Selected publications featuring Protemics' TeraSpike microprobe technology in descending chronological order:

Photoconductive THz near-field detectors operated with a 1550 nm cw-laser system for high spatial-and spectral-resolution measurements

S. Sawallich, A. Deninger, A. Michalski, et al.

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) [DOI]

Microprobe-based Terahertz Near-field Imaging of Highly Scattering Pharmaceutical Coatings on Small Tablets

M. Wolfgang, A. Michalski, M. Nagel, et al.

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) [DOI]

On-Chip THz Time-Domain Spectroscopy Sensor with Adjustable Sample Interaction by a Daughterboard

J. Lee, S. Sawallich, M.C. Lemme, et al.

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) [DOI]

A novel scattering-type THz microprobe with integrated source and detector for contact-free, high-speed surface imaging at sub-μm-resolution

M. Priwisch, M. Nagel, A. Michalski, et al.

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) [DOI]

On-Chip Time-Domain Terahertz Spectroscopy of Superconducting Films below the Diffraction Limit

Alex M. Potts, Abhay K. Nayak, Michael Nagel, et al.

Nano Lett. 2023, 23, 9, 3835–3841. [DOI]

Real-space imaging and control of chiral anomaly induced current at room temperature in topological Dirac semimetal

B.C. Park, T. Ha, K.I. Sim, et al.

Science Advances, Vol. 8, Issue 47 (2022). [DOI (Open Access)]

High-Frequency Sheet Conductance of Nanolayered WS2 Crystals for Two-Dimensional Nanodevices

Stan E.T. ter Huurne, Adonai Rodrigues Da Cruz, Niels van Hoof, et al.

ACS Appl. Nano Mater. (2022). [DOI]

Flexible Terahertz Photonic Light-Cage Modules for In-Core Sensing and High Temperature Applications

Alessio Stefani, Boris T. Kuhlmey, Justin Digweed, et al.

ACS Photonics 2022 (2022). [DOI]

In situ cell detection using terahertz near-field microscopy

Zaoxia Li, Ziyi Zang, Jie Wang, et al.

IEEE Transactions on Terahertz Science and Technology (2022). [DOI: 10.1109/TTHZ.2022.3170010]

Terahertz near-field spectroscopy for various applications

Changwon Seo and Teun-Teun Kim

J. Korean Phys. Soc. (2022). [DOI: https://doi.org/10.1007/s40042-022-00404-2]

Review of THz-based semiconductor assurance

John True, Chengjie Xi, Nathan Jessurun, et al.

Optical Engineering, 60(6), 060901 (2021). [DOI (Open Access)]

Terahertz Based Machine Learning Approach to Integrated Circuit Assurance

J. True, C. Xi, N. Jessurun, et al.

2021 IEEE 71st Electronic Components and Technology Conference (ECTC), 2021, pp. 2235-2245, doi: 10.1109/ECTC32696.2021.00351 (2021). [DOI]

Mapping Ultrafast Electric Fields using Terahertz Microscopy

Niels J.J.van Hoof

Eindhoven : Technische Universiteit Eindhoven, 135 p.(2021). [PDF]

Unveiling Symmetry Protection of Bound States in the Continuum with Terahertz Near-field Imaging

Niels J.J.van Hoof, Diego R. Abujetas, Stan E.T. ter Huurne, et al.

arXiv:2105.11937 [physics.optics] (2021). [HTML]

Large-area integration of two-dimensional materials and their heterostructures by wafer bonding

Arne Quellmalz, Xiaojing Wang, Simon Sawallich et al.

Nature Communications volume 12, Article number: 917 (2021). [PDF]

Graphene-based thin-films for flexible applications inspected by high-resolution Terahertz near-field inspection

Simon Sawallich, Burkay Uzlu, Martin R. Lohe et al.

46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) (2021). [HTML]

Terahertz Near-field Inspection of Metallic Nano-gap Grating for Contrast-Enhanced Interaction with Two-dimensional Materials

Jimin Lee, Simon Sawallich, Joachim Mayer and Michael Nagel

46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) (2021). [HTML]

High-resolution Terahertz near-field reflection measurements for complementary non-destructive inspection of integrated circuits

Alexander Michalski, Simon Sawallich, John True et al.

