My research interests include the applications and developement of terahertz spectroscopy techniques with particular emphasis on the study of ultrafast charge transport in semiconductors, spin injection in semiconductors, surface and interface non-linear optics as well as low frequency vibrations of biomolecular systems. I am also focusing on exploring uses of THz radiation in other disciplines such as biology, astronomy, conservation of objects with cultural value, medicine and industry.
Recent publications:
2026
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Cornelius Mach, Roksana Jachim, Jan Ornik, Alexander Jäckel, Jochen Taiber, Enrique Castro-Camus, Rudy Plarre, Martin Koch, Wolfgang Viöl & Kirsti Krügener.
Mobile terahertz spectroscopy for in-situ evaluation of structural characteristics in wooden artefacts.
npj Heritage Science 14, 401 (2026).
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Goretti G. Hernandez-Cardoso, Monica Ortiz-Martinez, Blanca O. Murillo-Ortiz, Alfredo Campos Mejia, Lauro F. Amador-Medina, Gerardo Gutierrez-Torres, Edgar S. Reyes-Reyes, Irving Salas-Gutierrez and Enrique Castro-Camus.
Terahertz Time-Domain imaging of feet of diabetic and non-diabetic patients.
Scientific Data (2026).
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Enrique Castro-Camus, Daniel Ferrusca, John Carpenter, David Hughes, Naser Qureshi, Raul O. Freitas, Elodie Strupiechonski, Jimy Oblitas, Mariana Alfaro-Gomez, Alma Montserrat Gomez-Sepulveda, Felix G. G. Hernandez, Federico Sanjuan and Monica Ortiz-Martinez.
Terahertz and mm-Wave Research in Latin America.
Journal of Infrared, Millimeter, and Terahertz Waves, 47, 27 (2026).
2025
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Felix Gorka, Enrique Castro-Camus, Daniel M. Mittleman and Martin Koch.
Diffraction Effects in Highly Defocused THz Beams.
Optics Express, 33, 51434-51443 (2025).
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Jochen Taiber, Jan Helminiak, Goretti G. Hernandez-Cardoso, Cornelius Mach, Alexander Jackel, Oscar A. Naranjo-Montoya, Enrique Castro-Camus, Peter Ache, Rainer Hedrich & Martin Koch.
The dynamics of stomatal closure of Arabidopsis thaliana determined by terahertz spectroscopy and a water transport model.
Scientific Reports, 15, 32675 (2025).
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Alexander Dohms, Mykhaylo P. Semtsiv, Tina C. Hesselman, Michael Schulz, Steffen Breuer, Lars Liebermeister, Martin Schell, Enrique Castro-Camus, Martin Koch, William T. Masselink and Robert B. Kohlhaas.
Rh-doped, InGaAs-based Quantum-Photoconductor with Superior Carrier Mobility-Lifetime Trade-off for THz Time-Domain Spectroscopy.
Journal of Infrared, Millimeter and Terahertz Waves, 46, 55 (2025).
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Alexander Jäckel, Cornelius Mach, Lauri Schwenson, Enrique Castro-Camus, Lars Liebermeister, Robert B. Kohlhaas, and Martin Koch.
Computationally efficient multi-layer thickness determination using sparse CW THz spectroscopy.
Optics Express, 33, 14812-14824 (2025).
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Enrique Castro-Camus, Abhishek K. Singh, Arely V. Perez-Lopez, Jose Antonio Morales-Hernandez, June Simpson, Socorro J. Villanueva-Rodriguez, and Monica Ortiz-Martinez.
Terahertz spectroscopy and imaging as a tool to unlock physiological and molecular mechanisms for drought resistance of agaves.
Applied Optics, 64, 2057-2062 (2025).
2024
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Lara Heidrich, Julian Wiener, Enrique Castro-Camus, Martin Koch and Jan Ornik.
Automated in-situ monitoring of accelerated crystallization processes of nifedipine using terahertz time-domain spectroscopy.
Scientific Reports, 14, 29928 (2024).
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Alexander Jäckel, Maximilian L. Hupfer, Enrique Castro-Camus, Daniel M. Mittleman, Gabriele Schmidl, Annett Gawlik, Jonathan Plentz & Martin Koch.
Terahertz conductivity mapping of thin films on smart textiles.
Scientific Reports, 14, 22029 (2024).
