THz Imaging & Nonlinear Dynamics

Recent journal articles, conference publications and presentations, with links to publications and research data.

For earlier work, browse Alexandre Locquet’s Google Scholar profile.

Available online

  1. H. Shi, C. Blancher, M. Narayanan, P. Bhaskar, E. Emile, M. Kathaperumal, A. Locquet, and D.S. Citrin, “Terahertz nondestructive evaluation of heterogeneous packaging stackup: Multi-layer interposer”, Materials Science in Semiconductor Processing 218, 111189 (2027).

    Available online in 2026; assigned to the February 2027 journal issue.

Journal publications

2026

  1. H. Shi, R. Zito, S. Laureti, D.S. Citrin, A. Locquet, and M. Ricci, “Sparse virtual wave thermography for nondestructive evaluation using orthogonal matching pursuit”, NDT & E International 164, 103805 (2026).

  2. G. Vadali, H. Cherid, E. Émile, H. Shi, L. Jacobi, D. S. Citrin, C. Pradalier, and A. Locquet, “Terahertz reflectivity dataset: Reading text on both sides of the page”, Data in Brief 67, 112978 (2026).

    Open dataset: Terahertz Scans of Patterned Paper Sheets with Multiple Ink TypesRecherche Data Gouv · DOI: 10.57745/AWN8Y5

  3. R. Zito, H. Shi, M. Ricci, S. Laureti, D.S. Citrin, and A. Locquet, “Stratigraphic reconstruction from terahertz and ultrasonic signals by deconvolution: A review”, NDT & E International 158, 103524 (2026).

  4. M. Zhai, A. Locquet, W. He, X. Lu, and D.S. Citrin, “Dielectric properties of secondary mill scale: Advancing nondestructive terahertz hot-rolled steel surface characterization”, NDT & E International 158, 103585 (2026).

  5. R. de Mey, S.W. Jolly, A. Locquet, and M. Virte, “Agile Laser Wavelength Tuning Using Dynamic Targeting”, IEEE Photonics Technology Letters 38(6), 378–381 (2026).

  6. D.J. Silitonga, P. Pomarède, N.M. Bawana, H. Shi, N.F. Declercq, D.S. Citrin, F. Meraghni, and A. Locquet, “Automated classification of subsurface impact damage in thermoplastic composites using depth-resolved terahertz imaging and deep learning”, Composites Part B: Engineering 309, 113033 (2026).

  7. M. Zhai, H. Pan, D. Tian, C. Liu, C. Zhai, D.S. Citrin, J. Yi, and W. He, “Adaptive rectangular convolution and wavelet attention-based GAN for high-fidelity terahertz image super-resolution”, Optics & Laser Technology 203, Part E, 115777 (2026).

  8. M. Zhai, D. Tian, H. Pan, S. Sun, C. Zhai, C. Liu, W. He, and D.S. Citrin, “Terahertz time-domain image super resolution reconstruction based on lightweight recursive residual network”, Optics & Laser Technology 203, 115605 (2026).

2025

  1. H. Shi, P. Meilland, G. Ham, L. Turri, D.S. Citrin, and A. Locquet, “Estimation of Mill-Scale Thickness by Back-Propagation Neural Network for Pickling”, Metallurgical and Materials Transactions B 56, 1116–1126 (2025). DOI: 10.1007/s11663-024-03400-y. hal-04917413.

  2. H. Shi, G. Ham, P. Meilland, D.S. Citrin, and A. Locquet, “Enhanced terahertz nondestructive evaluation and stratigraphic reconstruction with filtered deconvolution”, NDT&E International 156, 103440 (2025).

  3.  M. Zhai, F. Gou, C. Ke, W. He, C. Zhai, A. Locquet, and D.S. Citrin, “Terahertz time-domain spectroscopy of boron nitride nanotube-reinforced PMMA composites”, Polym. Test. 147, 108812 (2025).

  4. G.O. Danilenko, A.V. Kovalev, D. S. Citrin, A. Locquet, D. Rontani, and E. A. Viktorov, “Reservoir computing with state-dependent time delay”, Phys. Rev. E 111, 035313 (2025).