46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) (2021). [HTML]

A Terahertz s-SNOM tip with integrated photoconductive emitter switch evaluated on an AFM-system platform

S. Schäffer, Y. Loth, M. Nagel et al.

46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) (2021). [HTML]

Stacking of Two-Dimensional Materials to Large-Area Heterostructures by Wafer Bonding

Arne Quellmalz, Simon Sawallich, Maximilian Prechtl et al.

Conference on Lasers and Electro-Optics (CLEO) (2021). [HTML]

Wafer-scale inspection of graphene conductivity by THz near-field scanning: As-grown on sapphire and after transfer to SiO2/Si

Alexander Michalski, Simon Sawallich, Simonas Krotkus, et al.

45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), (2020). [URL]

Investigation of THz imaging artifacts generated by oversampling and interpolation of diffraction-limited low-resolution data

Simon Sawallich, Alexander Michalski and Michael Nagel

45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), (2020). [URL]

A novel scattering-type SNOM-tip featuring a micro-integrated bias-free optically driven terahertz pulse emitter

M. Nagel, S. Sawallich, A. Michalski, et al.

45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), (2020). [URL]

A 1550-nm-wavelength compatible photoconductive microprobe transceiver for Terahertz near-field reflection measurements

Alexander Michalski, Simon Sawallich and Michael Nagel

45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), (2020). [URL]

Terahertz Spoof Surface Plasmonic Logic Gates

Mingrui Yuan, Qingwei Wang, Yanfeng Li, et al.

iScience, (2020). https://doi.org/10.1016/j.isci.2020.101685 [DOI]

Spin–orbit torque switching of a ferromagnet with picosecond electrical pulses

Kaushalya Jhuria, Julius Hohlfeld, Akshay Pattabi, et al.

Nature Electronics, (2020). https://doi.org/10.1038/s41928-020-00488-3 [DOI]

Identifying Fibrillization State of Aβ Protein via Near-Field THz Conductance Measurement

Chaejeong Heo, Taewoo Ha, Chunjae You, et al.

ACS Nano Article ASAP. [DOI]

Single cell imaging with terahertz near-field scanning microscopy

Zaoxia Li, Shihan Yan, Ziyi Zang, et al.

Cell Prolif. 2020; 00:e12788. [DOI]

Guided terahertz pulse reflectometry with double photoconductive antenna

Mingming Pan, Quentin Cassar, Frédéric Fauquet et al.

Applied Optics Vol. 59, Issue 6, pp. 1641-1647 (2020)[DOI]

Terahertz surface plasmonic waves: a review

Xueqian Zhang, Quan Xu, Lingbo Xia et al.

Advandec Photonics 2020, 014001-1, Vol 2(1)  [HTML]

THz near-field inspection of metamaterials for bio-sensing applications featuring single-resonator read-out capability

Simon Sawallich, Alexander Michalski, Bartos Chmielak, et al.

44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), (2019). [URL]

Advanced photoconductive Terahertz near-field microprobes for 1550 nm wavelength operation based on InGaAs:Rh

Michael Nagel, Alexander Michalski, Simon Sawallich, et al.

44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), (2019). [URL]

Terahertz Near-field Inspection for High-resolution Conductivity and Mobility Mapping of Large-area Graphene

Alexander Michalski, Simon Sawallich, Michael Nagel

44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), (2019). [URL]

High-Resolution THz Imaging for Optimized polySi Patterning Process

A. Mewe, M. Stodolny, P. Manshanden, et al.

36th European Photovoltaic Solar Energy Conference and Exhibition, pp. 201-204 (2019)

Industrial Applications of Terahertz Sensing: State of Play

M. Naftaly, N. Vieweg and A. Deninger

Sensors 2019, 19(19), 4203 [DOI]

Role of Substrate Surface Morphology on the Performance of Graphene Inks for Flexible Electronics

J. Ruhkopf, S. Sawallich, M. Nagel, et al.

ACS Applied Electronic Materials 2019 1 (9), 1909-1916 [DOI]

Terahertz Time‐Domain Spectroscopy and Near‐Field Microscopy of Transparent Silver Nanowire Networks