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Edgar Santiago Reyes-Reyes, Ramón Carriles-Jaimes, Emanuele D’Angelo, Saad Nazir, Corinna Ludovica Koch-Dandolo, Falko Kuester, Peter Uhd Jepsen and Enrique Castro-Camus.
Terahertz time-domain imaging for the examination of gilded wooden artifacts.
Scientific Reports, 14, 6261 (2024).
2023
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Martin Koch, Daniel M. Mittleman, Jan Ornik and Enrique Castro-Camus.
Terahertz time-domain spectroscopy.
Nature Reviews Methods Primers, 3, 48 (2023).
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Fatima Taleb, Mariana Alfaro-Gomez, Mohanad Dawood Al-Dabbagh, Jan Ornik, Juan Viana, Alexander Jackel, Cornelius Mach, Jan Helminiak, Thomas Kleine-Ostman, Thomas Kurner, Martin Koch, Daniel M. Mittleman and Enrique Castro-Camus.
Propagation of THz Radiation in Air Over a Broad Range of Atmospheric Temperature and Humidity Conditions.
Scientific Reports, 13, 20782 (2023).
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Mario Ferreira, Gilberto Brambilla, Luc Thevenaz, Xian Feng, Lei Zhang, Misha Sumetsky, Callum Jones, Srikanth Pedireddy, Frank Vollmer, Peter D Dragic, Ori Henderson-Sapir, David J Ottaway, Elodie Strupiechonski, Goretti Hernandez Cardoso, Arturo I. Hernandez-Serrano, Francisco J. Gonzalez, Enrique Castro-Camus, Alexis Mendez, Paola Saccomandi, Qimin Quan, Zhongcong Xie, Björn Reinhard and Max Diem.
Roadmap on Optical Sensors.
Journal of Optics, 26, 013001 (2024).
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Fatima Taleb, Goretti G. Hernandez-Cardoso, Enrique Castro-Camus and Martin Koch.
Transmission, reflection and scattering characterisation of building materials for indoor THz communications.
IEEE Transactions on Terahertz Science and Technology, 13, 421-430 (2023).
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Lara Heidrich, Ayat Abdelkader, Jan Ornik, Enrique Castro-Camus, Cornelia M. Keck and Martin Koch.
Terahertz Spectroscopy for Non-Destructive Solid-State Investigation of Norfloxacin in Paper Tablets after Wet Granulation.
Pharmaceutics, 15, 1786 (2023).
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Alfred Leitenstorfer, Andrey S. Moskalenko, Tobias Kampfrath, Junichiro Kono, Enrique Castro-Camus, Kun Peng, Naser Qureshi, Dmitry Turchinovich, Koichiro Tanaka, Andrea Markelz, Martina Havenith, Cameron Hough, Hannah J Joyce, Willie Padilla, Binbin Zhou, Ki-Yong Kim, Xi-Cheng Zhang, Peter Uhd Jepsen, Sukhdeep Dhillon, Miriam Serena Vitiello, Edmund H Linfield, Alexander Giles Davies, Matthias Hoffmann, Roger Lewis, Masayoshi Tonouchi, Pernille Klarskov, Tom Seifert, Yaroslav Gerasimenko, Dragan D Mihailovic, Rupert Huber, Jessica Boland, Oleg Mitrofanov, Paul Dean, Brian Ellison, Peter Huggard, Simon Rea, Christopher Walker, David Leisawitz, Jian Rong Gao, Chong Li, Qin Chen, Gintaras Valusis, Vincent Patrick Wallace, Emma MacPherson, Xiaobang Shang, Jeffrey Hesler, Nick Ridler, Cyril Renaud, Ingmar Kallfass, Tadao Nagatsuma, Axel Zeitler, Don Arnone, Michael Johnston and John Cunningham.
The 2023 Terahertz Science and Technology Roadmap.
Journal of Physics D: Applied Physics, 56, 223001 (2023).
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Jan Helminiak, Mariana Alfaro-Gomez, Goretti G. Hernandez-Cardoso, Martin Koch, and Enrique Castro-Camus.
Temperature dependence of the dielectric function of dehydrated biological samples in the THz band.
Biomedical Optics Express, 14, 1472-1479 (2023).
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Lara Heidrich, Jan Ornik, Cornelia M. Keck, Enrique Castro-Camus and Martin Koch.
Polyvinylpyrrolidone as co-inhibitor of crystallization of nifedipine in paper tablets.
International Journal of Pharmaceutics, 635, 122721 (2023).
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A. Pizzuto, E. Castro-Camus, D.M. Mittleman.
