Overview
Background
Dr. Karl Bertling has made significant contributions to pioneering imaging and sensing via laser feedback interferometry, spanning diverse laser technologies including sensors based on visible lasers, infrared surface-emitting lasers, mid-infrared inter-band cascade lasers, and terahertz quantum cascade lasers. His current research focus includes leveraging terahertz quantum cascade laser feedback interferometry for early melanoma detection and agri-photonics, as well as near-field terahertz and mid-infrared imaging of nanomaterials and nanostructures.
Availability
- Dr Karl Bertling is:
- Available for supervision
Fields of research
Qualifications
- Bachelor of Science in Physics, The University of Queensland
- Bachelor (Honours) of Engineering - Electrical, The University of Queensland
- Masters (Research) of Engineering - Electrical, The University of Queensland
- Doctor of Philosophy, The University of Queensland
Works
Search Professor Karl Bertling’s works on UQ eSpace
Featured
2024
Journal Article
Terahertz nanoscopy: advances, challenges, and the road ahead
Guo, Xiao, Bertling, Karl, Donose, Bogdan C., Brünig, Michael, Cernescu, Adrian, Govyadinov, Alexander A. and Rakić, Aleksandar D. (2024). Terahertz nanoscopy: advances, challenges, and the road ahead. Applied Physics Reviews, 11 (2) 021306. doi: 10.1063/5.0189061
2024
Journal Article
Terahertz in vivo imaging of human skin: toward detection of abnormal skin pathologies
Qi, X., Bertling, K., Torniainen, J., Kong, F., Gillespie, T., Primiero, C., Stark, M. S., Dean, P., Indjin, D., Li, L. H., Linfield, E. H., Davies, A. G., Brünig, M., Mills, T., Rosendahl, C., Soyer, H. P. and Rakić, A. D. (2024). Terahertz in vivo imaging of human skin: toward detection of abnormal skin pathologies. APL Bioengineering, 8 (1) 016117, 016117. doi: 10.1063/5.0190573
Featured
2023
Journal Article
Ultrasound in solids: how to use laser feedback interferometry to visualize elastic waves
Bertling, Karl, Veidt, Martin, Perchoux, Julien and Rakic, Aleksandar (2023). Ultrasound in solids: how to use laser feedback interferometry to visualize elastic waves. Optics Express, 31 (20) 497676, 32761-32771. doi: 10.1364/oe.497676
Featured
2023
Journal Article
Near-field localization of the boson peak on tantalum films for superconducting quantum devices
Guo, Xiao, Degnan, Zachary, Steele, Julian A., Solano, Eduardo, Donose, Bogdan C., Bertling, Karl, Fedorov, Arkady, Rakić, Aleksandar D. and Jacobson, Peter (2023). Near-field localization of the boson peak on tantalum films for superconducting quantum devices. The Journal of Physical Chemistry Letters, 14 (20), 4892-4900. doi: 10.1021/acs.jpclett.3c00850
Featured
2023
Book Chapter
Self-mixing in quantum cascade lasers: theory and applications
Dean, Paul, Keeley, Jay, Lim, Yah Leng, Bertling, Karl, Taimre, Thomas, Rubino, Pierluigi, Indjin, Dragan and Rakic, Aleksandar (2023). Self-mixing in quantum cascade lasers: theory and applications. Mid-infrared and terahertz quantum cascade lasers. (pp. 477-508) edited by Dan Botez and Mikhail A. Belkin. Cambridge, United Kingdom: Cambridge University Press. doi: 10.1017/9781108552066
2021
Journal Article
Near-field terahertz nanoscopy of coplanar microwave resonators
Guo, Xiao, He, Xin, Degnan, Zach, Donose, Bogdan C., Bertling, Karl, Fedorov, Arkady, Rakić, Aleksandar D. and Jacobson, Peter (2021). Near-field terahertz nanoscopy of coplanar microwave resonators. Applied Physics Letters, 119 (9) 091101, 1-6. doi: 10.1063/5.0061078
Featured
2021
Journal Article
Optical constants from scattering-type scanning near-field optical microscope
Guo, Xiao, Bertling, Karl and Rakić, Aleksandar D. (2021). Optical constants from scattering-type scanning near-field optical microscope. Applied Physics Letters, 118 (4) 0036872, 041103. doi: 10.1063/5.0036872
Featured
2019
Journal Article