Niels van Hoof, Matteo Parente, Andrea Baldi and Jaime Gómez Rivas, 

Adv. Optical Mater. 2019, 1900790.  [HTML]

Diffraction enhanced transparency in a hybrid gold-graphene THz metasurface

N.J.J. van Hoof, S.E.T. ter Huurne, R.H.J. Vervuurt, et al., 

APL Photonics 4, 036104 (2019) [HTML]

Terahertz orbital angular momentum modes with flexible twisted hollow core antiresonant fiber

Alessio Stefani, Simon C. Fleming, and Boris T. Kuhlmey

APL Photonics, 3, 051708 (2018); [https://doi.org/10.1063/1.5016283]

All CVD Boron Nitride Encapsulated Graphene FETs With CMOS Compatible Metal Edge Contacts

H. Pandey, M. Shaygan, S. Sawallich,, et al., 

IEEE Trans. on El. Dev., 65, 10 pp. 4129 - 4134 (2018) [HTML]

Towards the Development of THz-Sensors for the Detection of African Trypanosomes

R. Knieß, C. B. Wagner, H. U. Göhringer, et al., 

Frequenz, 72, 3-4, pp. 101–111 (2018) [HTML]

Time-resolved terahertz time-domain near-field microscopy

N. J. J. van Hoof, S. E. T. ter Huurne, J. Gómez Rivas, and A. Halpin.

Optics Express Vol. 26, Issue 24, pp. 32118-32129 (2018) [HTML]

Imaging Brain Tissue Slices with Terahertz Near‐Field Microscopy

Guoshuai Geng, Guangbin Dai, Dandan Li, et al.

Biotechnol Progress. (2018) [HTML]

Guided terahertz pulsed reflectometry: a remote probe for near-field imaging

Mingming Pan, Frédéric Fauquet, Dean Lewis, et al.

Proceedings Volume 10531, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI; 105310L (2018) [HTML]

Terahertz spoof surface-plasmon-polariton subwavelength waveguide

Ying Zhang, Yuehong Xu, Chunxiu Tian, et al.

Photonics Research Vol. 6, Issue 1, pp. 18-23 (2018) [HTML]

Ultrafast magnetization reversal by picosecond electrical pulses

Yang Yang, Richard B. Wilson, Jon Gorchon, et al.

Science Advances, Vol. 3 Issue 11 (2017). [HTML] 

Electric current induced ultrafast demagnetization

Richard B. Wilson, Yang Yang, Jon Gorchon, et al.

Phys. Rev. B 96, 045105 (2017). [HTML] 

Enablers for IBC: integral cell and module development and implementation in PV industry

I. Cesar, N. Guillevin, A. A. Mewe, et al.

Energy Procedia, Vol. 124, pp. 834-841 (2017). [HTML] 

Terahertz diffraction enhanced transparency probed in the near field

A. Halpin, N. v. Hoof, A. Bhattacharya, C. Mennes, and J. G. Rivas

Phys. Rev. B 96, 085110 (2017). [HTML]

High resolution THz scanning for optimization of dielectric layer opening process on doped Si surfaces

P. Spinelli, F.J.K. Danzl, D. Deligiannis, et al.

IEEE 44th Photovoltaic Specialist Conference (PVSC), Washington DC, June 25 - 30 (2017). [PDF]

Fiber-Drawn Metamaterial for THz Waveguiding and Imaging

S. Atakaramians, A. Stefani, H. Li, et al.

J Infrared Milli Terahz Waves (2017). doi:10.1007/s10762-017-0383-0 [HTML]

Terahertz surface plasmon polariton waveguiding with periodic metallic cylinders

Ying Zhang, Shaoxian Li, Quan Xu, et al.

