49 130
50 141
51 156
52 108
53 130
54 112
55 97
56 111
57 102
58 108
59 120
60 103
61 93
62 92
63 74
64 77
65 73
66 64
67 69
68 60
69 39
70 57
71 59
72 46
73 49
74 38
75 35
76 32
77 35
78 31
79 22
80 34
81 31
82 34
83 23
84 18
85 30
86 19
87 19
88 20
89 8
90 17
91 7
92 14
93 9
94 15
95 10
96 12
97 10
98 10
99 12
100 16
101 5
102 7
103 7
104 8
105 9
106 13
107 4
108 5
109 10
110 8
111+ 96
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Research.com Recognitions

  • 2026 - Research.com Electronics and Electrical Engineering in Austria Leader Award

Overview

Karl Unterrainer is affiliated with TU Wien in Austria and has contributed extensively to several fields of scientific research, primarily focusing on engineering, chemistry, and physics and astronomy. Their work centers on various subfields, including electrical and electronic engineering, spectroscopy, atomic and molecular physics and optics, atmospheric science, and acoustics and ultrasonics.

The main topics of Karl Unterrainer's research cover spectroscopy and laser applications, photonic and optical devices, advanced fiber laser technologies, terahertz technology and applications, atmospheric ozone and climate, random lasers and scattering media, as well as atmospheric and environmental gas dynamics.

They have published scientific papers in a variety of venues, with frequent publications appearing in:

  • Conference on Lasers and Electro-Optics
  • Optics Express
  • 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)
  • Applied Physics Letters
  • Optica

Recent papers authored or coauthored by Karl Unterrainer include:

  • Comb operation in terahertz quantum cascade ring lasers, 2021, Optica
  • Landau level laser, 2021, Nature Photonics
  • Terahertz optical machine learning for object recognition, 2020, APL Photonics
  • Silicon integrated terahertz quantum cascade ring laser frequency comb, 2022, Applied Physics Letters
  • Ultrabroadband Heterogeneous THz Quantum Cascade Laser, 2022, ACS Photonics

Karl Unterrainer has collaborated frequently with a number of coauthors, including Benedikt Limbacher, G. Strasser, A. M. Andrews, J. Darmo, and Michael Jaidl. Their research relationships indicate consistent work alongside specialists in related scientific fields and disciplines.

Best Publications

  • Microcavity-Integrated Graphene Photodetector

    Marco Furchi;Alexander Urich;Andreas Pospischil;Govinda Lilley

  • Quantum cascade lasers: ultrahigh-speed operation, optical wireless communication, narrow linewidth, and far-infrared emission

    F. Capasso;R. Paiella;R. Martini;R. Colombelli

  • Intrinsic response time of graphene photodetectors.

    Alexander Urich;Karl Unterrainer;Thomas F Mueller

  • Few-Cycle THz Emission from Cold Plasma Oscillations

    R. Kersting;K. Unterrainer;G. Strasser;H. F. Kauffmann

  • Inverse Bloch oscillator: Strong terahertz-photocurrent resonances at the Bloch frequency.

    K. Unterrainer;B. J. Keay;M. C. Wanke;S. J. Allen

  • Imaging with a Terahertz quantum cascade laser.

    Juraj Darmo;Vincas Tamosiunas;Gernot Fasching;Josef Kröll

  • Terahertz emission from GaAs and InAs in a magnetic field

    James Heyman;P Neocleous;D Hebert;P.A. Crowell

  • Terahertz phase modulator

    R. Kersting;G. Strasser;K. Unterrainer

  • Quantum cascade lasers with double metal-semiconductor waveguide resonators

    Karl Unterrainer;Raffaele Colombelli;Claire F. Gmachl;Federico Capasso

  • Coherent plasmons in n-doped GaAs

    R. Kersting;J. N. Heyman;G. Strasser;K. Unterrainer

  • Ultrafast intraband spectroscopy of electron capture and relaxation in InAs/GaAs quantum dots

    T. Müller;F. F. Schrey;G. Strasser;K. Unterrainer

  • Temperature and Intensity Dependence of Intersubband Relaxation Rates from Photovoltage and Absorption.

    James Heyman;K Unterrainer;K Craig;B Galdrikian

  • Metallic wave-impedance matching layers for broadband terahertz optical systems.

    Josef Kröll;Juraj Darmo;Karl Unterrainer

  • Random lasers for broadband directional emission

    Sebastian Schönhuber;Martin Brandstetter;Thomas Hisch;Christoph Deutsch

  • Transition Between Coherent and Incoherent Electron Transport in GaAs / GaAlAs Superlattices

    C. Rauch;G. Strasser;K. Unterrainer;W. Boxleitner

  • Short pulse generation and mode control of broadband terahertz quantum cascade lasers

    Dominic Bachmann;Markus Rösch;Martin J. Süess;Mattias Beck

  • Analysis of silicon nitride partial Euler waveguide bends

    Florian Vogelbacher;Stefan Nevlacsil;Martin Sagmeister;Jochen Kraft

  • High power terahertz quantum cascade lasers with symmetric wafer bonded active regions

    Martin Brandstetter;Christoph Deutsch;Michael Krall;Hermann Detz

  • Ultrafast coherent electron transport in semiconductor quantum cascade structures

    F. Eickemeyer;K. Reimann;M. Woerner;T. Elsaesser

  • Time-domain measurement of intersubband oscillations in a quantum well

    James N. Heyman;Roland Kersting;Karl Unterrainer

  • GaAs/AlGaAs superlattice quantum cascade lasers at λ≈13 μm

    G. Strasser;S. Gianordoli;L. Hvozdara;W. Schrenk

  • Influence of doping on the performance of terahertz quantum-cascade lasers

    A. Benz;G. Fasching;A. M. Andrews;M. Martl

Frequent Co-Authors

Rudolf Bratschitsch
Rudolf Bratschitsch University of Münster
Jérôme Faist
Jérôme Faist ETH Zurich
Carlo Sirtori
Carlo Sirtori École Normale Supérieure
Arthur C. Gossard
Arthur C. Gossard University of California, Santa Barbara
Mattias Beck
Mattias Beck ETH Zurich
Alfred Leitenstorfer
Alfred Leitenstorfer University of Konstanz
Yanlin Song
Yanlin Song Chinese Academy of Sciences
Thomas Elsaesser
Thomas Elsaesser Max Planck Society
Mingzhu Li
Mingzhu Li Chinese Academy of Sciences

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