Sensing and imaging using laser feedback interferometry with quantum cascade lasers
Rakić, A. D., Taimre, T., Bertling, K., Lim, Y. L., Dean, P., Valavanis, A. and Indjin, D. (2019). Sensing and imaging using laser feedback interferometry with quantum cascade lasers. Applied Physics Reviews, 6 (2) 021320, 021320. doi: 10.1063/1.5094674
Featured
2019
Journal Article
Coherent imaging using laser feedback interferometry with pulsed-mode terahertz quantum cascade lasers
Lim, Yah Leng, Bertling, Karl, Taimre, Thomas, Gillespie, Tim, Glenn, Chris, Robinson, Ashley, Indjin, Dragan, Han, Yingjun, Li, Lianhe, Linfield, Edmund H., Davies, A. Giles, Dean, Paul and Rakić, Aleksandar D. (2019). Coherent imaging using laser feedback interferometry with pulsed-mode terahertz quantum cascade lasers. Optics Express, 27 (7), 10221-10233. doi: 10.1364/oe.27.010221
Featured
2015
Journal Article
Laser feedback interferometry: a tutorial on the self-mixing effect for coherent sensing
Taimre, Thomas, Nikolic, Milan, Bertling, Karl, Lim, Yah Leng, Bosch, Thierry and Rakic, Aleksandar (2015). Laser feedback interferometry: a tutorial on the self-mixing effect for coherent sensing. Advances in Optics and Photonics, 7 (3), 570-631. doi: 10.1364/AOP.7.000570
Featured
2014
Journal Article
Imaging of acoustic fields using optical feedback interferometry
Bertling, Karl, Perchoux, Julien, Taimre, Thomas, Malkin, Robert, Robert, Daniel, Rakic, Aleksandar D. and Bosch, Thierry (2014). Imaging of acoustic fields using optical feedback interferometry. Optics Express, 22 (24), 30346-30356. doi: 10.1364/OE.22.030346
2026
Journal Article
Passive beam shaping for terahertz quantum cascade lasers
Zhou, Tao, Silva, Jorge, Bertling, Karl, Qi, Xiaoqiong, Gillespie, Tim, Torniainen, Jari, Leslie, Andrew, Herbert, Jeremy, Kirkeby, Bent, Ngo, Ethan, Indjin, Dragan, Dean, Paul, Valavanis, Alexander, Li, Lianhe, Linfield, Edmund H., Davies, A. Giles and Rakić, Aleksandar D. (2026). Passive beam shaping for terahertz quantum cascade lasers. IEEE Transactions on Terahertz Science and Technology, 1-10. doi: 10.1109/tthz.2026.3667748
2026
Other Outputs
Quantum cascade laser roadmap
Silvestri, Carlo, Rakić, Aleksandar D., Indjin, Dragan, Khalatpour, Ali, Jirauschek, Christian, Demic, Aleksandar, Ikonic, Zoran, Dean, Paul, Vuković, Nikola, Radovanović, Jelena, Li, Lianhe, Linfield, Edmund, Jaidl, Michael, Unterrainer, Karl, Scalari, Giacomo, Faist, Jérôme, Columbo, Lorenzo Luigi, Brambilla, Massimo, Piccardo, Marco, Dhillon, Sukhdeep, Roy, Mithun, Burghoff, David, Bertling, Karl, Torniainen, Jari, Qi, Xiaoqiong, Taimre, Thomas, Spitz, Olivier, Grillot, Frédéric, Giglio, Marilena ... Borri, Simone (2026). Quantum cascade laser roadmap. doi: 10.48550/arXiv.2602.17042
2026
Other Outputs
Passive beam shaping for terahertz quantum cascade lasers
Zhou, Tao, Silva, Jorge, Bertling, Karl, Qi, Xiaoqiong, Gillespie, Tim, Torniainen, Jari, Leslie, Andrew, Herbert, Jeremy, Kirkeby, Bent, Ngo, Ethan, Dragan Indjin, Paul Dean, Alexander Valavanis, Lianhe Li, Edmund H. Linfield, A. Giles Davies and Aleksandar D. Rakic (2026). Passive beam shaping for terahertz quantum cascade lasers. The University of Queensland. (Dataset) doi: 10.48610/a02ef1c
2026
Journal Article
The Taj Mahal conservation and the scope of electromagnetic sensing
Bandyopadhyay, Aparajita, Chanda, Puspita, Aalam, Uzair, Khatri, Kashika, Bertling, Karl, Torniainen, Jari, Rakić, Aleksandar D. and Sengupta, Amartya (2026). The Taj Mahal conservation and the scope of electromagnetic sensing. Journal of Physics: Photonics, 8 (1) 012004, 012004. doi: 10.1088/2515-7647/ae3a25
2025
Journal Article
Liouvillian superoperator and maxwell–bloch dynamics under optical feedback via the self-mixing effect in terahertz quantum cascade lasers