Nanoscale-Resolved Spatial Mapping of Tip-Mediated Terahertz Emission from Semiconductors.
Journal of Infrared, Millimeter and Terahertz Waves, 44, 769-779 (2023).
2022
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E.S. Reyes-Reyes, R. Carriles-Jaimes and E. Castro-Camus.
Algorithm for Determination of Cutoff Frequency of Noise Floor Level for Terahertz Time-Domain Signals.
Journal of Infrared, Millimeter, and Terahertz Waves, 43, 847-856 (2022).
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Frances E. M. Lambert, Jan Ornik, Naja-Anissa Staats, Alexander Jackel, Goretti G. Hernandez-Cardoso, Jochen Taiber, Eva-Maria Stubling, Benjamin Rudolph, Oliver Mack, Hans Portsteffen, Enrique Castro-Camus and Martin Koch.
Layer separation mapping and consolidation evaluation of a fifteenth century panel painting using terahertz time-domain imaging.
Scientific Reports, 12, 21038 (2022).
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Mostafa Agour, Claas Falldorf, Fatima Taleb, Enrique Castro-Camus, Martin Koch, Ralf B. Bergmann.
Characterization of terahertz wavefront aberrations using computational shear-interferometry.
Optical Engineering, 61, 114102 (2022).
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Alexander Jackel, David Ulm, Thomas Kleine-Ostmann, Enrique Castro-Camus, Martin Koch and Jan Ornik.
Achromatic Quarter-Waveplate for the Terahertz Frequency Range Made by 3D Printing.
Journal of Infrared, Millimeter, and Terahertz Waves, 43, 573-581 (2022).
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Rabi Shrestha, Zhaoji Fang, Hichem Guerboukha, Priyangshu Sen, Goretti G. Hernandez-Cardoso, Enrique Castro-Camus, Josep M. Jornet & Daniel M. Mittleman.
The effect of angular dispersion on THz data transmission.
Scientific Reports, 12, 10971 (2022).
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Mostafa Agour, Claas Falldorf, Fatima Taleb, Martin Koch, Ralf B. Bergmann, and Enrique Castro-Camus.
Chocolate inspection by means of phase-contrast imaging using multiple-plane terahertz phase retrieval.
Optics Letters, 47, 3283-3286 (2022).
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Jan Ornik, Lara Heidrich, Robert Schesny, Enrique Castro-Camus, Cornelia M. Keck and Martin Koch.
Non-destructive crystallinity assessment of indomethacin in tablets made from smartFilms(R) using terahertz time-domain spectroscopy.
Scientific Reports, 12, 6099 (2022).
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Xuequan Chen, Hannah Lindley-Hatcher, Rayko I. Stantchev, Jiarui Wang, Kaidi Li, Arturo Hernandez Serrano, Zachary D. Taylor, Enrique Castro-Camus, and Emma Pickwell-MacPherson.
Terahertz (THz) biophotonics technology: instrumentation, techniques, and biomedical applications.
Chemical Physics Reviews 3, 011311 (2022).
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Goretti G. Hernandez-Cardoso, Lauro F. Amador-Medina, Gerardo Gutierrez-Torres, Edgar S. Reyes-Reyes, Cesar Augusto Benavides Martinez, Cuitlahuac Cardona Espinoza, Jose Arce Cruz, Irving Salas-Gutierrez, Blanca O. Murillo-Ortiz, Enrique Castro-Camus.
Terahertz imaging demonstrates its diagnostic potential and reveals a relationship between cutaneous dehydration and neuropathy for diabetic foot syndrome patients.
Scientific Reports, 12, 3110 (2022).
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Enrique Castro-Camus, Martin Koch, Thomas Kleine-Ostmann, Andreas Steiger.
On the reliability of power measurements in the terahertz band.
Communications Physics, 5, 42 (2022).
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Mostafa Agour, Claas Fallorf, Fatima Taleb, Enrique Castro-Camus, Martin Koch and Ralf B. Bergmann.
Terahertz referenceless wavefront sensing by means of computational shear-interferometry.
Optics Express, 30, 7068-7081 (2022).
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Enrique Castro-Camus, Martin Koch and Daniel M. Mittleman.
Recent advances in terahertz imaging: 1999 to 2021.
Applied Physics B, 128, 12 (2022).