2024

  1. P. Singh, L. Palmer, C. Xu, J. Kaufman, H. Fu, S. Strixner, H. Schweigart, M.R. Meier, C. Wang, M. Pudas, M. Smith, J. Payne, H. Remore, M. Zhai, S. Calvelli, H. Shi, A. Locquet, D.S. Citrin, D. Hampannavar, M.M. Khaw, K-L Tan, and H. Akbari, “Conformal Coating Testing in Various Test Environments”, Journal of Surface Mount Technology 37(1), 8–16 (2024). hal-04762479.

  2. M.S. Islam, A.V. Kovalev, G.O. Danilenko, E.A. Viktorov, D.S. Citrin, and A. Locquet, “Busse Balloon for Optical Frequency Combs From a Semiconductor Laser With Time-Delayed Optoelectronic Feedback”, Journal of Lightwave Technology 42(21), 7628–7633 (2024). hal-04762402.

  3. M. Zhai, S. Calvelli, H. Shi, M. Ricci, S. Laureti, P. Singh, H. Fu, A. Locquet, and D.S. Citrin, “Comparative Study of Nondestructive Mapping of Conformal-Coating Thickness on Microelectronics by Terahertz Time-of-Flight Tomography”, IEEE Transactions on Semiconductor Manufacturing 37(4), 499–504 (2024).

  4. M.S. Islam, A.V. Kovalev, G.O. Danilenko, E.A. Viktorov, D.S. Citrin, and A. Locquet, “Multiplet cascade in a semiconductor laser with optoelectronic feedback”, Appl. Phys. Lett. 124, 221107 (2024). Doi: 10.1063/5.0209837.  hal-04708301.

  5. H. Shi, S. Calvelli, M. Zhai, M. Ricci, S. Laureti, P. Singh, H. Fu, A. Locquet, and D.S. Citrin, “Terahertz Nondestructive Characterization of Conformal Coatings for Microelectronics Packaging”, IEEE Transactions on Components, Packaging and Manufacturing Technology 14(1), 3–9 (2024). hal-04651441v1.

  6. M. Zhai, A. Locquet, and D.S. Citrin, “Terahertz nondestructive stratigraphic reconstruction of paper stacks based on adaptive sparse deconvolution”, J. Europ. Opt. Society-Rapid. Publ. 20, 4 (2024). Doi: 10.1051/jeos/2024001. hal-04651528 Winner of the European Optical Society prize for 2024.

2023

  1. M. Zhai, P. Bhaskar, H. Shi, M. Swaminathan, A. Locquet, and D.S. Citrin, “Terahertz Characterization of Glass-Based Materials and Stackups for 6G Microelectronics Packaging”, Journal of Infrared, Millimeter, and Terahertz Waves 44, 841–857 (2023). hal-04675632.

  2. G.O. Danilenko, A.V. Kovalev, E.A. Viktorov, A. Locquet, D.S. Citrin, and D. Rontani, “Resonant properties of the memory capacity of a laser-based reservoir computer with filtered optoelectronic feedback”, Chaos 33, 113125 (2023). hal-04675611.

  3. P. Pomarède, N. Miqoi, D. Christophe, D.S. Citrin, F. Meraghni, and A. Locquet, “Terahertz pulsed imaging of low velocity impact damage in woven fiber composite laminates”, Journal of Composite Materials 57(30), 4719–4730 (2023). hal-04273370v1.

  4. D.S. Citrin, A. Locquet, and J. Dong, “Unearthing a Prayer for the Dead”, American Scientist 111(5), 280 (2023).

  5. P. Pomarède, J. Calvo-de la Rosa, P. Antonik, F. Meraghni, D.S. Citrin, D. Rontani, and A. Locquet, “THz-based Monitoring of the Deformation of the Inner Woven Structure of Glass-Fiber Reinforced Polymers”, IEEE Transactions on Terahertz Science and Technology 13(4), 396–404 (2023). hal-04273348v1.

  6. M. Zhai, A. Locquet, C. Roquelet, J.-L. Borean, P. Meilland, and D.S. Citrin, “Nondestructive tertiary mill-scale thickness measurement on commercial hot-rolled steel strip: Terahertz time-of-flight tomography”, Steel Research International 94, 2300124 (2023). hal-04273309v1.