Demić, Aleksandar, Ikonić, Zoran, Dean, Paul, Qi, Xiaoqiong, Taimre, Thomas, Bertling, Karl, Rakić, Aleksandar D. and Indjin, Dragan (2025). Liouvillian superoperator and maxwell–bloch dynamics under optical feedback via the self-mixing effect in terahertz quantum cascade lasers. Photonics, 12 (11) 1134, 1-22. doi: 10.3390/photonics12111134
2025
Conference Publication
Terahertz time domain and laser feedback interferometry study of sulfur inclusion in marble
Chanda, Puspita, Bertling, Karl, Aalam, Uzair, Kashyap, Mayuri, Torniainen, Jari, Guo, Xiao, Gillespie, Tim, Indjin, Dragan, Li, Lianhe, Linfield, Edmund H., Davies, A. Giles, Dean, Paul, Bandyopadhyay, Aparajita, Sengupta, Amartya and Rakić, Aleksandar. D. (2025). Terahertz time domain and laser feedback interferometry study of sulfur inclusion in marble. 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Helsinki, Finland, 17-22 August 2025. Piscataway, NJ United States: Institute of Electrical and Electronics Engineers. doi: 10.1109/irmmw-thz61557.2025.11319883
2025
Conference Publication
Near-field optical microscopy for spatially confined nanostructures
Guo, Xiao, Bertling, Karl, Belonohy, Daniella, Zhang, Xueqin, Wang, Zhiyao, Virdis, Bernardino, Mathel, Vincent, Aziz, Shazed, Heitzman, Michael, Vandi, Luigi-Jules, Degnan, Zachary, Steele, Julian A., Jacobson, Peter, Chanda, Puspita, Torniainen, Jari, Donose, Bogdan C., Brünig, Michael and Rakić, Aleksandar D. (2025). Near-field optical microscopy for spatially confined nanostructures. 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Helsinki, Finland, 17-22 August 2025. Piscataway, NJ, United States: IEEE. doi: 10.1109/irmmw-thz61557.2025.11319789
2025
Conference Publication
3D terahertz tomography for in-situ semiconductor chip inspection
Torniainen, J., Bertling, K., Silva, J., Gilliespie, T., Li, L.H., Indjin, D, Davies, A.G., Linfield, E.H., Dean, P. and Rakić, A.D. (2025). 3D terahertz tomography for in-situ semiconductor chip inspection. 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Helsinki, Finland, 17-22 August 2025. Piscataway, NJ, United States: IEEE. doi: 10.1109/irmmw-thz61557.2025.11319593
2025
Conference Publication
Visualizing terahertz-tissue interactions for early skin pathology detection
Torniainen, J., Qi, X., Bertling, K., Kong, F., Gillespie, T., Primiero, C., Stark, M. S., Dean, P., Indjin, D, Li, L. H., Linfield, E. H., Davies, A. G., Brünig, M., Mills, T., Rosendahl, C., Soyer, H. P. and Rakić, A. D. (2025). Visualizing terahertz-tissue interactions for early skin pathology detection. 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Helsinki, Finland, 17-22 August 2025. Piscataway, NJ, United States: IEEE. doi: 10.1109/irmmw-thz61557.2025.11319771
Funding
Current funding
Past funding
Supervision
Availability
- Dr Karl Bertling is:
- Available for supervision
Looking for a supervisor? Read our advice on how to choose a supervisor.
Supervision history
Current supervision
-
Doctor Philosophy
Application of non-contact THz spectroscopic imaging towards preservation of heritage structures in India
Associate Advisor
Other advisors: Professor Aleksandar Rakic
-
Doctor Philosophy
Understanding contrast mechanisms of absorption spectroscopy of skin DNA solutions using biomolecule dynamics
Associate Advisor
Other advisors: Dr Tina Qi
-
Doctor Philosophy
Engineering Beam Profiles in Terahertz Quantum Cascade Lasers: An Electromagnetic Approach
Associate Advisor
Other advisors: Dr Tina Qi, Professor Aleksandar Rakic
Completed supervision
-
2025
Doctor Philosophy
Terahertz imaging using optical feedback in quantum cascade lasers
Associate Advisor
Other advisors: Dr Tina Qi, Professor Aleksandar Rakic
-
2022
Doctor Philosophy
Light-matter interactions at the nanoscale: a case for terahertz near-field spectroscopy in semiconductor nanodevices
Associate Advisor
Other advisors: Professor Aleksandar Rakic
Media
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