Optics Express Vol. 25, Issue 13, pp. 14397-14405 (2017) [HTML]

Visualizing near-field coupling in terahertz dolmens

A. Halpin, C. Mennes, A. Bhattacharya, and J. Gómez Rivas

Appl. Phys. Lett. 110, 101105 (2017); doi: 10.1063/1.4978031 [HTML]

Simultaneous measurement of doping concentration and carrier lifetime in silicon using terahertz time-domain transmission

M. Lenz, C. Matheisen, M. Nagel, and J. Knoch

Appl. Phys. Lett. 110, 072103 (2017); doi: 10.1063/1.4976314 [HTML]

Photoconductive microprobe based near-field scanning of Terahertz resonances of a single high-index TiO₂ microsphere

M. Nagel, S. Sawallich, C. Elissalde, P. Mounaix, C. Matheisen

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2016 41th International Conference on, (2016). [HTML]

Contact-free high-resolution conductivity mapping of large-area graphene covered with an ion gel top-gate

S. Sawallich, M. Mohsin, C. Matheisen, D. Neumaier, M. Nagel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2016 41th International Conference on, (2016). [HTML]

High resolution sheet resistance mapping to unveil edge effects in industrial IBC solar cells

P. Spinelli, P. Danzl, N. Guillevin, A. Mewe, S. Sawallich, A. Vlooswijk, Bas van de Loo, Erwin Kessels, Michael Nagel, Ilkay Cesar

Energy Procedia 92, 218-224 (2016). [HTML]

Photoconductive Terahertz Near-Field Detectors for Operation With 1550-nm Pulsed Fiber Lasers

S. Sawallich, B. Globisch, C. Matheisen, M. Nagel, R. JB Dietz, and T. Göbel

IEEE Transactions on Terahertz Science and Technology, 99, 1-6, (2016). [HTML]

Large near-to-far field spectral shifts for terahertz resonances

A. Bhattacharya, G. Georgiou, S. Sawallich, C. Matheisen, M. Nagel, and J. Gómez Rivas

Phys. Rev. B 93, 035438 (2016). [HTML] 

Mapping the near-field propagation of surface plasmons on terahertz metasurfaces 

Y. Xu, X. Zhang, Z. Tian, J. Gu, C. Ouyang, Y. Li, J. Han, and W. Zhang

Appl. Phys. Lett. 107, 021105 (2015). [HTML]

Coplanar stripline (CPS) emitter and transceiver microprobes for ultra-high bandwidth on-chip Terahertz measurements

C. Matheisen, M. Nagel, S. Sawallich

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on, 1-2 (2015). [HTML]

High-resolution interdigitated back contact solar cell inspection using Terahertz microprobe

S. Sawallich, C. Matheisen, M. Nagel, I. Cesar

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on, 1-2 (2015). [HTML]

Investigation of dopant segregation induced surface-fields using THz pulse transmission

M. Lenz, A. Kianfar, S. Nordmann, S. Sawallich, M. Nagel, B. Berghoff, and J. Knoch

IEEE 42nd Photovoltaic Specialist Conference (PVSC), 1-4 (2015). [HTML]

Time-domain high-speed read-out of terahertz resonator arrays with sub-single-resonator resolution

M. Nagel, C. Matheisen, S. Sawallich

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on, 1-2 (2015). [HTML]

Photoconductive microprobe enabled on-chip and wafer-scale Terahertz sensing applications

M. Nagel, C. Matheisen, S. Sawallich, H. Kurz

Optical Sensors, Optical Society of America, SeM2D.5 (2015). [HTML]

THz near-field microscopy of semiconductor and metal bowtie antennas

A. Bhattacharya, G. Georgiou, S. Sawallich, C. Matheisen, M. Nagel, J. Gomez Rivas

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on (2014). [PDF]

Electro-optic light modulation and THz generation in locally plasma-activated silicon nanophotonic devices

C. Matheisen, M. Waldow, B. Chmielak, S. Sawallich, T. Wahlbrink, J. Bolten, M. Nagel, and H. Kurz

Opt. Express, Vol. 22, Issue 5, pp. 5252-5259 (2014). [PDF]

THz microprobe system for contact-free high-resolution sheet resistance imaging

M. Nagel, A. Safiei, S. Sawallich, C. Matheisen, T. M. Pletzer, A. A. Mewe, N. J. C. M. van der Borg, I. Cesar, and H. Kurz

28th European Photovoltaic Solar Energy Conference and Exhibition, pp. 856-860 (2013). [PDF]

Polymer identification with terahertz technology

A. Maul and M. Nagel

OCM 2013-Optical Characterization of Materials-conference proceedings, 265 (2013). [html]