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A. Belio-Manzano, L.I. Espinosa-Vega, I.E. Cortes-Mestizo, C.A. Mercado-Ornelas, F. E. Perea-Parrales, S. Gallardo-Hernández, V.D. Compean-García, J.L. Regalado-de la Rosa, E. Castro-Camus, A. Yu Gorbatchev, Víctor H. Mendez-Garcia.
Hyperbolic-tangent composition-graded InxGa1-xAs/GaAs (100) structures grown by molecular beam epitaxy.
Materials Science in Semiconductor Processing 142, 106486 (2022).
2021
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Angela Pizzuto, Enrique Castro-Camus, William Wilson, Wonsik Choi, Xiuling Li, and Daniel M. Mittleman.
Nonlocal Time-Resolved Terahertz Spectroscopy in the Near Field.
ACS Photonics 8, 2904-2911 (2021).
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J.L. Regalado-de-la-Rosa, A. Belio-Manzano, V.H. Mendez-Garcia, E. Castro-Camus.
Terahertz emission from gradient InGaAs surfaces.
Applied Physics Letters 119, 171111 (2021).
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Jingjing Deng, Fatima Taleb, Jan Ornik, Enjie Ding, Martin Koch & Enrique Castro-Camus.
Quantitative Assessment of Rock-Coal Powder Mixtures by Terahertz Time Domain Spectroscopy.
Journal of Infrared, Millimeter, and Terahertz Waves 42, 742-746 (2021).
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J. Nguyen, K. Kesper, G. Kraling, C. Birk, P. Mross, N. Hofeditz, J. Hochst, P. Lampe, A. Penning, B. Leutenecker-Twelsiek, C. Schindler, H. Buchenauer, D. Geisel, C. Sommer, R. Henning, P. Wallot, T. Wiesmann, B. Beutel, G. Schneider, E. Castro-Camus & M. Koch.
Repurposing CPAP machines as stripped-down ventilators.
Scientific Reports 11, 12204 (2021).
2020
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Jingjing Deng, Jan Ornik, Kai Zhao, Enjie Ding, Martin Koch and Enrique Castro-Camus.
Recognition of coal from other minerals in powder form using terahertz spectroscopy.
Optics Express 28, 30943-30951 (2020).
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Kirsti Krugener, Jan Ornik, Lorentz M. Schneider, Alexander Jackel, Corinna L. Koch-Dandolo, Enrique Castro-Camus, Nicole Riedl-Siedow, Martin Koch and Wolfgang Viol.
Terahertz inspection of buildings and architectural art.
Applied Sciences 10, 5166 (2020).
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Johannes Seifert, Goretti Hernandez-Cardoso, Martin Koch, Enrique Castro-Camus.
Terahertz beam steering using active diffraction grating fabricated by 3D printing.
Optics Express 28, 21737-21744 (2020).
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Enrique Castro-Camus, Martin Koch and Arturo I. Hernandez-Serrano.
Additive manufacture of photonic components for the terahertz band.
Journal of Applied Physics 127, 210901 (2020).
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Enrique Castro-Camus, Jan Ornik, Cornelius Mach, Goretti Hernandez-Cardoso, Bhushan Savalia, Jochen Taiber, Armando Ruiz-Marquez, Karl Kesper, Srumika Konde, Caroline Sommer, Julian Wiener, David Geisel, Franziska Huppe, Gunter Kraling, Peter Mross, Johnny Nguyen, Thomas Wiesmann, Bjorn Beutel and Martin Koch.
Simple ventilators for emergency use based on Bag-Valve pressing systems: Lessons learned and future steps.
Applied Sciences 10, 7229 (2020).
Pre-print in medRxiv.
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A. K. Singh, A. V. Pérez-López, J. Simpson and E. Castro-Camus.
Three-dimensional water mapping of succulent Agave victoriae-reginae leaves by terahertz imaging.
Scientific Reports 10, 1404 (2020).
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G. G. Hernandez-Cardoso, A. K. Singh, E. Castro-Camus.
Empirical comparison between effective medium theory models for the dielectric response of biological tissue at terahertz frequencies.
Applied Optics 59, D6-D11 (2020).
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F. E. M. Lambert, E. S. Reyes-Reyes, G. G. Hernandez-Cardoso, A. M. Gomez-Sepulveda, E. Castro-Camus.
In-situ determination of the state of conservation of paint coatings on the kiosk of Guadalajara using terahertz time-domain spectroscopy.
Journal of Infrared, Millimeter and Terahertz Waves 41, 355-364 (2020).