  7. J. Calvo de la Rosa, P. Pomarède, P. Antonik, F. Meraghni, D.S. Citrin, D. Rontani, and A. Locquet, “Determination of the process-induced microstructure of woven glass fabric reinforced polyamide 6.6/6 composite using terahertz pulsed imaging”, NDT&E International 136, 102799 (2023). hal-04037541v1

  8. G.O. Danilenko, A.V. Kovalev, E.A. Viktorov, A. Locquet, D.S. Citrin, and D. Rontani, “Impact of filtering on photonic time-delay reservoir computing”, Chaos 33, 013116 (2023). hal-03943772v1

  9. P. Dubey, N.F. Declercq, M. Zhai, A. Locquet, M. Jung, D. Woo, and D.S. Citrin, “Acoustic microscopy characterization of highly-ordered anodized nanoporous alumina films for nanotechnology applications”, Surfaces and Interfaces 42, Part B, 103450 (2023). hal-03943887v1.

Conference publications and presentations

2026

  1. S. Mallick, H. Shi, H. Cherid, D.S. Citrin, C. Perrin-Mozet, A. Marotel, M.B. Caillierez, J. Hubert, W. Blondel, M. Amouroux, and A. Locquet, “Terahertz assisted optical constant based classification of urinary stones”, Tissue Optics and Photonics IV Proc. SPIE 14098 (2026).

  2. R. de Mey, S.W. Jolly, A. Locquet, and M. Virte, “Revisiting optical feedback: dynamic targeting for rapid and precise laser tuning”, Semiconductor Lasers and Laser Dynamics XII Proc. SPIE 14090 (2026).

2025

  1. M. Zhai, C. Ke, B. Xiao, W. He, A. Locquet, and D.S. Citrin, “Dielectric Characterization of Boron Nitride Nanotubes using Terahertz Time-Domain Spectroscopy”, IRMMW-THz, Espoo, Finland, 2025.

  2. M. Zhai, H. Pan, W. He, A. Locquet, and D.S. Citrin, “Delamination Characterization of GFRP Laminates Based on Canny Edge Detection Approach”, IRMMW-THz, Espoo, Finland, 2025.

  3. H. Shi, G. Ham, P. Meilland, D.S. Citrin, and A. Locquet, “Enhanced Terahertz Nondestructive Evaluation and Stratigraphic Reconstruction with Filtered Deconvolution”, IRMMW-THz, Espoo, Finland, 2025.

  4. H. Shi, R. Komatinenir, Y. Max, C. Pradalier, L. Jacobi, Y. Jiang, A. Locquet, and D. S. Citrin, “Reading Text on Both Sides of a Sheet of Paper with a Neural Network Classifier”, keynote presentation, IRMMW-THz, Espoo, Finland, 2025.

  5. H. Shi, P. Meilland, G. Ham, L. Turri, A. Locquet, and D. S. Citrin, “Estimation of mill scale thickness by back-propagation neural network for pickling”, IRMMW-THz, Espoo, Finland, 2025.

  6. H. Shi, M. Kathaperumal, A. Locquet, and D. S. Citrin, “Terahertz nondestructive evaluation of packaging substrate stackup: 8-layer interposer”, IRMMW-THz, Espoo, Finland, 2025.

  7. D. Silitonga, P. Pomarède, N. Bawana, H. Shi, N.F. Declercq, D.S. Citrin, F. Meraghni, and A. Locquet, “Deep Learning-Enhanced Terahertz Inspection of Barely Visible Impact Damage in Composites”, French-German THz Conference, Siegen, Germany (2025).

  8. S. Mallick, H. Shi, D. Silitonga, D.S. Citrin, C. Perrin-Mozet, W. Blondel, M. Amouroux, and A. Locquet, “Optical Constants of kidneys stones in the THz regime”, French-German THz Conference, Siegen, Germany (2025).

  9. H. Shi, D. Silitonga, D.S. Citrin, and A. Locquet, “Comparison of Deconvolution methods for delamination in GFRP”, French-German THz Conference, Siegen, Germany (2025).

  10. M. Zhai, W. He, A. Locquet, and D.S. Citrin, “Non-destructive Dielectric Characterization of Secondary Mill Scale on Hot-rolled Steel”, CLEO Europe, Munich, Germany (2025).

  11. S. Mallick, H. Shi, D. Citrin, C. Perrin-Mozet, A. Marotel, M.B. Caillierez, J. Hubert, W. Blondel, M. Amouroux, and A. Locquet, “Terahertz Spectroscopy-Based Characterization of Human Urinary Stones ex vivo”, European Conferences on Biomedical Optics (ECBO) paper S4E.3, Munich, Germany (2025).