Novel techniques in terahertz imaging and sensing

M. Nagel, C. Matheisen, H. Kurz

Handbook of Terahertz Technology for Imaging, Sensing and Communications. Edited by D. Saeedkia, Woodhead Publishing Ltd. 2013. [ISBN 978-0-85709-649-4]

Experimental demonstration of phase-matched THz generation in plasma-activated silicon nanophotonic emitters

S. Sawallich, C. Matheisen, M. Nagel, T. Wahlbrink, J. Bolten, H. Kurz

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on (2013). [PDF]

High-Speed Near-Field Imaging System Based On Photoconductive Terahertz Microprobes

C. Matheisen, M. Nagel, S. Sawallich, H. Kurz, G. Georgiou, J. Gomez-Rivas

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on (2013).

Terahertz Transceiver Microprobe For Chip-Inspection Applications Using Optoelectronic Time-Domain Reflectometry

M. Nagel, C. Matheisen, S. Sawallich, H. Kurz, S. Dobritz

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on (2013).

Active Terahertz near-field probes for high-resolution free-carrier density imaging applications

M. Nagel, A. Safiei, T. Pletzer, H. Kurz

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on (2012). [DOI] [URL]

Continuous-wave terahertz near-field spectroscopy and imaging with a micro-machined photomixer probe-tip

M. Nagel, C. Matheisen, A. Deninger, H. Kurz

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on (2012). [DOI] [URL]

Terahertz reflectometry images faults in silicon chips

M. Nagel and H. Kurz

Laser Focus World, 47, 11, pp 61-64 (2011) [URL]

Near-field investigation of THz surface-wave emission from optically excited graphite flakes

M. Nagel, A. Michalski, T. Botzem and H. Kurz

Opt. Express., 2, 2011. Vol. 19(5), pp. 4667-4672. OSA. [DOI] [URL]

Pockels effect based fully integrated, strained silicon electro-optic modulator

B. Chmielak, M. Waldow, C. Matheisen, C. Ripperda, J. Bolten, T. Wahlbrink, M. Nagel, F. Merget, and H. Kurz

Optics Express, Vol. 19, Issue 18, pp. 17212-17219 (2011). [DOI] [URL]

Contact-free fault location and imaging with on-chip terahertz time-domain reflectometry

M. Nagel, A. Michalski and H. Kurz

Opt. Express., 6, 2011. Vol. 19(13), pp. 12509-12514. [DOI] [URL]

A new technique to measure loss, effective refractive index and electric field distribution of THz porous fibers

S. Atakaramians, S. Afshar V., M. Nagel, T. M. Monro, and D. Abbott

CLEO: Science and Innovations, Baltimore, Maryland United States, May 1-6 (2011) [DOI] [URL]

Direct probing of evanescent field for characterization of porous terahertz fibers

S. Atakaramians, S. Afshar V., M. Nagel, H. K. Rasmussen, O. Bang, T. M. Monro and D. Abbott

Appl. Phys. Lett. 98, 121104 (2011) [DOI] [URL]

Optical generation of terahertz and second-harmonic light in plasma-activated silicon nanophotonic structures

M. Wächter, C. Matheisen, M. Waldow, T. Wahlbrink, J. Bolten, M. Nagel and H. Kurz

Appl. Phys. Lett. 97, 161107 (2010) [DOI] [URL] [PDF]

Fluidic channel waveguide coupler for nl-volume sensing applications

M. Wächter, M. Nagel and H. Kurz

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on [DOI] [URL]

Terahertz near-field imaging with tapered sommerfeld-wire waveguides

M. Awad, M. Nagel and H. Kurz

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on [DOI] [URL]

Free-standing tapered probe-tip for high resolution photoconductive terahertz field sampling

M. Wächter, M. Nagel and H. Kurz

Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on [DOI] [URL]

Tapered photoconductive terahertz field probe tip with subwavelength spatial resolution

M. Wächter, M. Nagel and H. Kurz

Appl. Phys. Lett. 95, 041112 (2009) [DOI] [URL]

Tapered Sommerfeld wire terahertz near-field imaging

M. Awad, M. Nagel and H. Kurz

Appl. Phys. Lett. 94, 051107 (2009) [DOI] [URL]